Nano carbon dry powder wall paint

The invention discloses nano carbon dry powder wall paint, relating to wall paint for buildings. Aiming at the defects of the prior art, a formula of the nano carbon dry powder wall paint is adjusted to ensure that the wall paint is safe in construction, is non-toxic and harmless, and is long in service life. The nano carbon dry powder wall paint comprises the following raw materials in parts by weight: 3-6 parts of nano carbon, 20-30 parts of hydroxypropyl methyl cellulose (HPMC), 200-300 parts of redispersible latex powder, 200-300 parts of heavy calcium carbonate with the fineness of 1500 meshes, 700-800 parts of calcium hydroxide with the fineness of 500-1000 meshes, and 20-30 parts of defoaming agent powder. The nano carbon dry powder wall paint disclosed by the invention has the advantages of no toxicity, harmlessness, aging resistance, high color consistency, high paint dispersion performance, good stability, water-washing performance and low dry powder packaging and transportation ...

Method for prolonging gamma TiAl three-point flexural fatigue life

The invention discloses a method for prolonging a gamma TiAl three-point flexural fatigue life. The method comprises the following steps that: a press-in type shot blasting machine is used for shot blasting on the surface of gamma TiAl, and the shot blasting parameters comprise that: the diameter of the stainless steel shot is 0.25mm, the inclined angel of a shot blasting gun and the surface of the sample is between 80 and 90 degrees, the distance between the shot blasting gun and the sample is between 14 and 16cm, the shot blasting time is 80 to 100s, the shot blasting strength is between 0.26 to 0.43Mpa, so that the residual compressive stress is generated on the surface, which facilitates the improvement of the fatigue life. The method can further develop the anti-fatigue property of intermetallic compounds of gamma TiAl so as to meet the development requirements on high-performance gas turbine engines.

Method for prolonging gamma TiAl three-point flexural fatigue life

The invention discloses a method for prolonging a gamma TiAl three-point flexural fatigue life. The method comprises the following steps that: a press-in type shot blasting machine is used for shot blasting on the surface of gamma TiAl, and the shot blasting parameters comprise that: the diameter of the stainless steel shot is 0.25mm, the inclined angel of a shot blasting gun and the surface of the sample is between 80 and 90 degrees, the distance between the shot blasting gun and the sample is between 14 and 16cm, the shot blasting time is 80 to 100s, the shot blasting strength is between 0.26 to 0.43Mpa, so that the residual compressive stress is generated on the surface, which facilitates the improvement of the fatigue life. The method can further develop the anti-fatigue property of intermetallic compounds of gamma TiAl so as to meet the development requirements on high-performance gas turbine engines.

Flow cytometer multi-wavelength excitation laser cluster method and device

The invention provides a flow cytometer multi-wavelength excitation laser cluster method and a device. According to the method and the device, a structure of an apparatus and adjustment can be simplified and optimized, cost is greatly reduced, excitation laser energy loss can be further reduced to a maximum degree, and optical signal intensity of a to be measured cell is improved. The flow cytometer multi-wavelength excitation laser cluster method is characterized in that: excited multi-wavelength excitation laser of multiple laser devices after reverse dispersion and focusing through a dispersion focusing device forms a mixed-wavelength single light beam.

Oceanic atmosphere corrosion resistant thermal barrier coating

The invention discloses a thermal barrier coating resisting oceanicity atmosphere corrosion, controlling the Y2O3in ZrO2 which relative to the stability of Y2O3 as ceramic layer by preparing alpha-Al2O3 thin layer on the ceramic layer adopting electron beam physical vapor deposition method, and improving corrosion resistance of thermal barrier coating.

Test device for surface deformation of material and test method thereof

The invention discloses a test device for surface deformation of a material and a test method thereof, wherein the device comprises a material mechanical property test machine, an infrared fast heating device, a surface deformation optical test system, a temperature collecting device, a vacuum system and a clamp. The clamp fixes a sample in a vacuum chamber of the vacuum system and is connected with the material mechanical property test machine, the infrared fast heating device supplies thermal load for the sample, and the surface deformation optical test system measures the surface deformation of the sample. The device and the test method can simultaneously heat, apply stress and synchronously test deformation field in the surface. The coupling simulation of an aero-engine under service environment with high temperature and loading level, and the surface deformation condition of the structural material with high temperature under the environment are tested.

Heat processing technique for thinning TiAl-base alloy sheet interlayer spacing

Bonding layer resisting high-temperature oxidation and formation of secondary reaction zone on high-temperature alloy surface and method for preparing same

The invention discloses a bonding layer resisting high-temperature oxidation and the formation of a secondary reaction zone on a high-temperature alloy surface and a preparation method thereof. The preparation method comprises the following steps: firstly, electroplating a Ru layer on a substrate by using the electroplating method; and secondly, depositing a MCrAlYHf layer by using an electronic-beam physical vapor deposition method to obtain the bonding layer with a MCrAlYHf/Ru double-layer structure. The double-structured bonding layer can effectively resist the mutual-diffusion between the substrate and a coating element, resist the formation of the secondary reaction zone (SRZ), thereby improving the high-temperature oxidization resistant performance of the high-temperature alloy. The bonding layer is a novel thermal barrier coating bonding layer material.

区熔定向凝固法制备磁驱动记忆合金单晶

The present invention relates to a zone-melting directional solidification method fo r preparing magnetic driving memory alloy monocrystal, and is characterized by that it utilizes the control of length of melting zone, temperature gradient and crystal growth speed to prepare Ni50-58 Mn207-30 Ga20-25 alloy monocrystal, and its technological process includes the following steps: (1) using vacuum induction process for smelting mother alloy; (2) directly casting rod in vacuum induction furnace; (3) making zone-melting directional solidification, controlling length of melting zone in 10-20 mm, solidification temp. gradient in 200-1000 K/cm and crystal growth speed in 1-20 mm/min; (4) preparing out NiMnGa alloy monocrystal; (5) making chemical analysis or using electronic probe to determine its chemical components; and (6) thermal analysis to measure its martensitic phase transformation temp. and others.

Two-layer MCrAlY bonding layer and preparation method thereof

Composite multilevel Y2O3 powder crucible and method for producing the same with isostatic pressing technique

The invention discloses a composite multi-level Y2O3 crucible and a method for preparing the same by an isostatic pressing process. The multi-level Y2O3 crucible is prepared from multi-level Y2O3 powder and binder, wherein 20-100 ml of the binder is added to 1,000g of the composite multi-level Y2O3. During the preparation process, Y2O3 powders with different particle diameters are mixed, and small particles enter the voids of large particles during the mixing; therefore, the density of the Y2O3 crucible is increased, and the volume change when sintering at a high temperature is reduced. The prepared Y2O3 crucible can be used for smelting high-melting point active metal or alloy at 1,600-2,000 DEG C.

Rhenium-containing Ni3Al-based single crystal alloy

The invention provides a rhenium-containing Ni3Al-based single crystal alloy, which comprises the following components in percentage by weight: 7 to 8 percent of Al, 8 to 13 percent of Mo, 0.0005 to 3 percent of Re and the balance of Ni; and the rhenium-containing Ni3Al-based single crystal alloy also can contain more than one of 0.05 to 0.5 percent of Dy, 0.1 to 1 percent of Y and 0.05 to 0.5 percent of Hf. In the rhenium-containing Ni3Al-based single crystal alloy, the rhenium element is added into a Ni3Al-based single crystal alloy, so that the rhenium element is subjected to solid solution in a gamma' phase and a gamma phase and forms a rhenium atom cluster in short range order in the gamma phase. At high temperature, the diffusion coefficient of rhenium in the gamma phase and the gamma' phase is small, the diffusion coefficients of other alloy elements such as Al, Mo and the like in the gamma phase and the gamma' phase can be reduced, and the high temperature stability of the alloy ...

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by V

Method for smelting composite multilevel Y2O3 powder crucible by employing induction

The invention discloses a method for preparing a composite multi-level Y2O3 crucible by induction melting. The method comprises sectionally filling Y2O3 powders with different particle diameters into an induction coil; and heating a crucible original mold to sinter the Y2O3 powders. The prepared Y2O3 crucible can be used for smelting high-melting point active metal or alloy at 1,600-2,000 DEG C.

Preparation method of SnS3 nano powder

The invention discloses a preparation method of SnSe nano powder and belongs to the technical field of nano materials. The preparation method of the SnSe nano powder comprises the following steps: preparing high-purity substances of Sn element and Se element according to a stoichiometric ratio of a final product, putting the substances into a planet type high energy ball-milling machine for mechanical alloying under the protection of inert gas, carrying out dry grinding at a certain rotating speed, directly synthesizing a compound, then adding a certain amount of absolute ethyl alcohol, carrying out wet grinding, and finally drying, so that SnSe superfine powder is obtained. The preparation method of the SnSe nano powder has the advantages of available raw materials, short time and controllable particle size, and is easy to operate, so that the preparation method of the SnSe nano powder is applicable to mass production.

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Ta

The present invention discloses one kind of Ta modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, Ta in 1-13 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding Ta element to modify and form one Laves(Cr2Ta) phase with Cr, the Ta modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has high room temperature toughness and plasticity and further raised high temperature strength. The Ta modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 120-400 MPa and density of 6.1-6.9 g/cu cm.

Transient state ultrahigh temperature resisting heat barrier coat ceramic layer material and preparation method thereof

The invention discloses a thermal barrier coating ceramic layer material with transient ultrahigh temperature resistance, which is a Nb2O5 doping YSZ-YSH ceramic layer material composed of Y2O3 at a mol ratio of 1-5, HfO2 at a mol ratio of 1-40, Nb2O5 at a mol ratio of 1-5 and the rest of ZrO2. The thermal barrier coating ceramic layer material can bear the transient ultrahigh temperature at 2500K-3000K per second, fuel gas thermal shock at Mach node 3-6 as well as erosion and ablation. The Vickers hardness (HV) is 800-1300. The basal body containing the Nb2O5 doping YSZ-YSH ceramic material layer is well kept after 10 times of thermal shock circulation at the test temperature of 2500K and the Mach node of 3; the basal body containing the Nb2O5 doping YSZ-YSH ceramic material layer has corrosion pit after 35 times.

Nb-Ti-Si-Sr alloy material and preparation method thereof

The invention discloses an Nb-Ti-Si-Sr alloy material and a preparation method thereof. The alloy material consists of 50 to 78 at percent of Nb, 1 to 20 at percent of Si, 16 to 28 at percent of Ti and 0.01 to 2 at percent of Sr, and in addition, the atom percentage sum of all ingredients is 100 percent. The high-temperature alloy comprises an Nb-based solid solution phase Nbss, a Nb-silicide phase Nb5Si3 and an eutectic structure Nbss+Nb5Si3, and has the fracture toughness property of 15-26MPa.ml/2 at 18-25 DEG C, the compressive yield strength of 1500-2100MPa at 18-25 DEG C, and the compressive yield strength of 300-600MPa at 1250-1350 DEG C. The alloy material of the invention can be used in environment at 1100-1400 DEG C.

Method for preparing Ni3A1-based rhenium-contained moncrystal alloy with liquid metal cooling method

The invention provides a method for preparing Ni3A1-based rhenium-contained moncrystal alloy with a liquid metal cooling method, which concretely comprises the following steps of: firstly, preparing a liquid metal cooling medium; secondly, preparing a Ni3A1-based rhenium-contained alloy coupon; and thirdly, preparing a Ni3A1-based rhenium-free alloy seed crystal and the like. In the method, liquid metal (such as gallium and indium alloy or tin) is used as the cooling medium so that the cooling speed of a casting and the temperature gradient (200-350 K/cm) of a solid and liquid interface are increased; and a Ni3A1-based rhenium-contained moncrystal high-temperature alloy with small primary dendrite arm spacing, uniform tissues and low segregation is prepared with a seed crystal method through changing solidification process parameters such as heating temperature, pulling rate and the like, thereby obtaining Ni3A1-based rhenium-contained moncrystal alloy with excellent mechanical property ...

Composite carbon-resisting coating material and method for preparing the same on substrate

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Zr

Preparing high giant magnetic resistance effect nano multiplayer membrane on silicon-based chip by sputtering process and its prepn. method

In the invention, tantalum 1-4nm, ferro nickel 1-4nm, copper l-3nm, and cobalt 1-4nm material layers are sputtering deposited on surface of silicon single-crystal substrate in (111) orientation in sequence. the film in multiple layer is in simple structure and gigantic magneto resistor value reaches to 100%. Operation of sputtering deposition is carried out by magnetron sputtering technique: silicone base plate is put on rotatable table, and target materials are installed on own target platform. Based on thickness of each material to be sputtered, current and voltage applied are adjusted. Features are: simple procedures, easy of operation and controllable thickness.

Method for preparing NbSi-base ultrahigh-temperature alloy through EBM (Electron Beam Melting)

The invention belongs to the technical field of high-temperature alloy preparation and particularly relates to a method for preparing NbSi-base ultrahigh-temperature alloy through EBM (Electron Beam Melting). By using electron beam selective melting equipment and arranging reasonable process parameters, the preparation of an NbSi-base alloy three-dimensional formed part can be completed in one step directly through a CAD (Computer-Aided Design) model. The density of the obtained NbSi-base alloy is high, the NbSi-base alloy mainly comprises NbSS (Nb Solid Solution) and an Nb5Si3 strengthening phase, the phase size is very fine (smaller than 1[mu]m) and the distribution is uniform. The method has the advantages that a mold is not needed during the preparation of the NbSi-base alloy, the alloy pollution is reduced, the impurity content is decreased, the material utilization ratio is high, and the mechanical property and the production efficiency of the NbSi-base ultrahigh-temperature alloy ...

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Ta

Preparation of nano multilayer high-resistance soft magnetic material by electronic beam gas phase deposition and method thereof

The method for preparing nano multilayer high-impedance soft magnetic material by electron-beam physical vapour deposition processon metal or non-metal surface is characterized by that said soft agnetic material is formed from iron system soft magnetic material and ceramic material, its structure is as follows: one layer of iron system soft magnetic material and one layer of ceramic material or one layer of iron system soft magnetic material and one layer of iron system soft magnetic material plus ceramic material layer to form composite singe layer film. By means of control of grain size of every layer, uniaxial anisotropy and interlayer space it can obtain the nvented nano composite multilayer soft magnetic material with high saturated magnetic intensity and high resistance. It is applicable to various electronic devices, film and coating worked under the high-frequency alternating magnetic field.

Method for making composite multi-stage fine powder Y2O3 copple by isostatic pressing process and dry press

The invention discloses a method for producing a compound multilevel Y2O3 fine powder crucible by adopting the isostatic molding dry-press technique. The raw material of the compound multilevel Y2O3 fine powder crucible is the compound multiple Y2O3 fine powder; 40 to 80 grams of the second-stage Y2O3 powder material with a grain diameter between 0.5 and 10 mu m, 10 to 30 grams of the first-stageY2O3 powder material with a grain diameter between 0.01 and 0.5 mu m, and 10 to 30 grams of the third-stage Y2O3 powder material with a grain diameter between 10 and 200 mu m are added into 100 gramsof the compound multilevel Y2O3 fine powder. In the preparation technology, the Y2O3 fine powder with different grain diameters is mixed; in the mixing process, the grains with small diameters enter the gaps of great grains, thereby increasing the density of the compound multilevel Y2O3 fine powder crucible and reducing the change in volume in the high temperature sintering process; the compound multilevel ...

Thermal barrier coating sample clamping device and clamping method

The invention discloses a thermal barrier coating sample clamping device and method, and relates to the field of thermal barrier coating near-working-condition service environment simulation test systems.The thermal barrier coating sample clamping device comprises a station connecting plate, an elbow joint and a clamp, and the clamp comprises a first connecting mechanism, a second connecting mechanism and two symmetrically-arranged clamping plates; after the two clamping plates are in butt joint, the two runner grooves are in butt joint to form a first runner, the two half holes are in butt joint to form a positioning hole, the positioning hole is used for positioning a thermal barrier coating sample, the thermal barrier coating sample is in linear contact with the clamping plates, and the thermal barrier coating sample can move in the positioning hole; and the second connecting mechanism is used for installing the two clamping plates on the upper portion of the station connecting plate ...

Multilayer thermal barrier coating and preparation method thereof

The invention provides a multilayer thermal barrier coating and a preparation method thereof. The multilayer thermal barrier coating sequentially comprises an adhesion layer, a first ceramic layer, a second ceramic layer and a closing layer from bottom to top, wherein the closing layer has the thickness of 10-30 micros and the porosity of 2-8 percent and is made from the Al2O3. The thermal barrier coating can be prepared by adopting an electron beam physical gas-phase deposition technology or a plasma spraying method. The multilayer thermal barrier coating provided by the invention can avoid the stripping of the ceramic layers in a thermal circulating process, the thermal erosion resistance of the thermal barrier coating is greatly improved than the dual ceramic layers; and vertical crackles are introduced in the ceramic layer through improving a conventional plasma spraying process so that the thermal shock life of the thermal barrier coating is greatly prolonged.

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Co

The present invention discloses one kind of Co modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, Co in 1-16 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding Co element with solid solution reinforcing effect to modify and introduce one third plastic phase, the Co modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has further raised high temperature strength and room temperature toughness and plasticity. The Co modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 110-130 MPa and density of 6.02-7.06 g/cu cm.

Thermal barrier coating suitable for nickel-based high-temperature alloy with high Mo content

The thermal barrier coating suitable for nickel-base high temperature alloy with high Mo content has one composite adhering layer, which is prepared through physical vapor electron beam deposition process between the nickel-base high temperature alloy with high Mo content and one ceramic layer and includes one Si containing adhering layer I and one no-Si adhering layer II. The thermal barrier coating can inhibit the diffusion of Mo from the nickel-base high temperature alloy and thus has long service life.

In-situ preparing of insulating film on surface of marmem

A process for in-situ preparing insulating film on the surface of marmem includes abrasing the Ni-Ti marmem with fine abrasive paper for removing surficial oxidized film, polishing, loading it along with reacting liquid in reactor made of stainless steel, sealing, heating to 160-240 deg.C, keeping the temp for 8-14 hrs,and testing its performance.

Preparation of anti-oxidation aluminium-compper-iron-chromium quasi crystal coating of titanium alloy surface

The quasi-crystal Al-Cu-Fe-Cr coating with the make-up of Al71Cu10Fe8.5Cr10.5 on the surface of titanium alloy is prepared with spherical quasi-crystal Al-Cu-Fe-Cu powder of 250-325 mesh granularity.The preparation process is a low pressure plasma spraying process including first atomizing to form the spherical powder and then low pressure plasma spraying with the technological parameters of main airflow rate 60 L/min, auxiliary airflow rate 25-30 L/min, arc current 560-600 A, arc voltage 5-60 V, and powder feeding amount of 15-20 g/min.

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by W

The present invention discloses one kind of W modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, W in 1-15 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding W element to modify and form one pseudo binary eutectic phase with NiAl, the W modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has high room temperature toughness and plasticity and further raised high temperature strength. The W modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 110-200 MPa and density of 6.8-7.8 g/cu cm.

Method for preparing diffusion-resistant coating for single-crystal high-temperature alloy

The invention discloses a method for preparing a diffusion-resistant coating for single-crystal high-temperature alloy. A carburized layer of dispersed nano-scale or submicron-scale carbide is deposited on the surface of a single-crystal high-temperature alloy matrix by an electron beam physical vapor deposition process, a MCrA1X bonding layer is deposited after diffusion treatment (M is one of Ni and Co or combination thereof, and X is Y, Dy and Hf), and the nano-scale or submicron-scale carbide is formed actively by the carburized layer and supersaturated refractory alloy elements in the alloy, so that the chances that the refractory alloy elements are separated out in the alloy are reduced, and the organizational stability in the alloy is improved. The thickness of the carburized layer in the carburized diffusion-resistant coating is between 20 and 40 mu m, an element diffusion region is within the range of the thickness of the carburized layer and prevents harmful SRZ and TCP phases ...

MCrAlY coating with excellent oxidation resistance and preparation method thereof

The invention discloses an MCrAlY coating with excellent oxidation resistance and a preparation method thereof. By adopting a plasma-assisted electron beam physical vapor deposition technique and controlling the substrate temperature, the anodal discharge voltage, the evaporation voltage and the bias voltage applied on a matrix, the MCrAlY coating is prepared, and the crystallite dimension of the coating is 10 Mu m to 50 Mu m of isometric crystal structure; the orientation of the coating along a (111) close-packed direction is strong; the twin crystal dimension in the coating is 200nm to 500nm; the Beta phase in the coating is uniformly distributed in the form of strips along the growing direction, moreover, the dimension of the Beta phase is less than 1 Mu m, and a large quantity of phase interfaces are formed. When the coating is used under the temperature of 1150 DEG C, the high-density twin crystals and the phase interfaces provide passages for Al element to quickly diffuse outwards ...

Gradient heat barrier coat of adhesive layer in continuously variational component formed through physical vapor deposition of electron beam

Heat processing technique for thinning TiAl-base alloy sheet interlayer spacing

A heat treatment of TiAl based alloy is used to fine lamellar distance, which is available for TiAl with 45-51at% Al content or TiAl with 42-46at% Al and 5-10at% Nb. Cast ingots are treated by homogenizing, heat isopressing, and aging at alpha and gamma zones cyclically. Parameters, e.g. heating and cooling rates, temperatures are all controlled to refine layer distance while keeping lamellar status.

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Nb

The present invention discloses one kind of Nb modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, Nb in 1-13 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding Nb element to modify and form one strong Laves(Cr2Nb) phase with Cr, the Nb modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has effectively raised high temperature strength. The Nb modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 150-400 MPa and density of 6.1-6.7 g/cu cm.

Two-layer MCrAlY bonding layer and preparation method thereof

The invention discloses a two-layer MCrAlY bonding layer and a preparation method thereof, which uses the plasma-assisted electron beam physical vapor deposition technology to prepare a coating with the following structure: the bottom layer is a low-aluminum (3-5wt.%) MCrAlY layer with a preferential-growing equiaxed crystal structure with the thickness of 5-20 micro meters and the crystal size of 20-50 micro meters; and the upper layer is a high-aluminum (8-12wt.%) MCrAlY layer with a columnar crystal structure, the thickness of 20-100 micro meters and the crystal size less than 1 micro meter. The two-layer structure can reduce the element interdiffusion between the MCrAlY coating and a high-temperature alloy matrix, therefore, the coating has better high-temperature oxidation resistance. Besides, the two-layer structure can inhibit the recrystallization, the TCP phase separation and the formation of a secondary reaction zone (SRZ) of the directionally solidified high-temperature alloy ...

Co-M-C alloy and method for manufacturing same with liquid metal cooling method

The invention discloses a Co-M-C alloy and a method for manufacturing the same with a liquid metal cooling method, wherein, the M in the Co-M-C alloy is one or combination of more than one of metallicelements such as Cr, Ni, W, Mo, Al, Ti, Ta, Zr or B. In the invention, the Co-M-C alloy is manufactured by the liquid metal cooling method, wherein, the liquid metal is a gallium-indium alloy or a tin alloy; and the high-temperature Co-M-C alloy with small dendritic crystal spacing, uniform tissue, low segregation and good performance can be manufactured by controlling cooling speed and temperature gradient of a solid liquid interface.

Iridium hafnium niobium high temperature alloy materials and method for preparing same

The invention discloses an iridium, hafnium and niobium high-temperature alloy, which comprises 85~96at% of iridium, 2~6at% of hafnium and 1~10at% of niobium. Properties of the material: density, 21í½22g/cm3; Young's elastic modulus, 150í½210GPa; diamond pyramid hardness in room temperature, HV620í½850; yield strength in 1500Deg. C, 80MPaí½140MPa; rate of deformation, more than 30%; yield strength in 1800Deg. C, 120MPaí½400MPa; yield strength in 1500Deg. C, 300í½650MPa; service temperature 1200~1950Deg. C.

Process for removing ceramic layer from thermal barrier coating

The invention discloses a method for removing the ceramic layer in thermal barrier coating, adopting the process of soaking the test piece with thermal barrier coating into the solution of potassium hydroxide (KOH) in 580~800 degree centigrade and sodium hydroxide (NaOH) for 3~20 minutes. The method can removing the ceramic layer completely with no damage to the test piece, short time and low demand to the equipments.

Multielement rare earth oxide doped zirconia thermal barrier coating with craze crack structure and preparing method thereof

The invention discloses a method for preparing a rare earth oxide doped zirconia thermal barrier coating with a craze crack structure, which solves the problems of low thermal shock resistance property, difficult further thermal conductivity reduction and the like of the thermal coating prepared by conventional plasma spraying. Under the condition of the plasma spraying technology, the preheating temperature of a base body, the moving speed of a plasma spraying gun and a powder delivery rate are adjusted, then a rare earth oxide doped zirconia thermal barrier coating (BH-TBCO1) with a craze crack structure and stable thermodynamics is prepared. The rare earth oxide doped zirconia thermal barrier coating with a craze crack structure has good high-temperature phase stability at the temperature below 1300 DEG C; the thermal insulation property of the thermal barrier coating is further enhanced, and the thermal insulation temperature achieves more than 150 DEG C and is enhanced by more than ...

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Co

Method for making composite multi-stage Y2O3 power copple by gel casting moulding process

The invention discloses a method for producing a compound multilevel Y2O3 powder crucible by adopting the gel-casting technique. In the process of producing the crucible, the gel-casting technique is adopted; the crucible which has high intensity, high density, small change in volume and closes to the net size is obtained by preparing the compound multilevel Y2O3 ground paste with high solid content and low viscosity coefficient. The compound multilevel Y2O3 powder material used by the compound multilevel Y2O3 powder crucible is the first-stage Y2O3 powder material with a grain diameter between 0.01 and 0.5 mu m, the second-stage Y2O3 powder material with a grain diameter between 0.5 and 10 mu m, the third-stage Y2O3 powder material with a grain diameter between 10 and 200 mu m, the fourth-stage Y2O3 powder material with a grain diameter between 200 mu m and 3mm, the fifth-stage Y2O3 powder material with a grain diameter between 3mm and 5mm. The compound multilevel Y2O3 powder crucible ...

Transitory efficient insulating paint

An efficient insulating paint is prepared from organic silicon resin as basic material and filler including asbestos powder (15-25 wt.%), ZrO2 (6-10), aluminium silicate powder (2-4) and silicate powder (2-4) in the ratio of 3 : 1 through proportioning and stirring. After coated on the substrate and baked at 20-30 deg.C for 0.5-1 hr, an efficient insulating layer is formed on the surface of substrate.

Electron-beam physical vapor deposition process of preparing composite nano soft magnet and ceramic film

In the electron-beam physical vapor deposition process, double evaporation source and double electron-beam are used to evaporate metal and ceramic rod and the rotation speed of the substrate and the evaporation rate of both metal and ceramic are regulated to obtain nano composite film with different components. Specially, the process includes setting N6 or W on ferro-silicon alloy and Fe-Ni alloyrod, setting alloy rod and ceramic rod in two crucibles separately, installing substrate, pumping to required vacuum rotating the substrate, heating the substrate, evaporating alloy rod and ceramic rod separately, opening the baffle to deposit and other steps.

Nb-Ti-Si-Zn alloy material and preparation method thereof

The invention discloses an Nb-Ti-Si-Zn alloy material and a preparation method thereof. The alloy material is composed of 50-78at% of Nb, 1-20at% of Si, 16-28at% of Ti and 0.01-2at% of Zn, wherein the sum of atomic percentage composition of all components is 100%. The high-temperature alloy comprises niobium-base solid solution phase Nbss and niobium silicide phase Nb5Si3; at the temperature of 18-25DEG C, fracture toughness is 17-28MPa.m1/2, compressive yield strength is 1100-1800MPa at the temperature of 18-25DEG C, and compressive yield strength is 200-500MPa at the temperature of 1250-1350DEG C. The alloy material of the invention can be applied to an environment at the temperature of 1100-1400DEG C.

Method for realizing MCrAlX protective coating through ion plating deposition and device

The invention discloses a method for realizing a MCrAlX protective coating through physical vapor deposition of electron beams activated by plasmas in a vacuum environment and a device for realizing the method. The method comprises the steps of arranging at least two crucibles with MCrAlX targets in a vacuum cavity, and placing a proper amount of metal Nb above the targets; bombarding the two crucibles by using an electronic gun to melt the metal Nb and evaporate the MCrAlX targets. A high-temperature molten pool formed by the metal Nb emits a great number of hot electrons and MCrAlX steam under the action of an alternating current arc source, the hot electrons and the MCrAlX steam act together to trigger a hot cathode arc to discharge to form high-density MCrAlX plasma steam, and the two crucibles are alternately used as an anode and a cathode in the process. The plasma steam is deposited under the action of bias voltage of a base plate to form a MCrAlX coating, and the base plate can ...

Method for smelting composite multilevel Y2O3 powder crucible by employing induction

The invention discloses a method for preparing a composite multi-level Y2O3 crucible by induction melting. The method comprises sectionally filling Y2O3 powders with different particle diameters into an induction coil; and heating a crucible original mold to sinter the Y2O3 powders. The prepared Y2O3 crucible can be used for smelting high-melting point active metal or alloy at 1,600-2,000 DEG C.

Method for preparing coat of aluminide with chrome modified for enhancing performance of high heat oxidation resistance of TiAl alloy

A process for preparing the coated Cr modified Al compound layer on the surface of TiAl alloy in order to improve its resistance to high-temp oxidizing includes quantitatively taking the penetrant which contains Al (8-12 wt.%), Cr (25-35%), sodium chloride (1-3%), ammonium chloride (2-4%) and Al2O3 (rest), grinding while stirring, baking at 110 deg.C, loading in crucible, burying TiAl alloy in it, putting the crucible in electric furnace, introducing argon gas, and heating to 1100 deg.c.

Apparatus and method for preparing nano multilayer hard coating

The invention discloses an apparatus and a method for preparing a nano multilayer hard coating. According to the invention, different evaporation target materials are respectively placed in at least two evaporation crucibles, periodic evaporation of different coating materials can be realized through jump of an electron beam emitted by a program control electron gun between two crucibles, metal steam is formed; metal steam and electron in a low-voltage heavy-current electron beam emitted by a hollow cathode electron gun are mutually bumped for ionization, a high density plasma is generated, and is reacted with introduced reaction gas, and the coating is formed under effect of negative bias of a substrate. The nano multilayer hard coating is in a MeX/Me'X alternative structure. The apparatus has the advantages of fast deposition speed, compact coating without liquid drops, flexible control of modulation period and layer thickness ratio. Due to the rigidity effect of the nano multilayer hard ...

Atmosphere plasma spraying method for manufacturing hyperthermia sealing coating

The invention discloses a BaLn2Ti3 plus XO10 plus Y seal coating spray preparation technological method by adopting atmospheric plasma. Due to the low melting point of the BaLn2Ti3 plus XO10 plus Y, the inventor proposes that: first, the power of the plasma spray gun is lowered to melt the material and keep the structure from decomposing; second, the distance between the powder feeding port of thespray gun and the plasma spray nozzle is widened, and the distance between the powder feeding port and the base plate is reduced, thus increasing the temperature of the base plate; third, the combination of the first one and the second one prevents the problems of seal coating decomposition and lower bonding strength of the coating interface due to the super-high flame temperature of the plasma or fast cooling speed of the base plate.

Method for preparing lanthanum titanium aluminate ceramic material by sol-gel method

The invention discloses a method for preparing lanthanum-aluminum acid titanium ceramic material by adopting the sol-gel method. With aluminium nitrate, lanthanum nitrate, and tetra-n-butyl titanate as raw materials and anhydrous alcohol as solvents, the invention obtains a sol precursor evenly mixed at the molecular level by adopting the sol-gel method so as to lead to an easier and more completeimplementation of the subsequent agglomeration reaction, thereby obtaining LaTi2A19O19 compound oxide ceramic powder with high purity, even granularity, and good fluidity. The adoption of the preparation method of the invention solves the problem that unevenly mixing of raw materials leads to the low product purity when the LaTi2A19O19 ceramic powder is prepared in a solid state reaction. The LaTi2A19O19 ceramic powder of the invention can be used as the thermal barrier ceramic coating.

提高TiAl合金抗高温氧化的铬改性铝化物涂层的制备

... 一种提高TiAl合金抗高温氧化的铬改性铝化物涂层的制备，该涂层由铝67、钛25和铬8组成，其制备工艺采用包埋渗的方法制备，其方法是：先按量准确称取渗剂，渗剂的配比按重量百分比为：8-12％铝，25-35％铬，1-3％氯化钠，2-4％氯化氨，其余为三氧化二铝；将称取好的渗剂进行研磨和搅拌；将充分混合好的渗剂置于温度为110℃的烘箱中进行烘干；把烘干过的渗剂装入坩埚，并把试样埋入渗剂中，再将坩埚置入高温电阻炉后通入干燥氩气，加热到1100℃，通过控制时间，实现在TiAl合金表面制备不同厚度的铬改性铝化物涂层。 ...

Cutting preparation method of nickel-based single-crystal alloy seed crystal for casting

The invention discloses a cutting preparation method of a nickel-based single-crystal alloy seed crystal for casting. The cutting preparation method comprises the following steps of firstly machining a test rod or test plate which is used for preparing a seed crystal to obtain a test block with an upper parallel section and a lower parallel section, and carrying out polishing treatment on one of the parallel sections of the test block to obtain a polished surface; fixing the test block with the polished surface upward in the center of a rotating disc of an X-ray stress tester, marking a direction on the polished surface of the test block; determining an X-ray diffraction angle of a test block material, and scanning the psi angle and angle of the test block by utilizing the X-ray stress tester; carrying out the single-crystal directional cutting of the psi angle and an deflection angle by utilizing a wire cutting machine; finally preparing the seed crystal. The cutting preparation method ...

Water-soluble mold core for precision investment casting and preparation method of water-soluble mold core

The invention provides a water-soluble mold core for precision investment casting and a preparation method of the water-soluble mold core, and belongs to the technical field of mold core materials. According to the invention, inert materials such as talcum powder and quartz powder are not added, and urea particles with low particle size (less than or equal to 0.5 mm) are used for replacing the inert materials, so that the water solubility and dissolution rate of the mold core can be improved while the surface quality of the mold core is ensured. Urea particles, sodium bicarbonate and molten polyethylene glycol serve as raw materials for preparing the mold core, almost no residual material exists after dissolution is completed, a large amount of time is not needed to clean an inner cavity of a casting, the production efficiency of a product can be improved, hydrochloric acid does not need to be added in the mold core dissolution process, efficient dissolution can be achieved, and the production ...

Thermal barrier coating material for oxide ceramics InFeZnO4 and preparation method thereof

The invention discloses a thermal barrier coating material for oxide ceramics InFeZnO4 and a preparation method thereof, and belongs to the technical field of new materials. The preparation method comprises the steps of ball milling, cold pressing and solid state sintering, namely mixing In2O3 (the purity is 99.9 percent), Fe2O3 (the purity is 99.99 percent) and ZnO (the purity is 99.99 percent) uniformly in a stoichiometric ratio, performing ball milling, performing cold pressing, and sintering by a solid state reaction method to prepare the InFeZnO4 oxide ceramics. Compared with other thermal barrier coating materials, the thermal barrier coating material prepared by the method has the advantages of low cost, low thermal conductivity, moderate expansion coefficient, high thermal stability and the like. The preparation method has the advantages of simple process, short synthetic time and forming time and the like.

Test device for surface deformation and material and test method thereof

The invention discloses a test device for surface deformation of a material and a test method thereof, wherein the device comprises a material mechanical property test machine, an infrared fast heating device, a surface deformation optical test system, a temperature collecting device, a vacuum system and a clamp. The clamp fixes a sample in a vacuum chamber of the vacuum system and is connected with the material mechanical property test machine, the infrared fast heating device supplies thermal load for the sample, and the surface deformation optical test system measures the surface deformation of the sample. The device and the test method can simultaneously heat, apply stress and synchronously test deformation field in the surface. The coupling simulation of an aero-engine under service environment with high temperature and loading level, and the surface deformation condition of the structural material with high temperature under the environment are tested.

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by V

The present invention discloses one kind of V modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, V in 1-16 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding V element to modify and form one Heusler phase to reinforce the base and raise the high temperature performance, the V modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has high room temperature toughness and plasticity and further raised high temperature strength. The V modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 120-150 MPa and density of 6.0-6.6 g/cu cm.

Antioxidant rhenium-containing Ni3Al-based high-temperature alloy

The invention provides an antioxidant rhenium-containing Ni3Al-based high-temperature alloy, which consists of the following elements in percentage by weight: 7.8 percent of Al, 11 to 14 percent of Mo, 0.5 to 3 percent of Re, 0.01 percent of boron and the balance of nickel Ni. The rhenium-containing Ni3Al-based high-temperature alloy has the advantages of inhibiting diffusion of Mo by adding Re, ensuring mechanical properties and improving oxidation resistance.

Method for preparing heat barrier coating with column form crystal structure ceramic layer

The invention discloses a thermal barrier coating preparation method with the columnar crystals coating to solve the problem of non-crystal coating and low anti-thermal in normal plasma spraying for the LaTi2Al9O19 ceramic material. It changes the distance and the technique data of the tack coat and ceramic powder channel in the normal plasma spraying process, so the thermal barrier coating of the LaTi2Al9O19 with the stable energetic and the columnar crystal structure. The thermal isolation temperature is 130deg.C-300deg.C and improves the strain limit and anti-thermal character, the hot circle life can reach above 1500 times and improves by 4 times.

Preparation of anti-oxidation aluminium-copper-iron-chromium quasi crystal coating on titanium alloy surface

High-temperature oxidation resisting chiomium modified sillicide coating and preparation thereof

Single-crystal nickel-based high-temperature alloy and element composition design method thereof

The invention belongs to the technical field of nickel-based superalloys, and particularly relates to a single-crystal nickel-based superalloy and an element composition design method thereof. The method for designing the elemental components of the single-crystal nickel-based superalloy comprises the following steps that alloy raw materials are smelted and cast according to the proportion of the elemental components of the nickel-based superalloy, and polycrystalline nickel-based superalloy casting blanks with different elemental component contents are obtained; the polycrystalline nickel-based superalloy casting blank is sequentially subjected to solution treatment and aging treatment, and the volume fraction of gamma'in the polycrystalline nickel-based superalloy obtained after aging treatment is detected and calculated; performing a performance detection test on the polycrystalline nickel-based superalloy subjected to aging treatment; and according to the element components in the polycrystalline ...

Low-phase point-variable high-strength TiNiFeMo marmem and use as pipe joint thereof

The invention was involved in low transformation temperature high intensity TiNiFeMo shape memory alloy and its application of pipe joint. This alloy consist of 0.1%-4% Fe, 0.1%-5% Mo, 45%-50% Ti and 45%-50% Ni. The alloy was melted and forged into bar and was produced into the structure and shape requested by mechanical methods. Such pipe joints could be augmented to join all kinds of pipes under the room temperature, even at -196deg.C. Pipes can be tightly seized up by the pipe joints, when they are returned to the room temperature naturally, so that non-leakage achieved. The pipe joints have the advantages, such as lightweight, high pressure-resistant, and fine safe reliability.

Active-element Sc-modified (Ni, Pt)Al high-temperature-oxidation-resisting bonding layer material and preparation method thereof

The invention discloses an active-element Sc-modified (Ni, Pt) Al high-temperature-oxidation-resisting bonding layer material and a preparation method thereof and belongs to the technical field of thermal barrier coatings. Electroplating and electron beam physical vapor deposition methods are adopted to prepare an Sc-modified (Ni, Pt) Al coating on nickel-base superalloy. The bonding layer material can be applied for a long time in the environment with the temperature more than 1150 DEG C. Compared with unmodified NiAl, the bonding layer material has the advantages that after Sc is doped, the oxidation rate of (Ni, Pt) Al is obviously reduced, the adhesion of an oxidation film is improved, and the peeling situation is inhibited; the oxidation film/ Ni Al interface becomes straight, and holes in the interface are eliminated; the bonding layer material has high resistance to high temperature oxidation and can be used as the bonding layer material of a high-temperature-resisting thermal barrier ...

Method for preparing lanthanum titanium aluminate ceramic material by coprecipitation method

The invention discloses a method for preparing lanthanum-aluminum acid titanium ceramic material by adopting the co-precipitation method. The lanthanum-aluminum acid titanium material used as thermalceramic coating is prepared by selecting the aluminium nitrate, lanthanum nitrate, and tetra-n-butyl titanate as raw materials. With the co-precipitation method, the method for preparing lanthanum-aluminum acid titanium ceramic material can prepare a precipitation product evenly mixed at the molecular level, thereby leading to easier and more complete implementation of the subsequent agglomerationreaction, and obtaining LaTi2 Al9 O19 ceramic powder with high purity, even granularity, and good fluidity.

Method for preparing lanthanum titanium aluminate ceramic material by coprecipitation method

The invention discloses a method for preparing lanthanum-aluminum acid titanium ceramic material by adopting the co-precipitation method. The lanthanum-aluminum acid titanium material used as thermal ceramic coating is prepared by selecting the aluminium nitrate, lanthanum nitrate, and tetra-n-butyl titanate as raw materials. With the co-precipitation method, the method for preparing lanthanum-aluminum acid titanium ceramic material can prepare a precipitation product evenly mixed at the molecular level, thereby leading to easier and more complete implementation of the subsequent agglomeration reaction, and obtaining LaTi2 Al9 O19 ceramic powder with high purity, even granularity, and good fluidity.

Transient state ultrahigh temperature resisting heat barrier coat ceramic layer preparation method

The invention discloses a thermal barrier coating ceramic layer material with transient ultrahigh temperature resistance, which is a Nb2O5 doping YSZ-YSH ceramic layer material composed of Y2O3 at a mol ratio of 1-5, HfO2 at a mol ratio of 1-40, Nb2O5 at a mol ratio of 1-5 and the rest of ZrO2. The thermal barrier coating ceramic layer material can bear the transient ultrahigh temperature at 2500K-3000K per second, fuel gas thermal shock at Mach node 3-6 as well as erosion and ablation. The Vickers hardness (HV) is 800-1300. The basal body containing the Nb2O5 doping YSZ-YSH ceramic material layer is well kept after 10 times of thermal shock circulation at the test temperature of 2500K and the Mach node of 3; the basal body containing the Nb2O5 doping YSZ-YSH ceramic material layer has corrosion pit after 35 times.

Method for making composite multi-stage Y2O3 powder copple by gel casting moulding process

The invention discloses a method for producing a compound multilevel Y2O3 powder crucible by adopting the gel-casting technique. In the process of producing the crucible, the gel-casting technique is adopted; the crucible which has high intensity, high density, small change in volume and closes to the net size is obtained by preparing the compound multilevel Y2O3 ground paste with high solid content and low viscosity coefficient. The compound multilevel Y2O3 powder material used by the compound multilevel Y2O3 powder crucible is the first-stage Y2O3 powder material with a grain diameter between 0.01 and 0.5 mu m, the second-stage Y2O3 powder material with a grain diameter between 0.5 and 10 mu m, the third-stage Y2O3 powder material with a grain diameter between 10 and 200 mu m, the fourth-stage Y2O3 powder material with a grain diameter between 200 mu m and 3mm, the fifth-stage Y2O3 powder material with a grain diameter between 3mm and 5mm. The compound multilevel Y2O3 powder crucible ...

Method for testing tensile mechanical performance of TiAl-base alloy

The invention discloses a method for testing the tensile mechanical performance of TiAl-base alloy, comprising the steps of preparing raw materials, designing the size of a sample under test, processing and cutting the sample under test, processing the surface of the sample under test, loading and unloading the sample under test repeatedly and measuring the sample under test repeatedly. The sample which has no gap and is under the in-situ tension test by a scanning electron microscope (SEM) is designed and is ruptured under uniform stress to increase the plastic deformation region. The sampleis tensed by being repeatedly loaded and unloaded with horizontal stress points on a standard mechanical performance curve. The method is particularly suitable for testing the tensile mechanical performance of the brittle material such as the TiAl-base alloy and can ensure that the morphology of the non-uniform plastic deformation of the brittle material such as the TiAl-base alloy which is tensed repeatedly ...

Composite binding course material and method for producing composite binding course by using combination of plating and electro beam physics vapour deposition

The invention discloses a composite bonding layer material and a method thereof to combine and prepare a composite bonding layer by adopting electroplating and electron beam physical gas-phase deposition, the composite bonding layer manufactured by the combining method has fore layers of structures, the composite bonding layer consists of a RuA1 layer and a NiA1Hf layer; the A1 content in the RuA1 layer is 30 to 50 percent, the residual is Ru; the NiA1Hf layer consists of a lower connecting layer, a middle layer, and an upper connecting layer; the A1 content in the lower connecting layer is 70 to 90 percent, the Hf content is 0.5 to 3 percent, the residual is Ni; the A1 content in the middle layer is continuously reduced from 70 to 90 percent to 40 to 50 percent, the Hf content is 0.5 to 3 percent, the residual is Ni; the A1 content in the upper connecting layer is 40 to 50 percent, the Hf content is 0.5 to 3 percent, and the residual is Ni.

Two-alloy compounded functionally gradient monocrystal blade material and preparation method thereof

The invention discloses a two-alloy compounded functionally gradient monocrystal blade material and a preparation method thereof and belongs to the technical field of high-temperature alloy and preparation thereof. The blade root and middle part of a monocrystal blade are made of Ni-based high-temperature alloy, and the blade top of the monocrystal blade is made of monocrystal blade material of Ni3Al-based hyperthermia alloy; the blade root and middle part of the material are predicted to have a better medium and low temperature service performance, and the blade top of the material is predicted to have better hyperthermia service performance. The preparation method comprises the steps of design of form, pouring technology, monocrystal growth control and thermal treatment system. According to the invention, through the design of a narrow passage of a graining device, the longitudinal distribution of two alloys in the blade can be accurately controlled, so that the process stability and ...

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Hf

The present invention discloses one kind of Hf modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, Hf in 0.1-11 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding Hf element to modify and form one Heusler (L21-Ni2AlHf) phase with NiAl, the Hf modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has high room temperature toughness and plasticity and further raised high temperature strength. The Hf modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 300-420 MPa and density of 6.02-7.66 g/cu cm.

In-situ preparing process of insulating film on surface of marmen and insulating film prepared thereby

High sintering -resistant thermal barrier coating with high thermal stability and low thermal conductivity

The thermal barrier coatings with high thermal stability, high sintering temperature and low heat conductivity are formed on nickel-base high temperature alloy base through physical vapor electron beam deposition process and include one adhering material layer and one ceramic material layer. The adhering material is MCrAlY, where M may be Ni alloy element and/or Co alloy element; and the ceramic material is lanthanum cerate La2.0-3.0Ce2O7.0-8.5. The thermal barrier coatings have high smelting point, no phase change, low heat conductivity, chemical stability and thermal expansion matching with nickel-base high temperature alloy base.

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by W

Magnetic striction material dynamic parameter testing system

The present invention discloses a testing system which can measure the dynamic parameter of the magnetostriction material, and consists of an alternating current impedance analyzer, a direct current stabilized supply, a nitrogen source, a coil kit, a pressure components and a base. The alternating current impedance analyzer is used to provide the alternating current impedance and the frequency parameter of the tested sample in different bias magnetic fields and under different pressure conditions; the alternating current impedance analyzer connects with the power supply of 220V and 50Hz; the delivered power of the direct current stabilized supply is 0-30V and 3A, and is used in enabling the coil A to produce the bias magnetic field in loading the required current; the nitrogen source is used to provide the required pressure of the tested sample. Through the testing of the alternating current impedance and the frequency parameter of the sample in different bias magnetic fields and underdifferent ...

Ultra-temperature BaPr2Ti3+xO10+Y sealing coating material and method of preparing the same

The invention discloses a super-high temperature BaPr2Ti3 plus XO10 plus Y seal coating material and the preparation approach thereof. The chemical composition of the compound is BaPr2Ti3 plus XO10 plus Y; wherein, X value ranges from 0.1 to 1, while, Y is from 0.1 to 2. The microhardness of the BaPr2Ti3 plus XO10 plus Y seal coating material parallel with the layer is 760.5 plus or minus 20, while the microhardness vertical with the layer is 338.5 plus or minus 30. The fracture toughness property parallel with the layer is 2.081 plus or minus 0.030MPa m minus 1/2, while it is 0.891 plus or minus 0.035MPa m minus 1/2 when vertical with the layer. The heat conductivity and the thermal-expansion coefficient are respectively 0.51 to 0.91Wm minus 1K minus 1 and 10.5 to 11.5 is multiplied by 10 minus 6K minus 1 at 1500 DEG C.. The BaPr2Ti3 plus XO10 plus Y material features the laminated structure, and the binding force between layers is weak. The BaPr2Ti3 plus XO10 plus Y material has the advantages ...

Polishing-free emulsion putty paste

The invention discloses a polishing-free emulsion putty paste and relates to a surface filling material for pretreating a construction surface before paint construction. After adjusting the formula, putty construction on a flat wall surface is easy, silk marks do not exist, the coating demand of a dope can be met without polishing when a putty wall is brushed; the formula of the materials of the polishing-free emulsion putty paste comprises the following components in parts by weight: 15-20 parts of hydroxypropyl methyl (HPMC), 8-10 parts of re-dispersible emulsion powder, 1-2 parts of starch ether, 150-250 parts of sodium bentonite, 1-1.5 parts of ash calcium (polyacrylamide), 300-450 parts of lime powder, 650-500 parts of heavy calcium carbonate (white stone powder) and 400-500 parts of water. By adopting polishing-free putty, a lot of dust generated because of polishing is prevented from affecting the heath of constructors, a construction process is omitted, the human power is saved, ...

Pyrogenic oxidation resistant nickel-aluminium-dysprosium coat bond material and preparation of hot screening coating

Zirconium-containing brazing filler metal and preparation method and application thereof

The invention provides zirconium-containing brazing filler metal and a preparation method and application thereof, and belongs to the technical field of brazing filler metal. The zirconium-containing brazing filler metal comprises the following preparation raw materials of 40-60 wt% of brazing base metal, 10-25 wt% of Zr, 2-15 wt% of Cr and the balance Ni. The brazing base metal is nickel-based single crystal high-temperature alloy, and the brazing base metal comprises 5.5 wt%-9.5 wt% of Al, 0.5 wt%-5 wt% of Cr, 5.5 wt%-12 wt% of Mo, 1 wt%-4 wt% of Re, 1 wt%-6 wt% of Ta and the balance Ni. According to the zirconium-containing brazing filler metal, Zr, Cr and Ni are added on the basis of brazing base metal for component modulation, the zirconium-containing brazing filler metal is suitable for brazing of the nickel-based single crystal superalloy, Zr serves as a melting reduction element, the atomic radius of Zr is large, Zr is not prone to being diffused into a matrix, and it is guaranteed ...

Magnetic striction material dynamic parameter testing system

The present invention discloses a testing system which can measure the dynamic parameter of the magnetostriction material, and consists of an alternating current impedance analyzer, a direct current stabilized supply, a nitrogen source, a coil kit, a pressure components and a base. The alternating current impedance analyzer is used to provide the alternating current impedance and the frequency parameter of the tested sample in different bias magnetic fields and under different pressure conditions; the alternating current impedance analyzer connects with the power supply of 220V and 50Hz; the delivered power of the direct current stabilized supply is 0-30V and 3A, and is used in enabling the coil A to produce the bias magnetic field in loading the required current; the nitrogen source is used to provide the required pressure of the tested sample. Through the testing of the alternating current impedance and the frequency parameter of the sample in different bias magnetic fields and under ...

Pyrogenic oxidation resistant nickel-aluminium-dysprosium coat bond material and preparation of hot screening coating

The invention discloses a high-temperature-oxidation-resistant nickel-aluminum-dysprosium thermal barrier coating bonding layer material, composed of 0.01 to 3 by atomic percent of dysprosium with a purity of 99.99%, 40 to 50 by atomic percent of aluminum with a purity of 99.999% and the balance nickel with a purity of 99.9999%. The dysprosium element in the melt bonding layer material mainly distributes along NiAl crystal boundary. A substrate with the nickel-aluminum-dysprosium bonding layer material is oxidized for 300 hours under 1200 DEG C, then the oxidation weight gain is about 0.5 to 1.5mg/cm<2>, the oxidation film on the surface of the substrate hardly drops off.

Plasma spraying method for manufacturing hyperthermia sealing coating

The invention discloses a BaLn2Ti3 plus XO10 plus Y seal coating spray preparation technological method by adopting atmospheric plasma. Due to the low melting point of the BaLn2Ti3 plus XO10 plus Y, the inventor proposes that: first, the power of the plasma spray gun is lowered to melt the material and keep the structure from decomposing; second, the distance between the powder feeding port of the spray gun and the plasma spray nozzle is widened, and the distance between the powder feeding port and the base plate is reduced, thus increasing the temperature of the base plate; third, the combination of the first one and the second one prevents the problems of seal coating decomposition and lower bonding strength of the coating interface due to the super-high flame temperature of the plasma or fast cooling speed of the base plate.

Preparation of nano multilayer high-resistance soft magnetic material by electronic beam gas phase deposition and method thereof

Nb-Ti-Si-Zn alloy material and preparation method thereof

The invention discloses an Nb-Ti-Si-Zn alloy material and a preparation method thereof. The alloy material is composed of 50-78at% of Nb, 1-20at% of Si, 16-28at% of Ti and 0.01-2at% of Zn, wherein the sum of atomic percentage composition of all components is 100%. The high-temperature alloy comprises niobium-base solid solution phase Nbss and niobium silicide phase Nb5Si3; at the temperature of 18-25DEG C, fracture toughness is 17-28MPa.m1/2, compressive yield strength is 1100-1800MPa at the temperature of 18-25DEG C, and compressive yield strength is 200-500MPa at the temperature of 1250-1350DEG C. The alloy material of the invention can be applied to an environment at the temperature of 1100-1400DEG C.

Thermal barrier coating service environment simulation device and method for stimulating environmental control

Method for preparing Ni3A1-based rhenium-contained moncrystal alloy with liquid metal cooling method

The invention provides a method for preparing Ni3A1-based rhenium-contained moncrystal alloy with a liquid metal cooling method, which concretely comprises the following steps of: firstly, preparing a liquid metal cooling medium; secondly, preparing a Ni3A1-based rhenium-contained alloy coupon; and thirdly, preparing a Ni3A1-based rhenium-free alloy seed crystal and the like. In the method, liquid metal (such as gallium and indium alloy or tin) is used as the cooling medium so that the cooling speed of a casting and the temperature gradient (200-350 K/cm) of a solid and liquid interface are increased; and a Ni3A1-based rhenium-contained moncrystal high-temperature alloy with small primary dendrite arm spacing, uniform tissues and low segregation is prepared with a seed crystal method through changing solidification process parameters such as heating temperature, pulling rate and the like, thereby obtaining Ni3A1-based rhenium-contained moncrystal alloy with excellent mechanical property ...

NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Nb

Composite multilevel Y2O3 powder crucible and method for producing the same with isostatic pressing technique

The invention discloses a composite multi-level Y2O3 crucible and a method for preparing the same by an isostatic pressing process. The multi-level Y2O3 crucible is prepared from multi-level Y2O3 powder and binder, wherein 20-100 ml of the binder is added to 1,000g of the composite multi-level Y2O3. During the preparation process, Y2O3 powders with different particle diameters are mixed, and small particles enter the voids of large particles during the mixing; therefore, the density of the Y2O3 crucible is increased, and the volume change when sintering at a high temperature is reduced. The prepared Y2O3 crucible can be used for smelting high-melting point active metal or alloy at 1,600-2,000 DEG C.

Thermal barrier coating failure criterion determination method and system

The invention discloses a thermal barrier coating failure criterion determination method and system, and relates to the technical field of thermal barrier coating detection. The method comprises the following steps: placing a thermal barrier coating sample in a terahertz time-domain spectroscopy system to obtain a time-domain spectrum signal of the thermal barrier coating sample, and performing fast Fourier transform on the time-domain spectrum signal to obtain a frequency-domain signal; then, heating the thermal barrier coating sample for a certain time according to a set temperature, cooling to room temperature, continuously repeating the operation until frequency domain information is obtained so as to generate a frequency spectrogram, and determining the positions of frequency spectrum characteristic peaks at different heating times; then, determining a change slope based on the positions of frequency spectrum characteristic peaks of different curves at different time; and finally, ...

Short-term high-efficient insulating paint

Material for dual active element co-doping thermal barrier coating bonding layer and preparation method

The invention discloses a material for a dual active element co-doping thermal barrier coating bonding layer and a preparation method, and belongs to the technical field of thermal barrier coatings. The preparation method utilizes an electron beam physical gas phase deposition method and a low-voltage plasma spray method to prepare a dual active elements Dy and Hf co-doping modified NiAl coating, wherein the content of Al in the coating is 40-55 at%; the content of Dy is 0.025-1.00 at%; the content of Hf is 0.025-1.00 at%; the balance is Ni. The method co-doping dual active elements Dy and Hf cooperates the active element functions of Dy and Hf effectively, restrains growth of holes in the interface of the coating and the oxidation film, enhances the binding force of the oxidation film and a base body, and reduces growth speed of the oxidation film; the method improves high temperature resisting circulating oxidizing property of the oxidation film remarkably.

Composite carbon-resisting coat and method for preparing the same on substrate

The present invention discloses a composite carbon-blocking coating material and a method for preparing a composite carbon-blocking coating on the substrate, the composite carbon-blocking coating material is composed of a transition layer and a carbon-blocking layer, the transition layer is SiC or Mo material and the carbon-blocking layer is Y2O3 material. The thickness of the transition layer is 40-120 mu m, and the thickness of the carbon-blocking layer is 100-250 mu m. The graphite crucible which is prepared with SiC-Y2O3 or Mo-Y2O3 composite carbon-blocking coating is smelted in the vacuum inducing smelting furnace for preparing the Ti-base alloy, when the smelting temperature gets to 1700-1750 DEG C the chemical reaction between the carbon element and Ti active metal in the graphite crucible is effectively prevented, the carbon pollution is avoided and the purity of the material being smelted is increased.

Plasma evaporation deposition lanthanide thermal barrier coating ceramic layer with long service lifer, high insulation performance and composite structure, and preparation method thereof

The invention discloses a plasma evaporation deposition lanthanide thermal barrier coating ceramic layer with a long service life, a high insulation performance and a composite structure, and a preparation method thereof, and belongs to the technical field of thermal barrier coating. The ceramic layer material comprises lanthanum zirconate or cerate; the thermal barrier coating comprises a bonding layer, a first ceramic layer and a second ceramic layer which are prepared on a base body, wherein the first ceramic layer adopts a YSZ coating; the second ceramic layer comprises the lanthanum zirconate or cerate; in the preparation method of the ceramic layer, the pressure of a vacuum chamber is lower than 1 mbar; through adjusting parameters of spraying electric power, current, gas flow rate, temperature of the basal body, powder feeding rate, spraying distance and the like, the YSZ coating layer and the lanthanide thermal barrier coating ceramic layer which are provided with microstructures ...

Pt Ni Al bonding layer doped with binary trace active elements and capable of being completely oxidation resisting at 1200 DEG C and preparation method thereof

The present invention discloses a Pt Ni Al bonding layer doped with binary trace active elements and capable of being completely oxidation resisting at 1200 DEG C and a preparation method thereof and belongs to the field of novel thermal barrier coatings and the preparation technologies. According to the invention, firstly, a Pt layer with the thickness of 5-10 microns is prepared on a nickel base monocrystal high temperature alloy matrix through the plating or the electron beam physical vapor deposition method, and then a NiAlHfZr coating with the thickness of 20-60 microns is deposited on the Pt layer through the electron beam physical vapor deposition method. The Pt layer reduces the interfacial holes and effectively improves the adhesion of an oxidation film; binary doping of Hf, Zr enables the NiAl coating surface to be smoother and denser and enables the oxidation film generated during the oxidation process on the coating surface to be straighter, especially with little oxidation ...

Method for making composite multi-stage fine powder Y2O3 copple by isostatic pressing process dry press

The invention discloses a method for producing a compound multilevel Y2O3 fine powder crucible by adopting the isostatic molding dry-press technique. The raw material of the compound multilevel Y2O3 fine powder crucible is the compound multiple Y2O3 fine powder; 40 to 80 grams of the second-stage Y2O3 powder material with a grain diameter between 0.5 and 10 mu m, 10 to 30 grams of the first-stage Y2O3 powder material with a grain diameter between 0.01 and 0.5 mu m, and 10 to 30 grams of the third-stage Y2O3 powder material with a grain diameter between 10 and 200 mu m are added into 100 grams of the compound multilevel Y2O3 fine powder. In the preparation technology, the Y2O3 fine powder with different grain diameters is mixed; in the mixing process, the grains with small diameters enter the gaps of great grains, thereby increasing the density of the compound multilevel Y2O3 fine powder crucible and reducing the change in volume in the high temperature sintering process; the compound multilevel ...

Method for testing tensile mechanical performance of TiAl-base alloy

The invention discloses a method for testing the tensile mechanical performance of TiAl-base alloy, comprising the steps of preparing raw materials, designing the size of a sample under test, processing and cutting the sample under test, processing the surface of the sample under test, loading and unloading the sample under test repeatedly and measuring the sample under test repeatedly. The sample which has no gap and is under the in-situ tension test by a scanning electron microscope (SEM) is designed and is ruptured under uniform stress to increase the plastic deformation region. The sample is tensed by being repeatedly loaded and unloaded with horizontal stress points on a standard mechanical performance curve. The method is particularly suitable for testing the tensile mechanical performance of the brittle material such as the TiAl-base alloy and can ensure that the morphology of the non-uniform plastic deformation of the brittle material such as the TiAl-base alloy which is tensed ...