161 results about "Refractory metals" patented technology

The invention discloses a multi-component composite oxide dispersion strengthening molybdenum alloy and a preparation method thereof, and relates to the technical field of refractory metal powder metallurgy preparation. The molybdenum alloy comprises a molybdenum matrix and a Y-X-O composite oxide nano precipitated phase dispersed and distributed in the molybdenum matrix. The molybdenum alloy comprises the following components in percentage by mass: 1%-2% of Y2O3, 0.3%-1.2% of an active element X, 96.5%-98.7% of molybdenum and inevitable impurities, wherein X is selected from one of Ti, Zr and Hf; the Y-X-O composite oxide nano precipitated phase and the molybdenum matrix form a coherent or semi-coherent interface, and the interface mismatch degree is less than or equal to 5%. The molybdenum alloy has excellent high-temperature strength and creep resistance, and can be applied to the high-temperature fields of nuclear industry, aerospace and the like.

The invention relates to the technical field of nuclear fusion surface plasma W materials, in particular to nano rare earth oxide ceramic-Ti microalloy composite reinforced W powder, a composite material and a preparation method of the nano rare earth oxide ceramic-Ti microalloy composite reinforced W powder. The composite powder is of a nearly spherical core-shell hierarchical structure, and the particle size is 30-50 nm; according to the composite powder, refractory metal W serves as a matrix, nano rare earth oxide ceramic particles are evenly dispersed in matrix W crystal grains, Ti mainly forms an enrichment area on the surface of the matrix or a matrix / rare earth oxide interface in a simple substance or oxide mode, the phase interface structure is effectively improved, W crystal boundary migration and dislocation motion are hindered, W crystal grains are remarkably refined, and the composite powder is prepared. Part and W form semi-coherence, fine grain and interface strengthening and toughening are achieved, and a brand new thought and a technical method are provided for synergistically improving the strength and toughness of the W composite material. The composite powder is subjected to organic reduction synthesis and low-temperature reinforced sintering to prepare the composite material, the tensile strength at the room temperature reaches 500-610 MPa, and the ductility is 5%-8%.

The invention discloses a reversible metal 4D printing method based on hydrogel reversible deformation and a metal part, and belongs to the field of metal additive manufacturing. The method comprises the following steps: firstly, constructing a three-dimensional model comprising a hydrogel driving layer and a metal blank layer; respectively preparing hydrogel light-cured ink and metal or precursor slurry thereof; printing the two layers of materials sequentially or alternately by adopting a photocuring printer to obtain a composite green body; the hydrogel layer is dehydrated and shrunk through drying, the component is driven to generate preset shape deformation, the hydrogel layer absorbs water and expands through soaking, and reversible recovery of the shape of the component is achieved; and degreasing, selective reduction and sintering heat treatment are conducted on the component, and the compact final metal component is obtained. According to the invention, the independent hydrogel layer is used as a deformation driver, the dependence on the intrinsic phase change characteristic of a metal material is avoided, the material universality is extremely high, the method can be widely applied to 4D printing of various materials including refractory metal and high-reflection metal, and reversible control of shape change is realized.

The invention relates to the technical field of large steel casting manufacturing, and discloses a crusher rack set for mining machinery and a casting method of the crusher rack set. The rack set comprises a cast steel body and a functional gradient reaction framework which is arranged in the cast steel body in advance and forms metallurgical bonding. The framework is made of refractory metal alloy, and an A area and a B area are divided on the framework. The area A is arranged at the heat accumulation core of the casting and is provided with a strong reaction coating on the surface; the area B extends outwards from the area A, and the surface of the area B is provided with a high-thermal-conductivity ceramic coating. The method comprises the steps of preparing the framework, installing the framework in a casting mold cavity, and then carrying out molten steel pouring and heat treatment. In-situ forced nucleation is initiated at the core of the casting through the strong reaction coating of the area A, a heat conduction path from inside to outside is established by means of the high heat conduction coating of the area B, and sequential solidification of the casting is achieved, so that defects such as shrinkage porosity and shrinkage cavities are effectively transferred, the density and uniformity of the internal structure of the casting are improved, and the casting quality is improved. And the overall mechanical property of the rack set is improved.

The invention discloses a high-efficiency catalyst and a preparation and application method thereof, and relates to the technical field of nano carbon material preparation, the high-efficiency catalyst comprises the following components: an organic metal compound containing iron, cobalt and nickel, a refractory metal organic compound, a cocatalyst and a functional auxiliary agent, the catalyst is used for preparing the carbon nanotube by a floating chemical vapor deposition method, a high-temperature plasma CVD method or a plasma arc method, all components of the catalyst are uniformly mixed through melting granulation, the defect that the proportion is difficult to accurately control due to independent feeding is avoided, meanwhile, powder feeding can be cracked and evaporated in the subsequent carbon nanotube preparation process, and the carbon nanotube preparation efficiency is improved. The catalyst with higher concentration is obtained, and the preparation efficiency of the single-walled carbon nanotube is remarkably improved.

The invention discloses a copper metal complex and a preparation method thereof. The copper metal complex is prepared by mixing copper powder and refractory metal powder, adding a dispersing agent and graphite and carrying out compression and vacuum sintering. The outer layer of the complex structure is copper foil, the inner layer is uniform alloy powder, the complex structure can be used as intermediate alloy for subsequent smelting, the smelting temperature is remarkably reduced, element oxidation is inhibited, and the component uniformity is improved; the method is suitable for preparing the copper-based complexes of various high-melting-point and easily-oxidized elements.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

The application discloses a method for preparing high-purity superfine tungsten powder by series impurity removal and microwave calcination, and relates to the technical field of refractory metal powder metallurgy. The method uses 99% and below industrial-grade ammonium paratungstate as raw material, and sequentially performs pyrolysis, two-stage physical purification, ultrasonic synergic acidolysis deep purification, microwave uniform calcination and sectional reduction. Firstly, the ammonia solution-evaporation crystallization method and the chemical precipitation method are connected in series to realize deep impurity removal, and the chemical precipitation method is used to directly obtain a nano tungsten oxide precursor, so that the morphology of the tungsten powder is guaranteed for subsequent reduction; secondly, the microwave calcination process is introduced to realize fast and green and environment-friendly uniform heating, and the hard agglomeration of the precursor is significantly reduced; finally, the sectional reduction method is adopted to effectively block the CVT effect in the reduction process, and abnormal grain growth is avoided. The method solves the problems of incomplete purification, sintering agglomeration of the precursor during reduction and out-of-control reduction particle size in the prior art, and the prepared tungsten powder has high purity and small average particle size.

The application relates to the technical field of refractory metal material processing, in particular to a vacuum smelting system and method for high-purity molybdenum and a fiber-structure molybdenum material, the vacuum smelting system for high-purity molybdenum comprises a three-layer composite crucible, the vacuum smelting method for high-purity molybdenum comprises the following steps: step S1): under the condition of a vacuum degree of less than or equal to 5*10 ‑3 Pa, a three-layer composite crucible is used to perform consumable smelting on molybdenum raw materials; step S2): a directional solidification rate is controlled to be 8-12 mm / min, and a longitudinal temperature gradient is formed to be greater than or equal to 100 DEG C / cm; step S3): multi-stage plastic deformation is implemented on a solidified ingot, and a total deformation amount is greater than or equal to 90%; the fiber-structure molybdenum material is formed with a longitudinal continuous fiber structure in the material, a grain length-diameter ratio is greater than or equal to 10:1, a fiber diameter is less than or equal to 5 microns, hydrogen content is less than or equal to 5 ppm, oxygen content is less than or equal to 50 ppm, and a room-temperature tensile strength is greater than or equal to 780 MPa; the application can prepare high-purity fiber-structure molybdenum material, and improves the problem of insufficient axial performance caused by the isotropy of a traditional equiaxed crystal structure.

The invention discloses a preparation method of high-purity refractory metal spherical powder, which comprises the following steps: preparing high-purity refractory metal of which the initial shape is a block, cleaning and drying the refractory metal, smelting the refractory metal into alloy metal liquid, carrying out vacuum suction casting on the molten metal liquid, pouring a material into cooling water after suction casting is completed, and carrying out ingot casting and cooling, so as to obtain the high-purity refractory metal spherical powder. After the cast ingot is cooled, a metal bar is obtained, and finally the metal bar forms refractory alloy powder; the prepared powder is sprayed out through smelting atomization equipment, refractory alloy powder is put into a radio frequency induction plasma device, technological parameters are adjusted, and spherical powder is obtained; oxidation and impurity introduction of powder in the machining process can be effectively reduced through the radio frequency induction plasma device; when the refractory metal spherical powder is prepared, melting or spheroidizing can be achieved only when the metal powder reaches the specific temperature, the metal material can be rapidly and evenly heated through the high-frequency magnetic field effect of radio frequency induction heating, and temperature fluctuation is reduced.

The present invention relates to a set of foundry cores (1) comprising at least one refractory metal core (4), at least one ceramic core (2) and at least one fastening element (6) placed on the ceramic core (2) and / or on the refractory metal core (4), wherein the cores (2, 4) and the at least one fastening element (6) are rigidly connected to each other, wherein the set of cores (1) has a protective coating (10) covering at least part of the refractory metal core (4) and the at least one fastening element (6), and wherein the protective coating (10) comprises at least a first protective layer.

The invention discloses a high-strength ceramic metallization method and application thereof. The method comprises the following steps that metallized powder is provided, and the metallized powder is obtained by mixing and ball-milling the following powdery components including, by mass, 70%-75% of refractory metal, 6%-12% of Al2O3, 1%-5% of Mn, 6%-22% of SiO2 and 1%-7% of CaO; uniformly mixing the metallized powder with a binder to obtain metallized slurry; and printing the metalized slurry on the surface of an aluminum oxide ceramic substrate, drying, and sintering in a hydrogen furnace to form a metal layer with the thickness of 15-50 microns on the surface of the substrate. According to the technical scheme, the problems that an aluminum oxide ceramic energy transmission window is prone to sparking, breakdown and the like and the problems that a high-purity fine-grain aluminum oxide ceramic metalized layer is low in sealing strength, poor in compactness and the like are solved, and the obtained metalized aluminum oxide ceramic can be well applied to preparation of a high-power energy transmission window.

The application discloses a refractory metal-ceramic composite environmental barrier coating adhesive layer material, which is prepared by uniformly mixing HfO2 and Nb through mechanical crushing, and in the adhesive layer material, the mass percentage of HfO2 is 60% to 90%, and the mass percentage of elemental Nb is 10% to 40%. The novel composite environmental barrier adhesive layer material has simple raw material composition, good uniformity, high use temperature and effectively improves the service life of the environmental barrier coating.

The invention relates to an additive manufacturing technology of a refractory metal material, and provides an induction heating degreasing method for 3D pure tungsten printing, which comprises the following steps of: preparing a binder system by taking polystyrene and polyformaldehyde as main binders, polymethyl methacrylate as a secondary binder and stearic acid as a surfactant; a pure tungsten precursor is obtained through a powder extrusion printing technology, and a high-density blocky tungsten sample is prepared through a high-temperature sintering technology after induction heating degreasing. According to the method, the high-performance, high-density and high-uniformity tungsten material can be prepared through the method that the pure tungsten precursor is prepared through the binder capable of being rapidly thermally decomposed and then induction heating degreasing is conducted, the efficiency of traditional thermal degreasing is greatly improved, and it is ensured that the material stably works in the high-temperature and high-radiation environment; the material is suitable for the fields of aerospace, nuclear industry and high-temperature application.

The invention provides a preparation method of refractory multi-principal-element alloy powder reinforced by a complex-component ceramic phase, and relates to the technical field of refractory multi-principal-element alloy powder preparation. The method comprises the following steps that refractory metal powder and non-metal powder are added into a solvent and a binder, the mixture is put into a mechanical stirring device to be stirred, and a slurry suspension solution is obtained; micron-sized spherical powder aggregates are prepared through a spray granulation method; a radio frequency induction plasma spheroidizing mode is adopted for preparing refractory multi-principal-element alloy spherical powder reinforced by a complex-component ceramic phase; the preparation method further comprises the step of obtaining the refractory multi-principal-element alloy powder reinforced by the irregular-shaped complex-component ceramic phase in a ball milling mode. The prepared complex-component ceramic phase reinforced refractory multi-principal-element alloy is uniform in component, compact in structure, low in impurity content and controllable in particle size distribution, and the preparation method is simple, easy to operate, environmentally friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

The present invention relates to a method for manufacturing an R-Fe-B-based permanent magnet by grain boundary diffusion of a refractory metal alloy and a rare earth alloy, in which grain boundary diffusion of a light rare earth alloy containing a light rare earth element that is cheaper than an expensive heavy rare earth element can reduce manufacturing costs, and to an R-Fe-B-based permanent magnet manufactured thereby, and to an R-Fe-B-based permanent magnet manufactured thereby. According to the invention, crystal grain growth (coarsening) in the permanent magnet is effectively inhibited, the thickness of a Pr shell is reduced, and the Pr concentration around crystal grains is improved, so that the permanent magnet with enhanced magnetic performance (such as coercive force) can be produced.

The invention discloses a high-performance N-type skutterudite thermoelectric material barrier layer with a composite structure and a preparation method thereof, and belongs to the technical field of thermoelectric conversion. The preparation method comprises the following steps that a Mo target is installed at a radio frequency target position, a W target is installed at a direct current target position, a skutterudite wafer substrate is fixed to a substrate, and the substrate is heated and vacuumized; and the argon flow is set and introduced, bias voltage is started, radio frequency and direct current power supplies are synchronously started to pre-sputter the target material, then radio frequency sputtering of the Mo connecting layer and direct current sputtering of the W barrier layer are sequentially carried out, and the W-Mo composite barrier layer is prepared. The method is used for solving the technical problems that due to the limitation of the high melting point of refractory metal W, a compact tungsten barrier layer is difficult to prepare through a common sintering process, the diffusion capacity of barrier elements is reduced, mismatch of thermal expansion coefficients of the metal W and a skutterudite matrix is large, and the barrier layer is prone to failure in a thermal cycle service environment.

The application discloses a non-sliding refractory metal hot interpass wire drawing machine, which comprises a pay-off part, a main machine part and a take-up part; a pay-off assembly is arranged at the front end of the pay-off part; the main machine part is arranged on one side of the pay-off part; and the take-up part is arranged on the side, away from the pay-off part, of the main machine part; the technical key points are as follows: the fluctuation of the metal wire caused by internal and external factors during the operation of each drawing unit can be detected separately, the wire speed of each drawing unit is adjusted according to the fluctuation, the speed rebalancing and force rebalancing between the drawing units are realized at the first time, the metal wire cannot produce sliding friction during the drawing process, constant tension, constant wire speed, non-sliding and non-friction wire stretching are realized, the manufacturing defects of the traditional wire drawing machine are avoided, and therefore, the product quality is ensured, the yield is improved, the enterprise benefit is improved, meanwhile, the metal wires of all the drawing units are guided into the same heater through the guide wheels, the energy consumed by heating is greatly saved, and the non-sliding refractory metal hot interpass wire drawing machine has a good application prospect.

The application relates to a multi-component refractory metal carbide-Co composite powder and a preparation method of high-entropy ceramic composite material thereof, and belongs to the field of powder metallurgy. In the application, multi-component refractory metal oxides, cobalt oxides and carbon sources are mixed, vacuum carbothermal reduction is carried out at 1000-1300 DEG C, and a composite powder of uniformly dispersed refractory metal carbide and metal cobalt is generated in situ in one step. The reduction temperature is 200-500 DEG C lower than that of the same system without cobalt. The composite powder is formed, sintered in an Ar atmosphere at 1350-1500 DEG C and 2-10 MPa of air pressure, and a dense refractory metal carbide high-entropy ceramic-Co composite material is prepared. The sintering temperature is more than 400 DEG C lower than that required for sintering the corresponding carbide powder without cobalt. Through the introduction of cobalt, the preparation temperature is greatly reduced, the average grain size of the obtained composite material is less than 3 mu m, and the fracture toughness is more than one time higher than that of the same high-entropy ceramic material without Co. The application is suitable for high-performance cutting tools and wear-resistant parts, and has the advantages of energy saving and consumption reduction and high toughness.

This application discloses a high-durability composite spark plug electrode material, its preparation method, and its application. It belongs to the technical field of spark plug electrode material preparation. The electrode material of this invention consists of a core layer and a surface composite layer. The core layer is a dispersion-strengthened alloy with iridium as the matrix, doped with rare earth oxides and refractory metals, possessing high-temperature strength, creep resistance, and a short melting point. The surface composite layer is a gradient functional material, consisting of a transition layer, an intermediate functional layer, and a surface nanolayer from the inside out. This invention achieves a strong metallurgical bond and a smooth transition of performance between the core layer and the surface composite layer through the synergistic design of the core layer components, the optimization of the multi-layer gradient structure of the surface composite layer, and the use of a special preparation process. This significantly improves resistance to electrical erosion and chemical corrosion, reduces ignition voltage, ensures the ignition stability and durability of the engine under extreme operating conditions, improves combustion efficiency, and achieves increased power and reduced fuel consumption.

The utility model relates to special-shaped refractory metal wire automatic forming equipment which comprises a rotating disc (3), a plurality of raw material fixing clamps (2) arranged on the upper end face of the rotating disc (3) in the circumferential direction of the rotating disc (3), and an automatic feeding mechanism (1) arranged on the side edge of the rotating disc (3) in the circumferential direction of the rotating disc (3) and used for feeding raw materials; the bending mechanism (4) is used for bending one end of the raw material; the heating mechanism (5) is used for heating the head of the bent end of the raw material; the flattening mechanism (6) is used for punching the head of the bent end of the raw material; and the automatic discharging mechanism (7) is used for discharging special-shaped refractory metal wire finished products. According to the utility model, the existing two procedures are combined into one procedure, and manual forming is upgraded into automatic forming.

The application discloses a preparation method of niobium-tungsten alloy spherical powder and a 3D printing method thereof, and belongs to the technical field of refractory metal material preparation. The preparation method obtains a uniformly-composition ingot by smelting niobium, tungsten, molybdenum and zirconium refractory metal raw materials, forms a hydride powder by mechanical crushing after hydrogenation treatment, adopts plasma spheroidization technology to prepare the spherical powder, then dehydrogenates the spherical powder at 450-750 DEG C for 1-3 hours, and finally obtains low-oxygen niobium-tungsten alloy spherical powder with oxygen content lower than 120 ppm by adding magnesium powder and treating the spherical powder in an inert atmosphere at 800-1100 DEG C for 2-5 hours. Compared with a traditional process, the application innovatively places the spheroidization treatment before the dehydrogenation and oxygen reduction process, utilizes the relatively smaller specific surface area of the spherical powder to improve the deoxygenation efficiency, and realizes oxygen content control in combination with magnesium powder heat treatment. The application solves the problems of high oxygen content and low powder yield in the traditional process, and provides material support for high-performance niobium-tungsten alloy components in the fields of aviation, aerospace and nuclear power.

The cemented carbide substrate composite pretreatment method of the CVD diamond coating has two methods. The process steps of the first method are as follows: (1) acid-base two-step chemical etching treatment, (2) heat treatment. The process steps of the second method are as follows: (1) acid-base two-step chemical etching treatment, (2) filling of refractory metal powder or refractory metal carbide powder, (3) heat treatment. The first method solidifies the loose surface layer of the cemented carbide substrate after chemical etching through heat treatment, blocks the communication holes left by Co etching with the internal substrate, and improves the firmness of the surface layer WC grains. The second method fills the Co-removed cemented carbide substrate surface layer cavities and internal communication pores with refractory metal powder or refractory metal carbide powder, and then solid-phase sintering through heat treatment to form a relatively dense carbide surface layer and a roughened surface. Thus, both methods can improve the adhesion of the diamond coating.

The application provides a cermet composite material with a complete core ring structure, a preparation method and application. The preparation method comprises the following steps: forming a ceramic phase pre-solid solution powder, which has a single phase structure and does not contain oxides; ball-milling and mixing the ceramic phase pre-solid solution powder, a second refractory metal carbide ceramic powder and a metal adhesive phase powder; the second refractory metal is different from the first refractory metal; pressing into a blank, and sequentially performing vacuum sintering, partial pressure sintering and cooling to obtain the cermet composite material. The application promotes the complete solid solution of refractory elements into the ceramic phase to form a single phase structure solid solution, and then a cermet composite material with high densification is prepared through the combined process of vacuum sintering and partial pressure sintering; the method utilizes the modification of the ceramic phase and the synergistic combination of the sintering process to generate a complete core ring structure, effectively improves the interface bonding strength and reduces the loss of mechanical properties of the material caused by the uneven microstructure.

The invention discloses a low-temperature precision rolling method for a 7N-grade CVD high-purity tungsten plate, and relates to the technical field of ultra-pure refractory metal processing. The method comprises the following steps of S1, rare earth composite plasma grain boundary activation and purification treatment; S2, multi-stage shape-control and property-control rolling; S3, gradient low-temperature grain boundary deep purification; and S4, ultra-clean surface finishing and passivation packaging. The method is high in process compatibility, suitable for the CVD tungsten plate blank with the thickness of 5-20 mm, capable of rolling an ultrathin plate with the thickness of 0.3 mm to a plate with the thickness of 5 mm and wide in industrial application prospect.

The present application relates to the technical field of melting furnace, and provides an ECR ion source resistance furnace, which comprises a ceramic crucible, has a furnace mouth, and the inside of the ceramic crucible is provided with refractory metal; a heating coil is located at the periphery of the ceramic crucible, and a gap is formed between the heating coil and the ceramic crucible; and the heating coil is used to form a current loop to heat the ceramic crucible. The ECR ion source resistance furnace provided by the present application is characterized in that the heating coil is located at the periphery of the ceramic crucible and is connected with electric current, the heating coil is used to form a current loop to heat the ceramic crucible, and the refractory metal vapor is obtained; the resistance of the heating coil is relatively large compared with the tantalum crucible; therefore, the ECR ion source resistance furnace provided by the present application can greatly reduce the operating current of the resistance furnace, not only can reduce the influence of the strong magnetic field of the ECR ion source on the resistance furnace, avoid deformation, and improve the service life of the resistance furnace, but also can simplify the power supply and other auxiliary equipment.

This invention relates to the field of high-temperature protection technology for refractory metals, and discloses an ultra-high temperature anti-oxidation composite coating for tantalum-tungsten alloys and its preparation method. Addressing the challenge of severe oxidation and "pulverization" of tantalum-tungsten alloys above 600℃, this invention designs a two-layer gradient composite structure coating. The inner layer forms a dense transition zone on the surface of the tantalum-tungsten alloy substrate in situ using an embedding process, with high-melting-point silicides and borides as the main phases. The outer layer uses a composite slurry prepared from HfB2, ZrB2, TaSi2, HfSi2, and Y2O3-stabilized zirconium oxide (YSZ) as raw materials, which is then sprayed and sintered at high temperature to form a dense, erosion-resistant ultra-high temperature anti-oxidation host layer. Through the gradient design of composition and structure, this invention achieves excellent thermal expansion matching between the coating and the tantalum-tungsten substrate. This composite coating enables tantalum-tungsten alloys to effectively serve for over 400 seconds in a static oxidation environment at 2300℃ and possesses good thermal shock resistance, thus expanding the application range and service limit of tantalum-tungsten alloys in ultra-high temperature fields.

The invention discloses a high-entropy rare earth oxide diffusion-resistant layer material for refractory metal and a preparation method thereof, the high-entropy rare earth oxide (Dy0. 2Ho0. 2Er0. 2Tm0. 2Yb0. 2) 2O3 powder with ultrafine grains and a porous communication structure is prepared by using multi-component soluble salts of Dy, Ho, Er, Tm and Yb as raw materials through a liquid-phase combustion driving reaction, the powder is prepared into slurry, the slurry is spin-coated on the surface of a Mo or Nb matrix to form a diffusion-resistant layer, and the diffusion-resistant layer material is prepared into a high-entropy rare earth oxide (Dy0. 2Ho0. 2Er0. 2Tm0. 2Yb0. 2). And finally, synchronous spark plasma sintering is carried out on the base body, the diffusion-resistant layer and the coating, so that compact solid phase combination is achieved, and an integrated double-layer protection structure is constructed. The prepared diffusion-resistant layer has ultra-fine grains and structural thermal stability, the deep diffusion of the Si element in the outer layer coating to the refractory metal matrix at the temperature of 1600 DEG C can be remarkably inhibited, silicification embrittlement, matrix pulverization and structural failure are effectively avoided, and the diffusion-resistant layer has the advantages that the diffusion-resistant performance is good; the invention provides a refractory metal surface long-term protection technology which is controllable in structure, stable in interface and suitable for an extreme high-temperature environment.

Disclosed is a method for processing the splash product of femtosecond laser ablation of metal, which comprises the following steps: spraying a metal on a glass sheet to form a metal spraying surface i The test is carried out under different conditions of the distance between the sample surface, and the splashes are collected; the morphology and distribution of the collected splashes on the three glass sheets are observed under a high-resolution SEM, and the number and distribution of Si elements and Mi metal main elements are analyzed by using an EDS element area scanning method; the number and distribution information of the laser ablation splashes of the Mi sample collected on the glass sheet are obtained; the divergence angle β of the laser ablation spray beam is determined; the number SUM of the collected metal splashes is determined; and the particle size distribution N(μ,σ) of the collected metal splashes is determined. The method can effectively collect the splashes generated in the process of femtosecond laser ablation of refractory metal, analyze the distribution characteristics, is simple to collect, can obtain much information, and has high analysis precision.