264 results about "Intermetallic" patented technology

The invention provides a preparation method of an isotropic Ti2AlNb / TiAl-based interpenetrating composite material, and belongs to the technical field of intermetallic compound-based composite materials. The method comprises the following steps: firstly, designing a Ti2AlNb reinforcement framework of various TPMS configurations by utilizing implicit function modeling; then, carrying out anisotropy research on the TPMS configuration by utilizing finite element simulation; secondly, a Ti2AlNb reinforcement framework of a TPMS configuration is prepared through a selective laser melting (SLM) technology; and finally, the TPMS configuration Ti2AlNb / TiAl-based interpenetrating composite material is prepared through vacuum hot pressing sintering of HPS. Therefore, strong anisotropy of a traditional fiber reinforced composite material in mechanical property is avoided, good matching of strength, plasticity and toughness of the composite material is achieved, and a new thought and a new solution are provided for breaking through the application bottleneck of TiAl in spaceflight power system hot end components.

The invention provides a multi-component platinum-bismuth-based intermetallic ordered nanosheet as well as a preparation method and application thereof, and relates to the technical field of multi-metal alloy catalysts. The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the invention comprises a platinum element, a bismuth element and auxiliary metal elements, the auxiliary elements comprise 1-4 of an iridium element, a ruthenium element, an osmium element, a rhodium element, a tin element and a lead element, and the multi-component platinum-bismuth-based intermetallic ordered nanosheet has an intermetallic ordered structure and a two-dimensional nanosheet morphology. The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the invention is stable in structure, is applied to a fuel cell as a catalyst, and has excellent electro-catalytic performance, including formic acid oxidation electro-catalytic performance and alcohol oxidation electro-catalytic performance. The invention provides the preparation method of the multi-component platinum-bismuth-based intermetallic ordered nanosheet, the preparation condition is mild, the operation is simple, and the problems of catalyst agglomeration and the like caused by conversion from high-temperature calcination to an ordered phase are effectively avoided.

The invention discloses a preparation method and an application of an S and N co-doped small-nano-size high-entropy intermetallic compound. 2, 2 '-bithiophene is simultaneously used as a metal ligand and a sulfur source to be applied to synthesis of the high-entropy intermetallic compound, and sulfur atoms in the substance can form a complex with metal ions, so that a metal precursor can be uniformly and firmly distributed on the surface of a commercial carbon carrier, and formation of the high-entropy intermetallic compound in the subsequent annealing process is facilitated; the S and N co-doped high-entropy alloy intermetallic compound catalyst synthesized by the invention has excellent electrochemical performance in a fuel cell, and particularly has remarkable performance in the aspect of stability; wherein the mass activity of the S and N co-doped high-entropy alloy intermetallic compound PtCuNiCoFe / C-SN (PCNCF-SN) catalyst under the condition of 0.9 V (vs.RHE) reaches 2.7 A * mg <-1 > Pt, which is more than 12.3 times of that of commercial Pt / C; and in the aspect of stability, the mass activity can still be kept at 65% or above after 100000 circles of accelerated durability.

The invention relates to the technical field of catalysts, and particularly discloses a carbon-loaded nickel-molybdenum alloy catalyst, a preparation method thereof and application of the carbon-loaded nickel-molybdenum alloy catalyst in synthesis of amine compounds by selective reduction of nitro compounds. According to the carbon-loaded nickel-molybdenum alloy catalyst, Ni4Mo is used as an active site, and conductive carbon black is used as a carrier. The catalyst can be used for chemically and selectively hydrogenating nitro compounds into corresponding amine compounds under mild conditions (20-30 DEG C, 10 bar H2). The preparation method of the catalyst is simple, and the catalyst has good catalytic activity in selective reduction of nitro compounds. According to the catalyst, the activity and selectivity of a non-noble metal catalyst are adjusted through intermetallic alloying, and some insights can be provided for subsequent development of cost-effective catalysts.

The invention provides a core-shell structure magnetic abrasive and a preparation method thereof, and belongs to the technical field of magnetic abrasive preparation. According to the core-shell structure magnetic abrasive provided by the invention, through the arrangement of the core-shell structure, the magnetic abrasive has regular morphology and size, and irregular morphology and uncontrollable particle size caused by later processing are avoided; the transition bonding layer is arranged on the surface of the ferromagnet core, so that the hard phase is uniformly distributed on the surface of the ferromagnet, and the problem of uneven distribution of the hard phase is avoided; the transition bonding layer is connected with the hard phase through metallurgical bonding, the ferromagnet and the hard phase are tightly connected together, a magnetic channel is established through the formed intermetallic compound interface diffusion layer, the magnetic dilution effect of the hard phase is weakened, and the magnetic performance of the magnetic abrasive is remarkably enhanced.

Particular embodiments may provide an anode material, comprising a compound of formula Li2—X—Y, wherein: X and Y are each independently a metal atom or a metalloid atom; the anode material has a discharge potential of less than about 0.4 V vs. Li / Li+; and the molar ratio of Li:X:Y is 2:1:1.

The invention discloses an anti-oxidation packaging material for hot rolling of thermoelectric materials and a preparation method of the anti-oxidation packaging material, and relates to the technical field of new materials. The packaging material is of a three-layer composite tubular structure and sequentially comprises, from inside to outside, an anti-oxidation barrier layer which is a composite material with an Fe-Al intermetallic compound as a matrix and Y2O3 particles dispersed and distributed; the transition layer is a Ni-Cr-Fe-Mn-C series solid solution alloy with Ni as a matrix; and the structure supporting layer is made of microalloyed low-carbon bainite steel. The layers are metallurgically bonded through hot isostatic pressing, and then the hollow composite pipe is manufactured through cold drawing. The packaging material has excellent high-temperature oxidation resistance, good plastic deformation capacity and structural strength, can effectively isolate oxygen, coordinate strain and maintain overall integrity in the high-temperature hot rolling process, is suitable for protection and densification of Bi2Te3-based, PbTe-based and SiGe-based thermoelectric materials and the like, and remarkably improves thermoelectric performance and production consistency of the thermoelectric materials.

The invention belongs to the technical field of hydrogen fuel cell catalysis, and particularly relates to a self-supporting film based on intermetallic PtCu nanowire clusters and a preparation method and application thereof. The preparation method of the intermetallic PtCu nanowire cluster self-supporting thin film comprises the following steps: preparing a precursor solution, preparing a PtCu alloy nanowire cluster catalyst, preparing a self-supporting PtCu nanowire cluster thin film, and preparing the self-supporting PtCu nanowire cluster thin film coated with a SiO2 protective layer on the surface (soaking the self-supporting PtCu nanowire cluster thin film in a solution of tetraethoxysilane and formic acid, and drying the self-supporting PtCu nanowire cluster thin film to obtain the intermetallic PtCu nanowire cluster self-supporting thin film. The self-supporting PtCu nanowire cluster film coated with the SiO2 protective layer on the surface is subjected to heat treatment in a reducing atmosphere, and the heat treatment temperature is 400-800 DEG C. The self-supporting film provided by the invention is high in mechanical strength and mild in method condition, and the output power of the fuel cell is improved.

The invention provides a surface modification method of intermetallic compound powder. The surface modification method comprises the following steps: S1) pretreating the intermetallic compound powder; s2) performing high-frequency thermal plasma treatment on the intermetallic compound powder obtained in the step S1), and cooling; and S3) carrying out jet milling treatment on the intermetallic compound powder obtained in the step S2). The invention further provides application of the intermetallic compound powder subjected to surface modification in additive manufacturing. According to the surface modification method provided by the invention, micro powder of the powder is eliminated through high-frequency thermal plasma treatment, meanwhile, the sphericity degree of the powder is improved, high-speed collision and friction are generated among the powder and the surface roughness of the powder is increased by continuously combining jet milling treatment, so that the friction force of mutual contact among the powder is increased; and the powder blowing phenomenon in the electron beam selective melting forming process is inhibited, and the intermetallic compound powder which is difficult to melt and machine and suitable for the electron beam selective melting forming additive manufacturing technology is obtained.

The present invention provides a method for preparing an AgCuTi active solder, relating to the technical field of brazing materials. The preparation method comprises the following steps: pretreating a titanium foil, sequentially electroplating the surface with silver and copper, and diffusing the electroplated titanium foil in a vacuum environment at 600-700°C for 24 hours to obtain the AgCuTi solder. The method provided by the present invention can easily and conveniently prepare sheet- and strip-shaped AgCuTi active solders, and the active solders are less susceptible to the presence of CuTi intermetallic compounds while exhibiting good performance.

The invention relates to the technical field of dissimilar material connection, in particular to a method for regulating and controlling molybdenum steel brazed joint intermetallic compounds based on transition elements. According to the technical scheme, the method comprises the following steps that a transition element coating is deposited on the surface of a molybdenum matrix, transition elements are selected from one or more of Ti, V, Nb, Zr, Hf and Ta, and the molybdenum matrix and a steel matrix are brazed through boron-containing Ni-based brazing filler metal; in the brazing process, the transition element and the boron element preferentially react to generate a transition element boride, and therefore generation of MoNiBintermetallic compounds is inhibited. According to the method, the transition element coating is introduced, a brazing interface reaction path is actively intervened and reconstructed from the thermodynamic angle, and the problem of continuous generation of the brittle MoNiBintermetallic compound in the molybdenum / steel brazing joint is fundamentally solved.

The invention discloses a high-entropy alloy foil strip and a laser welding method of a titanium alloy and an aluminum alloy, and belongs to the technical field of dissimilar metal laser welding machining, the high-entropy alloy foil strip is used as a dissimilar metal welding middle layer, and the chemical formula of the high-entropy alloy foil strip is TiaFe2aCo2aNi2aCub; wherein a and b both represent atomic proportionality coefficients, b is a continuous adjustable real number parameter in a [1, 3] interval, and 7a + b = 10. The high-entropy alloy foil strip system has uniqueness in element selection, the proportion of Ti, Fe, Co, Ni and Cu is optimized by combining a Miema model and the metallurgical compatibility of base metal, a stable FCC solid solution can be formed in the welding process, the wettability and the structure stability can be improved, and therefore it is ensured that the performance of a welded joint is improved. A high-entropy alloy foil strip middle layer is introduced between two base materials, the high-entropy effect and the hysteresis diffusion effect are utilized, chemical components of a joint are regulated and controlled, generation of brittle Ti-Al intermetallic compounds in a weld joint is restrained, and therefore the mechanical property of the welded joint is improved.

The invention relates to an hcp phase ordered structure PtCu oxygen reduction catalyst and a preparation method thereof.The preparation method comprises the steps that carbon black and a Cu metal precursor are mixed, and a Cu / C precursor is obtained under the action of a reducing agent; pt and Cu / C are compounded through an impregnation method; the PtCu alloy loaded on the conductive carbon black is ordered through high-temperature gas reduction, and the loaded PtCu intermetallic compound catalyst is obtained. The catalyst nanoparticles prepared by the invention are uniformly distributed on the carbon carrier, the size of the nanoparticles is about 3-5nm, and the alloy structure is an intermetallic compound structure. The preparation process is simple, environment-friendly and suitable for large-scale batch production; the prepared catalyst has high oxygen reduction activity and stability, and can be directly applied to fuel cells.

The invention provides a titanium-steel cylindrical part construction method, which belongs to the technical field of metal material welding and comprises the steps of sample pretreatment, sample placement and diffusion welding. According to the method, appropriate parameters such as diffusion welding temperature, time and pressure are selected, the axial load of diffusion bonding equipment is applied to the upper end of the titanium alloy cylindrical part, flowing deformation of ceramic particles is restrained through the outermost hard alloy or graphite jacket, the axial load is converted into radial load through the fluidity of the ceramic particles, and the axial load is applied to the upper end of the titanium alloy cylindrical part. The radial load acts on a laminated structure interface through the titanium alloy layer from outside to inside, a transition solid solution can be formed at the structure interface, good interface combination is achieved, meanwhile, mutual diffusion of titanium and iron elements is prevented through the existence of the middle layer, and formation of brittle ferrotitanium intermetallic compounds is avoided. The welding joint obtained through the method has the advantages of being good in combination, free of pores and cracks and the like.

The invention relates to the technical field of magnesium alloy smelting, in particular to a Mg-Nd-Gd-Sb heat-resistant magnesium alloy and a preparation method thereof. According to the high-strength heat-resistant magnesium alloy containing rare earth Nd and Gd and the element Sb, on the basis that precipitation strengthening of rare earth intermetallic compounds containing Nd and Gd is used as a main strengthening mechanism, the Sb element is introduced to form a Mg3Sb2 high-temperature strengthening phase with high stability, on the premise that the total amount of rare earth is not greatly increased, the room-temperature and high-temperature strength performance indexes are improved to different degrees, and the high-strength heat-resistant magnesium alloy containing rare earth Nd and Gd is obtained. And good formability is maintained, and engineering application is easy to realize. The high-strength heat-resistant magnesium alloy containing the rare earth Nd, the rare earth Gd and the element Sb is excellent in high-temperature mechanical property, the tensile strength, the yield strength and the ductility of a heat treatment state material after casting at the temperature of 300 DEG C reach 230-245 MPa, 145-150 MPa and 5-7% correspondingly, and the requirements for the mechanical property of a light structural material in a high-temperature environment in the current fields of aerospace, rail transit and the like can be met.

The invention belongs to the field of Ti-Al intermetallic compound microstructure control, and particularly relates to a heat treatment method for preparing a uniform structure of a Ti3Al-based alloy. Firstly, Ti3Al-based alloy is subjected to heat preservation in a beta / B2 single-phase region or an alpha < 2 + > beta / B2 two-phase region, then cooling is conducted in a specific cooling speed region to obtain a subboundary-like net-shaped intermediate-state structure, then the Ti3Al-based alloy is subjected to heat preservation in the alpha < 2 + > beta / B2 two-phase region or an alpha < 2 + > O + beta / B2 three-phase region, and a uniform and low-length-width-ratio alpha < 2 > / O phase and small-size alpha < 2 > / O phase clustered microscopic structure is obtained. The method is simple and easy to implement and low in cost, the uniform alpha2 / O phase with the low length-width ratio and the small-size alpha2 / O phase cluster structure are obtained through the special subboundary-like net-shaped intermediate-state structure and subsequent heat treatment, and the problem that the alpha2 / O phase with the low length-width ratio and the small-size alpha2 / O phase cluster structure can be obtained only through deformation or complex heat treatment is solved.

The invention provides a preparation method of a cobalt-based intermetallic carbide material and application of the cobalt-based intermetallic carbide material in a preparation method of an electrocatalytic nitrate reduction electrolytic tank or a zinc-nitrate battery. The preparation method of the cobalt-based intermetallic carbide material comprises the following steps that cobalt chloride hexahydrate, indium chloride tetrahydrate, dicyandiamide and ketjen black are ground and mixed and then put into a tubular furnace for thermal annealing reduction, and the cobalt-based intermetallic carbide material is obtained. According to the method, cobalt-based intermetallic carbide material Co3InC0.75 powder is prepared into slurry, the slurry is dropped on carbon paper to be used for an electro-catalysis reaction, the material strengthens nitrate adsorption and water decomposition and inhibits a hydrogen evolution reaction, and therefore the performance of electro-catalysis of nitrate reduction to produce ammonia is improved.

The application discloses a brazing method of magnesium / aluminum dissimilar metals, which comprises the following steps: pre-electroplating nickel on a magnesium alloy base material, connecting the prepared magnesium alloy with a nickel plating layer and an aluminum alloy by using an ultrasonic-assisted brazing method, and using a brazing filler metal SAC305. The method prevents the generation of Mg-Sn intermetallic compounds (IMCs) in the process of magnesium / aluminum dissimilar metal low-temperature brazing using a Sn-based brazing filler metal. After welding, the position of the original nickel plating layer is changed into a Cu-Ni solid solution, and no large block-shaped Mg2Sn IMC is found in the brazing seam. Compared with a joint without a plating layer, the shear strength of the magnesium / aluminum dissimilar metal brazing joint based on the nickel plating layer is greatly improved, and the joint strength is strengthened by the diffusion of the nickel element into the brazing seam in the welding process. In addition, the corrosion resistance of the magnesium alloy can be improved by plating nickel on the surface of the magnesium alloy, and the service life of the magnesium / aluminum component is prolonged.

The present invention discloses a zinc-aluminum-magnesium coated steel sheet based on hot-dip plating and hot-forming technology, and its preparation method and application. The steel sheet is obtained by hot-dip plating and austenitizing and stamping under high-temperature conditions. The dipping solution for hot-dip plating is a Zn-Al-Mg dipping solution, and its composition is located in the zinc-rich corner of the Zn-Al-Mg ternary phase diagram, and the mass percentage meets the following requirements: the Zn content is 85-95 wt.%, the Al content is 4.5-8.5 wt.%, and the Mg content is 1-4.5 wt.%. After hot-dip plating, the steel sheet becomes a zinc-aluminum-magnesium coated steel sheet, which is composed of a steel sheet, a zinc-aluminum-magnesium coating-2, and an intermediate compound layer. Among them, the zinc-aluminum-magnesium coating contains Zn, Al, and MgZn2 phases; the zinc-aluminum-magnesium coating contains a Zn-Al two-phase eutectic and a Zn-Al-MgZn2 three-phase eutectic; the intermediate compound layer is an Fe-Al or Fe-Al-Zn intermetallic compound. After austenitizing, the zinc-aluminum-magnesium coated steel sheet becomes a steel sheet to be stamped, which is composed of a steel sheet and a zinc-aluminum-magnesium coating-3. The zinc-aluminum-magnesium coating-3 contains an α-Fe(Zn,Al) phase. As a corrosion-resistant material, the corrosion current density I corr is (1.20-1.68)×10 ‑5 A / cm 2 ; as a high-temperature mechanical material, the elongation is 38-54%.

The present invention belongs to the technical field of cemented carbide manufacturing, and discloses a cemented carbide with a cobalt-aluminum intermetallic compound CoAl as a bonding phase and a preparation method thereof. The cemented carbide is composed of a cobalt-aluminum intermetallic compound CoAl as a bonding phase and a hard phase WC. When the molar ratio of the added Co element and the Al element is 1:1 or 3:2, respectively, a cemented carbide with the intermetallic compound CoAl as a bonding phase is obtained. The mixed powder is evenly mixed by ball milling, and then spark plasma sintering is performed to finally obtain a dense cemented carbide with the cobalt-aluminum intermetallic compound CoAl as a bonding phase. The material composition of the present invention is reasonably designed, the preparation process is simple and controllable, the production cost is low, and large-scale industrial production and application are possible.

The invention discloses a friction stir welding method for aluminum-magnesium dissimilar alloy of a medium plate. Firstly, an aluminum alloy plate and a magnesium alloy plate which are equal in thickness (h) are selected, a protruding part is machined in the middle of a to-be-welded interface of the magnesium alloy plate, and meanwhile a concave part matched with the protruding part is prepared in the corresponding position of the aluminum alloy plate; then, the convex part of the magnesium alloy plate is accurately embedded into the concave part of the aluminum alloy plate to form a mechanical embedding structure; and finally, a stirring head is adopted for conducting friction stir welding along the path that the center line of the protruding part deviates towards the aluminum alloy plate side. According to the method, a material flowing track is forcibly regulated and controlled through geometric interlocking design, generation of brittle intermetallic compounds (IMC) is effectively inhibited in combination with an offset welding strategy, and the structural integrity and the mechanical property uniformity of the joint in the thickness direction are ensured.

Disclosed is a metal particle that includes a basal phase that contains Sn, an Sn—Cu alloy and Sb; and an intermetallic compound crystal that contains Sn, Cu, Ni, Ge, Si and Ti, included in the basal phase, the metal particle has a chemical composition given by 0.7 to 15% by mass of Cu, 0.1 to 5% by mass of Ni, 0.1 to 14% by mass of Sb, 0.001 to 0.1% by mass of Ge, 0.001 to 0.1% by mass of Si, 0.001 to 0.1% by mass of Ti, and the balance of Sn; the basal phase has a chemical composition given by 85 to 99.9% by mass of Sn, 5% by mass or less of Cu, and 0.1 to 14% by mass of Sb; and, at least parts of the basal phase and the intermetallic compound crystal form an endotaxial joint.

The invention discloses intermetallic compound nanoparticles as well as a preparation method and application thereof, and relates to the technical field of synthesis of nano catalytic materials. The preparation method is a molten salt method, takes a metal source as a raw material of metal in intermetallic electron compound nanoparticles and takes a first metal halide as molten salt, and specifically comprises the following steps: mixing the metal source, the first metal halide and a reducing agent to obtain a mixture; the mixture is subjected to heat treatment, so that the first metal halide is molten, after heat preservation is conducted for preset time, the temperature is reduced to the room temperature at the preset cooling rate, and the intermetallic electron compound nano-particles are obtained; wherein the metal source comprises at least one of metal oxide, metal hydroxide and metal salt; the reducing agent comprises at least one of alkali metal, alkali metal hydride, alkaline earth metal and alkaline earth metal hydride. The molten salt method is adopted, the intermetallic electron compound nano-particles with the large specific surface area are prepared, the catalytic performance is improved, and meanwhile the method is simple, low in cost and high in yield and has universality.

The embodiment of the present application relates to a kind of copper intermetallic compound porous materials and its preparation method and application, wherein, preparation method includes: metal Mg, Zn, Cu, M is mixed, is handled by induction smelting, and MgZnCuM alloy ingot is obtained;MgZnCuM alloy ingot is treated by spinning, and MgZnCuM precursor is obtained;MgZnCuM precursor is placed in gas phase de-alloying system and is treated by first vacuum heat treatment, and copper intermetallic compound porous material MgCuM is obtained;MgCuM has double continuous structure.The preparation method is simple and easy to operate, pore size is adjustable, and pore distribution is uniform, and the preparation process is environment-friendly and pollution-free.

The present invention discloses an embedded storage structure, a resistive random access memory and a method for preparing the same, belonging to the field of semiconductors. The present invention first prepares a first intermetallic dielectric layer on an interlayer dielectric layer of a first semiconductor structure; prepares a first metal circuit and a first electrode plate in the first intermetallic dielectric layer; continues to prepare a first barrier layer; uses an etching process to open the first intermetallic dielectric in an area on one side of the first electrode plate to form a first groove; deposits resistive random access material and conductive metal material in sequence; flattens and rests on the first barrier layer to obtain an embedded storage structure. The present invention prepares a resistive random access memory unit that changes the orientation of the electrode plate through a completely new process sequence, and prepares a resistive random access memory using this structure, making the resistive random access memory compact as a whole and compatible with the MOS process in the prior art. After simulation verification, the present invention has strong reliability and operability, and has a high production yield.

This invention relates to transition layer materials and welding processes for welding dissimilar steel and aluminum materials, belonging to the field of welding technology. The transition layer material for welding dissimilar steel and aluminum materials of this invention comprises a copper layer, a copper alloy layer, and a zinc alloy layer arranged sequentially; the copper layer is adjacent to the steel base material, and the zinc alloy layer is adjacent to the aluminum base material; the copper content in the copper alloy layer is 62.0%-64.0%; the zinc content in the zinc alloy layer is 89.0%-91.0%; the mass ratio of the copper layer, copper alloy layer, and zinc alloy layer is (0.9-1.1):(2.3-2.7):(1.8-2.2). By sequentially setting the copper layer, copper alloy layer, and zinc alloy layer between the steel base material and the aluminum base material, a gradual transition from the steel base material to the aluminum base material is achieved, effectively avoiding the formation of brittle Fe-Al intermetallic compounds during direct welding, and enhancing the mechanical properties and durability of the welded joint.

The invention belongs to the field of preparation of high-performance metal structure materials, and particularly relates to a method for preparing a Ti2AlNb alloy based on spherical titanium alloy powder. Commercial spherical titanium alloy pre-alloyed powder containing at least two elements of Al, Zr, Mo and V and pure niobium powder are selected as base materials, the spherical powder, the pure niobium powder and pure aluminum powder are evenly mixed according to the designed atomic proportion, a densification path of vacuum sintering or spark plasma sintering after cold isostatic pressing is adopted for preparing a consumable electrode blank, and the consumable electrode blank is prepared into a self-consumable electrode. And finally, a Ti2AlNb-based alloy cast ingot is obtained through vacuum self-consuming electric arc melting. According to the invention, not only is the technical bottleneck of inevitable gravity segregation in the smelting process of the Ti-Al intermetallic compound with high Nb content broken through, but also a brand new material preparation technical route with low cost, high performance and high stability is constructed; an industrialization feasible scheme is provided for solving the bottleneck problem of short-time high-temperature light structural materials in the aerospace field.

The present invention belongs to the technical field of porous materials, and discloses a Ni-Si intermetallic compound porous material and its preparation method and electrocatalytic application. The Ni-Si intermetallic compound porous material of the present invention is doped with Mo, Fe, Mn, Ti, W, Co, Cu or Cr elements, and comprises Ni: 30-80at.%, Si: 20-70at.%, Mo: 0-10at.%, Fe: 0-10at.%, Mn: 0-10at.%, Ti: 0-10at.%, W: 0-10at.%, Co: 0-10at.%, Cu: 0-10at.%, Cr: 0-10at.%. This kind of intermetallic compound porous material can be directly used in electrolysis of water, without the need to use carbon cloth, nickel foam or binder, and in order to further improve electrocatalytic activity, the present invention obtains more active sites and better catalytic activity by combining doping with a three-dimensional porous structure.

The present invention relates to an intermetallic dielectric layer, a manufacturing method thereof and a semiconductor device. The manufacturing method of the intermetallic dielectric layer comprises: obtaining a base structure formed with a metal structure, the surface of the metal structure being covered by an SRO layer; forming a silicon nitride layer with compressive stress on the surface of the SRO layer on the side wall of the metal structure; filling fluorine-containing silicon glass so that it covers the metal structure, the SRO layer and the silicon nitride layer as an intermetallic dielectric layer. The present invention sets a silicon nitride layer between the SRO layer and the fluorine-containing silicon glass. Since the silicon nitride layer has compressive stress, it can suppress the microscopic deformation of the metal structure caused by the thermal process (the expansion coefficient of the metal structure is larger than the expansion coefficient of the fluorine-containing silicon glass, so the microscopic deformation of the metal structure is large during the temperature change process). Furthermore, since the strength of silicon nitride is relatively large, the newly added silicon nitride layer can prevent the metal structure from being deformed and causing the SRO layer to break, and prevent the subsequent free fluorine ions in the fluorine-containing silicon glass from entering and corroding the metal structure to cause voids.

The invention discloses a post-treatment method for improving plasticity of a laser directed energy deposition Ti2AlNb intermetallic compound, and relates to a post-treatment method of an intermetallic compound. The problems that an existing Ti2AlNb alloy prepared through laser directional energy deposition is poor in plasticity, and traditional solid solution heat treatment is long in time are solved. According to the method, 340-420 A high-energy pulse current is selected for pulse current treatment, the interior of the alloy is rapidly heated after 12-18 s of instantaneous treatment, and the internal microstructure of the alloy is regulated and controlled through the heat effect and the non-heat effect of the pulse current; in the process that high-energy pulse current is introduced into the alloy, electron wind acts on atoms to promote element diffusion and phase change, so that a fine needle-shaped O phase is converted into a matrix phase within 12-18 s, dislocation motion is promoted, the internal stress in the alloy is released, the internal deformation resistance of the alloy is reduced, and the mechanical property of the alloy is improved. And the room-temperature ductility of the alloy is improved to 16.5% from 2% under the condition that the room-temperature tensile strength is not reduced.