90 results about "Titanium hydride" patented technology

The invention provides a high-wear-resistance and low-dilution gas shielded welding wire and a preparation method thereof, and belongs to the technical field of welding wire manufacturing. The welding wire consists of the following raw materials in parts by weight: 45-52 parts of iron; 18-22 parts by weight of an electrolytic nickel plate; 6-8 parts by weight of high-purity molybdenum powder; 4-6 parts by weight of nano tungsten powder; 3-4.5 parts by weight of a vanadium nitride alloy; 1.2 to 1.8 parts by weight of a niobium-iron alloy; 0.8-1.5 parts by weight of aluminum magnesium alloy powder; 0.3 to 0.6 part by weight of lanthanum cerium mixed rare earth; 0.15 to 0.25 part by weight of ferroboron alloy; 0.5 to 0.8 part by weight of metal silicon powder; 0.2 to 0.4 part by weight of a magnesium-calcium alloy; and 0.1-0.3 part by weight of titanium hydride powder. The hard framework is formed through gradient distribution of carbides such as molybdenum, tungsten and vanadium, the wear-resisting life is remarkably prolonged, melting mixing of base metal is reduced through the nickel-based alloy, the consistency of deposited metal components is ensured, free hydrogen is fixed through hydrogen trap phases such as titanium and niobium, and a moisture absorption path is blocked in combination with a surface passivation film.

The invention discloses a method and a system for improving the bonding capacity of a titanium-based material in superplastic forming / diffusion bonding, and belongs to the field of titanium alloy material heat treatment and hot working. In order to solve the problem that in the prior art, the connection quality is reduced due to hydrogen dissipation in the high-temperature SPF / DB process of titanium hydride alloy, hydrogen is mixed into an inert gas pressure source, the environmental hydrogen partial pressure is increased to inhibit hydrogen element loss, and therefore the diffusion connection capacity is improved. The method comprises the specific steps that a titanium alloy plate is subjected to hydrogen treatment, cleaned and sprayed with a separant, then the titanium alloy plate is placed in a mold to be vacuumized, argon-hydrogen mixed gas is introduced to serve as a pressure source, and forming and connecting are completed through rapid heating and pressure maintaining; and after the process is finished, carrying out vacuum annealing in a dehydrogenation temperature range to remove hydrogen elements, and introducing argon to accelerate cooling. The hydrogen element can be effectively reserved to improve the joint quality, meanwhile, the dehydrogenation step is simplified, and the method is suitable for the field of titanium-based material hot working, especially the technical field of titanium hydride alloy superplastic forming / diffusion bonding.

Active solder paste compositions for cladding ceramic with copper, methods for cladding ceramic with copper, and copper-clad ceramic materials. Active solder paste compositions comprise, on the basis of the total weight of the active solder paste composition, 1-20 wt % of a first metal powder and 75-94 wt % of a second metal powder, with the balance being a flux, wherein the first metal powder contains titanium hydride and the second metal powder contains a copper-phosphorus-silver alloy. The active solder paste compositions can not only decrease the silver content, but can also reduce the welding temperature. Moreover, the connection strength of Ti and Cu is further enhanced, and the welding strength is improved, such that the material is less prone to segregation.

The invention provides high-purity superfine titanium diboride and a preparation method thereof, and relates to the field of titanium diboride preparation. The method comprises the following steps: mixing boron oxide, titanium hydride, a carbon source, nano rare earth oxide and an organic solvent, and drying to obtain a mixture; in a vacuum environment, performing first roasting on the mixture to obtain a first roasted material; and in an oxygen-containing atmosphere, carrying out second roasting on the first roasting material to obtain the high-purity superfine titanium diboride. In the first roasting process, boron oxide, titanium hydride and a carbon source are completely melted and fully contacted, then further, the carbon source forms a carbon skeleton, the contact area between the melted boron oxide and titanium hydride and the carbon skeleton is further enlarged, liquid-liquid mixing and the increase of the contact area can reduce the reaction kinetic conditions, the reaction temperature is greatly reduced, and the reaction time is greatly shortened. The particle size of the generated titanium diboride is reduced, and the molten boron oxide and titanium hydride react on the porous carbon skeleton in a liquid-liquid form to generate the high-purity superfine titanium diboride.

Solid powder and an organic carrier are matched according to the mass ratio of (82-86): (14-18), silver powder and titanium dihydride powder which form the solid powder are matched according to the mass ratio of 96: 4, and a solvent, a thickening agent and a dispersing agent which form the organic carrier are matched according to the mass ratio of (91-95): (2-6): (1-5). According to the Ag-Ti soldering paste, silver powder and titanium dihydride powder serve as solid phases and are matched with a specific organic carrier, by optimizing the rheological property and the vacuum brazing technology, TiH2 is decomposed to generate active Ti atoms, the active Ti atoms react with AlN ceramic to generate a continuous TiN reaction layer, and high-strength and low-defect connection of an AlN ceramic base material and an oxygen-free copper metal copper layer is achieved; a traditional Cu element is abandoned in a soldering paste system, generation of a brittle phase is avoided, and the reliability of a connector under the extreme working condition is improved; when applied to preparation of the ceramic copper-clad plate, the film has the advantages of strong silk-screen printing adaptability, uniform film thickness and low voidage.

The invention relates to the technical field of titanium alloy preparation and machining, and particularly discloses a method for preparing a titanium alloy workpiece through near-net forming of titanium hydride powder. The method comprises the steps that after titanium hydride powder and intermediate alloy powder are mixed, cold press molding is conducted under 200-800 MPa, and a pressed blank is obtained; sintering the pressed blank and the mold for the first time at the temperature of 500-1200 DEG C, preserving heat for 10-30 minutes, and then cooling; and the pressed blank is taken out of the mold, secondary sintering is carried out at the temperature of 1200-1400 DEG C, cooling is carried out after heat preservation is carried out for 2-4 hours, and a titanium alloy workpiece is obtained. The method does not include the step of partially dehydrogenating the titanium hydride powder before cold press molding. According to the method, the problem that the titanium hydride pressed blank is easy to crack during demolding is fundamentally solved through the first sintering with the mold by utilizing the volume shrinkage effect in the dehydrogenation process, so that the product percent of pass is greatly improved, and meanwhile, the low hydrogen content (llt of a workpiece is ensured; 0.015%), high density (greater than or equal to 99%) and uniform components.

The application provides a preparation method of a high-performance porous titanium-based intermetallic compound filter and relates to the technical field of filter preparation.The method comprises sequentially performing titanium raw material hydrogenation, micron-sized titanium hydride powder preparation, mixed powder preparation, mixed powder dehydrogenation alloying, micron-sized alloy powder preparation, cold isostatic forming mold preparation of the porous titanium-based intermetallic compound filter, titanium-based filter compact preparation and porous titanium-based intermetallic compound filter preparation.The application uses off-grade titanium as a matrix raw material, adds alloying elements such as aluminum and iron, combines the hydrogenation-dehydrogenation process with high-energy ball milling, and then realizes near forming of the porous titanium-based intermetallic compound filter through cold isostatic pressing and vacuum sintering.The prepared filter has high porosity, uniform pore size distribution and excellent corrosion resistance, can be used stably for a long time in a high-temperature and strong-corrosion environment, can realize efficient and high-precision purification of titanium tetrachloride, and is beneficial to industrial large-scale production and popularization.

A preparation method of a specific pore size aluminum foam, comprising foaming, the foaming is adding a composite foaming agent and stearic acid in the tackified molten aluminum, and carrying out heat preservation foaming after stirring and dispersing, the composite foaming agent is titanium hydride as the main body, zirconium hydride and calcite as the adjuvant, and the mass ratio of titanium hydride, zirconium hydride and calcite is 5:1~2:0.5~0.8.In the application, TiH2, ZrH2 and calcite are used as the foaming agent, and the calcite is used in combination with stearic acid, so that the pore size structure and the uniformity of the pore distribution in the aluminum foam are controlled, the pore size is mainly distributed between 1~2mm, the pore size variation coefficient is 0.49, the porosity of the aluminum foam reaches 88.4%, the density retention rate of the material is between 108.2~120.4%, the structural stability is excellent, and the aluminum foam has obvious advantages as a heat and sound insulation material.The preparation process can be popularized to the preparation of aluminum-scandium alloy foam, so that the Sc distribution is promoted to be uniform, and the yield platform stress and the energy absorption efficiency are significantly higher than those of the pure aluminum foam.

The invention discloses a method for preparing a low-oxygen titanium alloy sheet from titanium alloy powder in a multi-element sequence control manner, which comprises the following steps: S1, granulation: mixing and granulating titanium alloy powder and an adhesive; s2, powder rolling is conducted, specifically, the powder particle raw materials are rolled, and a titanium alloy plate blank is obtained; s3, degreasing and dehydrogenation treatment; s4, oxygen control treatment, wherein the oxygen content in the titanium alloy sheet blank is controlled; and S5, sintering is conducted, specifically, the titanium alloy sheet blank is sintered at high temperature and used for closing internal pores of the material and densifying the blank. According to the process route, titanium hydride powder is creatively added into an adhesive for granulation, then powder rolling is carried out, and a thin plate or a coil is formed preliminarily. And then through a series of precise control procedures such as vacuum degreasing, dehydrogenation, oxygen control and sintering, impurities are effectively removed, the oxygen content and the hydrogen content are precisely controlled, the structure and performance of the thin plate are further optimized through hot rolling and cold rolling, and the problems that energy consumption is high and impurities are introduced after multiple times of rolling are successfully solved.

This invention relates to the field of ultraviolet shielding materials, specifically a method for preparing a TiH2 / lignin two-dimensional nanosheet composite material and its ultraviolet shielding application. First, a deionized aqueous dispersion of lignin is ball-milled and then freeze-dried under vacuum to obtain flake-like lignin. Then, TiH2 powder is ball-milled, dried, dissolved in an aqueous nitric acid solution, and acid-washed. After washing and drying, TiH2 powder is obtained, which is then dispersed and mixed with the flake-like lignin in an aqueous solution. The mixture is then sonicated, and the resulting suspension is separated into solids and freeze-dried to obtain the TiH2 / lignin nanosheet composite material. This invention uses ultrasonic treatment to composite lignin nanosheets and TiH2, avoiding the aggregation of lignin nanosheets. Simultaneously, TiH2 forms a uniform nanosheet structure, which is more conducive to the reaction of TiH2 with external free radicals to form TiO2, resulting in excellent overall ultraviolet shielding and antioxidant capabilities.

The invention discloses a method for reducing dehydrogenation sintering of high-purity titanium powder, which comprises the following steps: at the temperature of 500-700 DEG C and the vacuum degree of more than 0.1 Pa, moving titanium hydride powder upwards to the top and falling through a spiral stirring mechanism which is longitudinally arranged in a vertical dehydrogenation furnace until dehydrogenation is finished, and continuously carrying the titanium hydride powder upwards through the spiral stirring mechanism, and after reaching the top, the titanium hydride particles freely fall, the titanium hydride particles are always in a dynamic movement process to form dynamic dehydrogenation, the adhesion phenomenon among the titanium hydride particles in the process is reduced, the sintering agglomeration phenomenon is greatly reduced, and the yield of the titanium powder is greatly improved.

A composite ceramic substrate and method for producing the same. The composite ceramic substrate includes a ceramic substrate, a circuit board, and a composite adhered structure adhered to the ceramic substrate and the circuit board. The composite adhered structure includes a first active metal layer adhered to the ceramic substrate, a second active metal layer adhered to the circuit board, and a solder layer arranged between the first active metal layer and the second active metal layer. The first active metal layer includes titanium hydride. The second active metal layer includes tin, copper, and titanium hydride. The solder layer includes tin, copper, and titanium hydride.

The invention provides a novel graphene-silicon-titanium nano coating for concrete protection. The coating comprises an epoxy resin permeable primer, a graphene-silicon-titanium nano intermediate paint and a fluorocarbon finishing paint, the thickness ratio of the epoxy resin permeable primer to the graphene silicon-titanium nano intermediate paint to the fluorocarbon finish paint is 3: 12: 8; the graphene silicon-titanium nano intermediate paint comprises a component A1 and a component B1, the component A1 comprises the following raw materials in percentage by mass: 30-60% of elastic epoxy resin, 1-3% of graphene, 10-20% of titanium hydride, 5-15% of silicon dioxide, 1-3% of a silane coupling agent, 0.05-0.2% of a nano cerium oxide catalyst, 10-40% of a diluent and 0.1-0.3% of a defoaming agent; the component B1 comprises the following raw materials in percentage by mass: 30-60% of an epoxy curing agent and 30-80% of a diluent; the mass ratio of the component A1 to the component B1 is m (A1): m (B1) = (2-7): 1. The matching performance of the protective coating and a concrete base material is good, and a paint film is not prone to wrinkling, cracking and falling off in various severe environments.

The invention belongs to the technical field of grinding wheels, and particularly relates to an AMOLED display glass edging grinding wheel binding agent, an edging grinding wheel and a preparation method of the edging grinding wheel. The grinding wheel binding agent comprises, by mass, 50-60 parts of a Cu-Sn alloy metal phase, 20-30 parts of a hydrogenated butadiene-acrylonitrile rubber nano rubber phase, 5-10 parts of nano aluminum oxide reinforcing filler, 3-5 parts of a molybdenum disulfide lubricant and 2-3 parts of a titanium hydride sintering aid. The invention further provides a formula and a preparation method of the grinding wheel. According to the method, the defects of an existing process are overcome, a nano rubber phase of hydrogenated nitrile rubber is combined with a Cu-Sn alloy metal phase, a flexible composite binding agent with flexible buffering and rigid supporting functions is formed, and the effects of buffering grinding vibration and reducing edge cracking are achieved.

This invention relates to the field of new energy vehicle power battery manufacturing technology, specifically a fully automated laser welding and packaging process for lithium iron phosphate battery cells used in new energy vehicles. The process includes: S1. The cell shell is made of 6061 aluminum alloy containing niobium, yttrium, and lanthanum, sandblasted, then ultrasonically cleaned with an ethanol solution containing a silane coupling agent, and dried at 85-95℃; S2. The cover plate is made of 304 stainless steel containing 0.15-0.25wt% zirconium and 0.06-0.08wt% cerium, and the sealing groove is pre-cured with modified polyimide adhesive and then butt-fitted to the shell; S3. The weld seam is pre-coated with a nano-coating containing 0.1-0.3wt% titanium hydride, pulsed welded using a 1064nm fiber laser, and protected with a mixture of argon, helium, and nitrogen gas; S4. Post-weld annealing, ultrasonic treatment by immersion in a titanate aqueous solution, and finally vacuum drying. This process optimizes the shell and cover plate materials, resulting in stable welding quality, high weld strength, good corrosion resistance, improved cell sealing performance and long-term reliability, fully automated operation, and excellent production efficiency and product consistency.

The invention relates to the technical field of powder metallurgy, and discloses a preparation process of a high-performance titanium powder material. 5-10 parts of titanium dioxide; 10-14 parts of titanium hydride powder; 2-5 parts of waste aluminum powder; 0.5 to 1.5 parts of scrap iron; 0.2 to 0.5 part of vanadium powder; 2-3 parts of a nodulizing agent; 1-2 parts of a surface treating agent; 3-7 parts of a reducing agent; by combining the raw material formula with the preparation process, the high-performance titanium powder material which is high in sphericity degree, good in flowability, low in oxygen content, excellent in mechanical property and uniform in particle size distribution can be prepared, and by optimizing the raw material combination and the process flow, recycling of 100% of waste powder is facilitated, resource waste and carbon emission are reduced, and the method is suitable for industrial production. And the preparation process is innovatively optimized on the steps of raw material pretreatment, spheroidizing treatment, surface treatment and reduction treatment, so that the prepared titanium powder material has the advantages of high purity, high sphericity degree, uniform particle size, low cost and green circulation.

The present application relates to a kind of preparation method of titanium carbide fiber, belong to metallurgy and hard alloy preparation technical field.The present application uses titanium hydride as titanium source, carbon nanotube as carbon source, using molten salt method, in the tube furnace of argon protection, 700~900 ℃ reaction 3~5h, prepared fibrous titanium carbide, product is removed after washing other impurities and obtains high-purity titanium carbide fiber.Sodium chloride and potassium chloride binary salt are used as molten salt medium, which can effectively reduce the reaction temperature and reduce energy consumption.The preparation method of fibrous titanium carbide proposed in the present application has the advantages of low cost, simple process, low reaction temperature, short reaction time, etc.The prepared titanium carbide powder has high crystallinity and uniform particle size distribution.The salt can also be recycled and reused, reducing the synthesis cost and facilitating industrial production.

The invention discloses an SPS preparation method and application for sintering and connecting TZM and graphite by using titanium hydride powder in the field of connection of TZM / graphite dissimilar materials, and particularly relates to a TZM / graphite composite material obtained by performing sintering diffusion connection on the TZM and graphite dissimilar materials by using the titanium hydride powder as a middle layer material through an SPS technology. The method has the following advantages that the titanium hydride powder serves as an interlayer material, compared with existing used titanium powder or titanium foil, the titanium hydride powder is environmentally friendly and low in component content, the titanium hydride powder can release hydrogen and generate elemental titanium within the temperature range of 400-800 DEG C, oxidation of titanium can be reduced while a base metal oxide layer can be removed, interdiffusion and solid solution of interface Mo and Ti atoms are promoted, and the service life of the interface Mo and Ti is prolonged. And a good metallurgical bonding interface is formed through reaction with the graphite side, and the TZM / graphite composite material which is free of crack defects, high in interface bonding strength and good in durability is obtained.

The invention belongs to the field of heat treatment and hot working of titanium alloy materials, and particularly discloses a process optimization method and system for improving the superplastic forming limit of a titanium hydride alloy plate. According to the method, the stress state in the superplastic forming process and the staged cooling process are regulated and controlled, and the problem that the mechanical property of the titanium hydride alloy is degraded due to local enrichment of hydrogen elements in superplastic deformation is solved. The method comprises the following specific steps: hydrotreating a titanium alloy plate to improve plasticity; a superplastic constitutive equation is established through a uniaxial tensile experiment, and loading air pressure is optimized; applying an air pressure difference between the upper die and the lower die in the superplastic bulging to form a multi-axial stress state so as to uniformly diffuse hydrogen; and after forming, sectional cooling (slow cooling and rapid cooling) is adopted for efficient dehydrogenation. The method effectively relieves the hydrogen enrichment phenomenon, improves the forming limit, reduces the subsequent vacuum annealing step, has the advantages of being stable in process, energy-saving and efficient, and is suitable for manufacturing complex thin-wall components in the aerospace field.

The invention belongs to the technical field of powder metallurgy, and provides a titanium alloy powder particle uniformity control method which comprises the following steps: step 1, controllable hydrotreating; step 2, carrying out two-stage crushing on the obtained titanium hydride blocks; step 3, carrying out precision airflow crushing and grading integration, and feeding obtained intermediate crushed powder into a closed-loop airflow crushing and grading system to be treated, so as to efficiently generate powder with highly concentrated particle size distribution; fourthly, efficient multi-stage screening is conducted, the collected powder is subjected to final precision screening, an ultrasonic vibration screening system is adopted, three layers of screens are arranged in series, and titanium hydride powder with the uniform particle size is obtained; and step 5, vacuum dehydrogenation treatment. The problems that a traditional product is wide in particle size distribution and low in yield are solved.

The invention provides a manufacturing process of spherical titanium alloy powder, which comprises the following steps: mixing titanium hydride powder and an adhesive, internally mixing, granulating, primarily shaping, screening, drying, mixing with an active metal simple substance, performing vacuum degreasing and sintering to obtain a sintered block, and performing chemical corrosion, crushing, fine grinding and secondary shaping to finally obtain high-sphericity titanium alloy powder. According to the process, the sphericity degree of the powder reaches 50% or above in the primary shaping process and is further improved to 70% or above in the secondary shaping process, and the flowability, the filling density and the sintering uniformity of the powder are effectively improved. Meanwhile, active metal elementary substances are introduced in the vacuum degreasing and sintering process to serve as sacrificial agents, the dehydrogenation and deoxidation efficiency is improved, oxygen impurity residues are reduced, and the compactness and purity of titanium alloy products are improved. Besides, by accurately controlling the drying temperature, humidity and time and optimizing the temperature, the heating rate and the vacuum degree of each stage of vacuum degreasing sintering, the uniformity and the material performance of the sintered block are remarkably enhanced. The process is efficient, low in energy consumption and suitable for titanium alloy near-net forming, and has good industrial application prospects.

The present invention provides a method for producing titanium hydride powder suitable for use in active metal brazing filler metals, titanium hydride powder, a slurry, and an active metal brazing filler metal. [Solution] The method for producing titanium hydride powder of this invention is a method for producing titanium hydride powder containing TiH2 and used in active metal brazing materials, and includes a milling step in which a raw material powder containing TiH2 is wet-milled, and the titanium hydride powder obtained after the wet milling has a 90% particle size D90 of 7.00 μm or less as measured by laser diffraction / scattering method.

A ceramic composite substrate (100) and a method for producing the ceramic composite substrate (100) are provided. The ceramic composite substrate (100) comprises a ceramic plate (1), a printed circuit board (2), and a composite structure (3) adhering to the ceramic plate (1) and the printed circuit board (2). The adhering composite structure (3) comprises a first active metal layer (31), a second active metal layer (32), and a solder layer (33). The first active metal layer (31) contains an active metal material selected from the group consisting of a Group IV metal, a Group V metal, and titanium hydride. The Group IV metal is titanium, zirconium, or hafnium, and the Group V metal is vanadium, niobium, or tantalum. The second active metal layer (32) consists of titanium or titanium hydride. The solder layer (33) comprises tin and copper. The ceramic composite substrate (100) has a tensile strength of 100 N / cm to 340 N / cm.

The invention discloses a composite ceramic substrate and a manufacturing method thereof. The composite ceramic substrate comprises a ceramic substrate, a circuit board and a composite bonding structure for bonding the ceramic substrate and the circuit board. The composite bonding structure comprises a first active metal layer, a second active metal layer and a solder layer. The first active metal layer includes an active metal material, and the active metal material is at least one selected from the group consisting of Group 4 metals, Group 5 metals and titanium hydride. The Group 4 metal is titanium, zirconium, or hafnium, and the Group 5 metal is vanadium, niobium, or tantalum. The second active metal layer is made of titanium or titanium hydride. The solder layer includes tin and copper. The tensile strength of the composite ceramic substrate ranges from 100 N / cm to 340 N / cm. According to the composite ceramic substrate and the manufacturing method thereof, the problems that in an existing ceramic substrate manufacturing method, electromigration possibility is caused due to the fact that high-content silver is used, and the process cost is too high can be effectively solved.

The invention relates to brazing filler metal and brazing paste for boron nitride ceramic and nickel-based superalloy and a preparation method and application of the brazing filler metal and the brazing paste, belongs to the technical field of welding materials, and solves the problem that the boron nitride ceramic cannot be effectively connected with the nickel-based superalloy due to the fact that existing brazing filler metal cannot react with the boron nitride ceramic. The brazing filler metal comprises 70 wt%-90 wt% of nickel-based amorphous powder and 10 wt%-30 wt% of titanium-containing powder, and the titanium-containing powder is titanium hydride. According to the invention, the ratio of nickel-based amorphous powder to titanium-containing powder in the brazing filler metal is regulated and controlled, so that the interface reaction between the brazing filler metal and boron nitride is realized, and the melting point range of the brazing filler metal is controlled, so that boron nitride ceramic reacts with titanium to generate substances (TiN and TiB2) and structures which are beneficial to enhancing the interface bonding strength between the ceramic and the brazing filler metal; the performance of the nickel-based high-temperature alloy can be prevented from being reduced due to too high brazing temperature; by means of the brazing filler metal, effective high-strength connection between the boron nitride ceramic and the nickel-based high-temperature alloy can be achieved, and the requirements of extreme working conditions for materials are met.

The application provides a tungsten alloy material and a preparation method and application thereof, and the raw material of the tungsten alloy material comprises 90-93 wt% of tungsten, 0.1-1 wt% of an additive and a balance of a binder phase material in percentage by mass; the additive comprises any one or a combination of at least two of hafnium hydride, titanium hydride or zirconium hydride; the tungsten alloy material provided by the application has a tensile strength at room temperature of 1550 MPa or more, an elongation at room temperature of 10% or more and an impact toughness at room temperature of 80 J / cm 2 The above room temperature impact toughness is suitable for armor-piercing materials.

The invention provides a copper-plated composite molybdenum alloy wire and a preparation method thereof, and belongs to the technical field of molybdenum alloy materials, and the preparation method comprises the following steps: firstly, mixing molybdenum powder, La (OH) 3 powder, titanium dihydride powder and zirconium hydride powder, carrying out cold pressing, sintering, rolling, annealing, rotary swaging and drawing to obtain a molybdenum alloy inner core, and carrying out electrolytic polishing, alkali washing, rinsing and drying to obtain the copper-plated composite molybdenum alloy wire. The pretreated molybdenum alloy inner core is obtained; and activating the pretreated molybdenum alloy inner core, sequentially and continuously electroplating in a Ni composite plating solution, a Cu composite plating solution and a Zn-Co alloy plating solution to form a Ni composite base coat, a Cu composite plating layer and a Zn-Co alloy layer, and carrying out short-time thermal diffusion, phosphoric acid cleaning and drying under the protection of an inert atmosphere to obtain the copper-plated composite molybdenum alloy wire. The tensile strength can be improved, and the conductivity and the electrical discharge machining stability can be improved at the same time.

The invention relates to the technical field of electronic equipment protection structures, in particular to a lightweight foamed aluminum-based integrated structural part for an electronic equipment case. The lightweight foamed aluminum-based integrated structural part comprises a gradient foamed aluminum matrix, a bionic ventilation channel and a surface conducting layer. The silicon dioxide coating layer in the modified foaming agent can isolate water vapor to reduce the moisture absorption rate, and the coating layer is gradually decomposed at high temperature, so that the initial decomposition temperature of titanium hydride is increased, the gas production time is prolonged, and pore collapse caused by concentrated gas production is avoided; interface bonding among the modified binder, the reinforced phase and the aluminum powder is converted into chemical bonding from physical adsorption, so that the bonding force of the interface is stronger, and local fracture caused by stress concentration is avoided; a polyvinyl alcohol coating layer of microencapsulated sodium borohydride in the modified reducing agent isolates direct contact with a plating solution, so that the hydrolysis rate is reduced, the effective effect is prolonged, and doped sodium hypophosphite fills lattice defects through rare earth ions, so that the fluctuation range of the reduction rate is reduced.

The invention provides a silicon-based negative electrode material with a three-layer structure and a preparation method thereof, the three-layer structure is composed of a core layer, a middle buffer layer and an outer layer, the core layer is silicon nanoparticles, the middle buffer layer is formed by compounding silicon nitride and titanium nitride, and the outer layer is a conductive carbon protection layer. The preparation method comprises the following steps: S1, uniformly mixing silicon powder, titanium hydride powder and a carbon source to obtain a mixture; s2, heating the mixture obtained in the step S1 in an inert atmosphere to obtain titanium disilicide; s3, calcining the titanium disilicide product obtained in S2 in an ammonia or nitrogen atmosphere to obtain a compound of silicon nitride and titanium nitride; and S4, carrying out carbonization treatment on the product obtained in S3 to obtain the silicon-based negative electrode material with a three-layer structure.

The application belongs to the technical field of solar cells, and particularly relates to a solar cell with a titanium layer and a metal wire current lead-out structure and a manufacturing method thereof, and comprises the following steps: S1, providing a cell piece comprising a semiconductor region and a conductive film layer arranged outside the semiconductor region, and providing a polymer film with a plurality of parallel metal wires arranged on the surface; S2, printing titanium hydride paste outside the semiconductor region and the conductive film layer of the cell piece, and then performing heating to make the titanium hydride paste semi-solidified or physically gelled; S3, parallelly adhering the metal wires of the polymer film to the titanium hydride paste and contact connecting; and S4, then performing heat treatment. The application can form a current lead-out structure with a titanium layer and a metal wire as an electrode to replace fine grids and cancel main grids, and does not need to use silver paste material electrodes; meanwhile, the application has better conductivity and stability, and can effectively improve the conversion efficiency and reliability of the cell.