856 results about "Titanium carbide" patented technology

The invention relates to the technical field of aluminum alloys, in particular to a high-fluidity corrosion-resistant aluminum alloy material for laser cladding as well as preparation and application of the high-fluidity corrosion-resistant aluminum alloy material. The material comprises the following components in percentage by mass: 3.12%-5.34% of nickel, 4.24%-6.76% of molybdenum, 6.54%-8.12% of cobalt, 10.45%-14.49% of silicon, 5.65%-8.45% of a functional additive, 1.25%-2.45% of cerium oxide, 3.46%-7.42% of yttrium oxide, 3.45%-7.58% of lanthanum oxide and the balance of aluminum, the functional additive is titanium carbide doped with Ti < 3 + >. The aluminum alloy material has high flowability during laser cladding and is well combined with a matrix, and related properties such as wear resistance, high temperature resistance, corrosion resistance and oxidation resistance of a coating formed by the aluminum alloy material are sufficiently uniform due to the high flowability of the aluminum alloy material.

The invention provides a polysilazane green special refractory ceramic coating and a preparation method thereof, and belongs to the field of ceramic coatings. The ternary core material composed of titanium carbide, zirconium boride and silicon nitride provides high hardness, oxidation resistance, thermal shock resistance and excellent thermal stability; the silicon dioxide-aluminum oxide composite shell layer remarkably improves the oxidation resistance and reliability of the coating through the synergistic oxidation resistance and crack self-repairing function; the multi-metal oxygen cluster network endows the coating with excellent electrical conductivity, thermal conductivity and corrosion resistance; the intercalated montmorillonite enhances the crack resistance and oxidation resistance through a layered structure and embedded active ions; and the boron nitride coated vanadium carbide particles provide lubricity, oxidation resistance and wear resistance. Through collaborative optimization of multiple components, the comprehensive performance of the coating is comprehensively improved in the aspects of oxidation resistance, thermal conductivity, interface stability, high-temperature performance, mechanical performance and the like, so that the coating shows excellent long-term stability and functionality in an extreme environment.

The invention provides a surface cubic-phase-rich functional modified hard alloy and a preparation method, and belongs to the technical field of hard alloy cutter materials. According to the method, tungsten carbide is subjected to yttrium doping treatment, boron-containing titanium carbide and cobalt-molybdenum composite powder are used together, a nitriding sintering process is combined, diffusion and permeation of nitrogen atoms are promoted, the microstructure of the alloy is regulated and controlled, enrichment of a cubic phase on the surface of the alloy is achieved, and the surface-rich cubic phase functional modified hard alloy is obtained; the Vickers hardness and the heat conductivity coefficient of the hard alloy material are effectively improved, and meanwhile the friction coefficient of the material is reduced; the surface layer rich cubic phase of the modified hard alloy material is provided with the functional gradient layer, the binding force of a coating of a tool material prepared from the modified hard alloy material and a matrix can be improved, and therefore the service life of the tool material is prolonged.

The invention discloses a rare earth oxide modified high-entropy hard alloy and a preparation method thereof. A high-entropy hard phase (high-temperature calcination), a high-entropy binding phase and rare earth oxide are adopted, grinding, pressing and air pressure sintering at the temperature of 1450-1550 DEG C are conducted, and the high-entropy hard phase is prepared from tungsten carbide, titanium carbide, zirconium carbide, yttrium carbide, manganese carbide, chromium carbide and molybdenum carbide; the high-entropy binding phase comprises the following components: cobalt and a CoCrFeNi-series high-entropy alloy; and the component of the rare earth oxide is Y2O3 or Nd2O3. The prepared rare earth oxide modified high-entropy hard alloy has the advantages of high strength, high compactness, high hardness, high wear resistance and the like.

The invention relates to the technical field of porous adsorption materials, and discloses a porous adsorption material for organic waste gas purification and a preparation method thereof. Comprising the following steps: ultrasonically dispersing modified titanium carbide MXeneC in ethylene glycol, adding a palladium acetate solution, uniformly stirring, heating to 150-155 DEG C, reacting for 2-2.5 hours, cooling to room temperature, filtering, washing with deionized water and ethanol, and performing vacuum drying at 70 DEG C for 12 hours to obtain the porous adsorption material.

The invention relates to a ratiometric fluorescent molecularly imprinted polymer, a paper-based sensor and preparation and application thereof, and relates to the technical field of food safety detection. The preparation method comprises the following steps: uniformly mixing a functional monomer acrylamide, a template molecule fleroxacin, an initiator, modified SiO2 nanoparticles and a cross-linking agent A to obtain a mixture, then adding a binuclear Eu complex, a boron-nitrogen-doped titanium carbide two-dimensional layered material, a cross-linking agent B and acetic acid, initiating a polymerization reaction, and removing the template molecule to obtain the composite material. The ratio fluorescent molecularly imprinted polymer is obtained. The molecularly imprinted ratiometric fluorescent paper-based sensor can specifically recognize fleroxacin, can be used for detecting fleroxacin residues in meat products, and provides assistance for the development of a food rapid detection technology.

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The invention discloses an Al-Ti-C-Ce intermediate alloy with titanium carbide as a Ti source and a C source and a preparation method and application thereof.The preparation method comprises the steps that titanium carbide powder and aluminum powder are mixed and subjected to ball milling to obtain core-shell structure composite powder with TiC coated with Al, the core-shell structure composite powder is subjected to compression molding to obtain prefabricated blocks, the prefabricated blocks are pressed into the bottom of an aluminum melt in batches through a graphite bell jar, and the aluminum melt is subjected to heat treatment to obtain the Al-Ti-C-Ce intermediate alloy with the Ti source and the C source. The preparation method comprises the following steps: adding an Al-30Ce intermediate alloy, carrying out first heat preservation at 760-850 DEG C, cooling to 700-750 DEG C, adding the Al-30Ce intermediate alloy, carrying out second heat preservation, deslagging and refining, and pouring into a mold to obtain the Al-Ti-C-Ce intermediate alloy; according to the Al-Ti-C-Ce intermediate alloy provided by the invention, A356 alloy grains are refined to 106 microns (ASTM 5 level), and a low-content system can still maintain the refining level that the grain size is smaller than 120 microns.

The invention discloses preparation and application of carbon nitride / titanium carbide / amidoxime-based gel, and relates to preparation and application of a carbon nitride composite titanium carbide composite amidoxime-based hydrogel material. The invention provides the preparation method of the amidoxime-based hydrogel which is simple in synthesis, high in adsorption speed and high in efficiency. The design of the hydrogel material with high-speed uranium adsorption and green uranium circulation has important significance for realizing seawater uranium circulation, wherein the adsorption and desorption functions and the design of the mechanism thereof are key. According to the preparation method, the two-dimensional PAO / TiC / CN hydrogel is prepared by compounding PAO nanoparticles with a selective adsorption function and a two-dimensional TiC-CN photocatalyst. The hydrogel has a porous structure and cannot be damaged after being soaked in water for more than six months.

The invention discloses a graphene modified high-entropy alloy particle reinforced titanium-based composite material and a preparation method and application thereof. According to the composite material, titanium or a titanium alloy serves as a titanium matrix, and graphene is modified on the surface of a high-entropy alloy and serves as a reinforced phase together with the high-entropy alloy to be distributed at the grain boundary of the titanium matrix. In the microstructure of the material, the surface of the high-entropy alloy is modified with graphene, the interface of the high-entropy alloy and a titanium matrix and the solid solution degree of the high-entropy alloy in the titanium alloy matrix are regulated and controlled, and the graphene reacts with the matrix to generate titanium carbide to jointly reinforce the titanium alloy matrix with the high-entropy alloy. According to the preparation method, the graphene is modified on the surfaces of the high-entropy alloy particles by adopting a three-dimensional rotary mixing method, the problem that impurities are easily introduced in a conventional ball milling method is solved, and the graphene-modified high-entropy alloy particle reinforced titanium-based composite material block is obtained through sintering or laser 3D printing forming. The material has high strength and high plasticity, has excellent comprehensive mechanical properties, and can be applied to the fields of aerospace, ships and naval vessels and the like.

The invention provides dual-response antibacterial repair-promoting injectable hydrogel as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. Two-dimensional titanium carbide (TiO2 (at) MXene) with the surface modified with titanium dioxide and a bioactive substance are introduced into a hydrogel matrix to serve as functional additives, TiO2 (at) MXene is a photo-thermal and ultrasonic response material, can emit heat under 808 nm near-infrared (NIR) light irradiation and low-intensity pulsed ultrasound (LIPUS) stimulation, and can generate reactive oxygen species (ROS) for sterilization under LIPUS stimulation; when the temperature of the hydrogel is increased, the bioactive substances can be slowly released from the hydrogel, and cell proliferation and tissue repair are promoted. The hydrogel provided by the invention can be coated on the surface of skin or injected under soft tissue, so that the functions of resisting bacteria in the early stage of inflammation and promoting tissue repair in the later stage are realized.

The invention discloses a preparation method of recombinant collagen nano-composite hydrogel for repairing wounds infected by multiple drug-resistant bacteria, which comprises the following steps: binding copper porphyrin pi-pi on titanium carbide nanosheets to form MXene coated CuTCPP nanoparticles, and carrying out amidation reaction on 3-aminophenylboronic acid and recombinant collagen to obtain the recombinant collagen nano-composite hydrogel for repairing wounds infected by multiple drug-resistant bacteria. MXene coated CuTCPP is doped into a modified recombinant collagen system and mixed with a polyvinyl alcohol solution, and the recombinant collagen nano-composite hydrogel is prepared. The self-healing property endowed by the dynamic cross-linking characteristic of the phenylboronic acid ester bond in the composite hydrogel disclosed by the invention can be highly adapted to irregular wounds; the nano particles with the heterojunction structure can be combined with photothermal therapy and photodynamic therapy to efficiently sterilize wounds; the hydrogel has the antibacterial property and the property of promoting wound healing, and can comprehensively and efficiently treat wounds infected by multiple drug-resistant bacteria.

The invention belongs to the technical field of protection. The invention provides a D3O-based protective layer structure and a preparation method thereof. The D3O-based protective layer structure comprises an inner layer, an inner tube bundle layer and an outer layer which are sequentially arranged in parallel from bottom to top, the inner layer comprises a polyester fabric and an organic silicon resin based nano titanium boride and titanium carbide composite coating coated on the polyester fabric; the internal honeycomb-shaped tube bundle layer comprises a honeycomb-shaped frame body formed by a thermoplastic elastomer and a filler filled in the frame body, and the filler is a D30 material; and the outer layer is a butyl rubber layer. The single protective property of a traditional protective layer is changed, the performance of multiple composite materials is combined, the protective layer with multiple functions of wear resistance, softness, hardness, elasticity and the like is formed, and the protective layer has the performance of dispersing impact force, absorbing and buffering impact kinetic energy and preventing friction and can be applied to preparation of facilities or protective tools directly facing human body protection and the like.

The invention belongs to the field of preparation of a lithium ion battery positive electrode material, and particularly relates to an organic metal framework coated lithium cobalt oxide positive electrode material as well as a preparation method and application thereof. According to the scheme, a lithium cobalt oxide material, methanol, dimethyl imidazole cobalt, titanium carbide and sodium dihydrogen phosphate monohydrate are mixed according to the mass ratio of 1: (0.070-0.080): (0.001-0.002): (0.001-0.003): (0.001-0.002) and sintered, and the lithium cobalt oxide positive electrode material coated with the organic metal frame is obtained. According to the scheme, by utilizing the synergistic effect of a metal organic framework coating layer formed by pyrolysis of dimethyl imidazole cobalt, a three-dimensional conductive network constructed by titanium carbide and a phosphate interface layer, the mechanical strength of the coating layer is synergistically improved, lithium ion diffusion is accelerated, the internal resistance of the battery is reduced, the side reaction of an electrode / electrolyte is reduced, and the volume expansion of lithium cobalt oxide and cobalt dissolution are inhibited; and the high-temperature cycling stability and the rate capability of the lithium cobalt oxide battery are obviously improved. Meanwhile, the invention also provides an application of the organic metal framework coated lithium cobalt oxide positive electrode material in a battery.

The invention relates to a superfine hard alloy cutter and a preparation method thereof, and belongs to the technical field of hard alloy products, and the preparation method comprises the following steps: carrying out ball milling and sieving on tungsten carbide powder, titanium carbide powder, modified cobalt powder and reinforced composite powder to obtain hard alloy powder; and the hard alloy powder is subjected to spark plasma sintering and then subjected to vacuum heat treatment, and the superfine hard alloy cutter is obtained. According to the technical scheme, a vanadium source, a yttrium source and a cobalt source are mixed through a spray conversion method to prepare modified cobalt powder; nano particles and a reinforcing material are combined through electrostatic adsorption to prepare reinforced composite powder; the modified cobalt powder and the reinforced composite powder not only can inhibit the growth of tungsten carbide grains, but also effectively improve the hardness, bending strength and fracture toughness of the hard alloy, further improve the mechanical property, thermal stability and wear resistance of the superfine hard alloy cutter, and generally improve the comprehensive performance of the superfine hard alloy cutter. And the service life is prolonged.

This invention discloses an Al-Ti-C-Ce master alloy using titanium carbide as both Ti and C sources, its preparation method, and its application. Titanium carbide powder is mixed with aluminum powder and ball-milled to obtain an Al-coated TiC core-shell composite powder. The core-shell composite powder is pressed into preforms. These preforms are then pressed into the bottom of molten aluminum in batches using graphite bell jars. The mixture is first held at 760-850℃, then cooled to 700-750℃. An Al-30Ce master alloy is then added, followed by a second holding period. The mixture is then slag-removed and refined, and finally cast into a mold to obtain the Al-Ti-C-Ce master alloy. The Al-Ti-C-Ce master alloy provided by this invention refines the grain size of A356 alloy to 106 μm (ASTM grade 5), and even in low-content systems, a grain size refinement level of less than 120 μm can be maintained.

The invention provides a double-layer quick-drying moisture-permeable high-emission refrigeration film as well as a preparation method and application thereof. The double-layer quick-drying moisture-permeable high-emission refrigeration film comprises a hydrophilic layer and a hydrophobic layer, wherein the hydrophilic layer comprises titanium carbide and polyurethane, the hydrophobic layer comprises polyvinylidene fluoride and an adhesive, and the double-layer quick-drying moisture-permeable high-emission refrigeration film further comprises an alkaline substance. The double-layer quick-drying moisture-permeable high-emission refrigeration film has the characteristics of better refrigeration performance, higher moisture permeability and better wearable performance, including but not limited to high moisture permeability and high air permeability.

The invention discloses a tannic acid modified titanium carbide / silver nanowire / aramid nanofiber electromagnetic shielding composite film and a preparation method and application thereof.The preparation method comprises the steps that titanium aluminum carbide powder is added into a mixed solution of lithium fluoride and hydrochloric acid, stirring reaction is performed, ultrasonic treatment is performed to prepare an MXene aqueous dispersion, tannic acid is added into the MXene aqueous dispersion, stirring reaction is performed, and the tannic acid modified titanium carbide / silver nanowire / aramid nanofiber electromagnetic shielding composite film is obtained. Stirring and reacting at room temperature to prepare an MXene-TA dispersion liquid; the preparation method comprises the following steps: dissolving potassium hydroxide and para-aramid chopped fibers in dimethyl sulfoxide, and stirring to obtain an aramid nanofiber dispersion liquid; and the tannic acid modified titanium carbide / silver nanowire composite electromagnetic shielding composite film is prepared from the MXene-TA dispersion liquid, the AgNWs dispersion liquid and the aramid nanofiber. The electromagnetic shielding composite film prepared through the method is not prone to oxidation and good in mechanical performance, and the use stability of an electromagnetic shielding material is effectively improved.

The invention relates to the technical field of welding materials, in particular to a titanium carbide reinforced iron-based wear-resistant corrosion-resistant flux-cored wire for surfacing on the surface of a conveying roller. According to the specific technical scheme, the flux core comprises, by mass, 10%-20% of graphite, 25%-35% of ferrotitanium, 2%-6% of ferrovanadium, 3%-8% of electrolytic manganese metal, 2%-10% of ferromolybdenum, 5%-15% of ferrosilicon, 2% of aluminum-magnesium alloy and the balance Fe powder. According to the flux-cored wire prepared through the flux core, the surfacing alloy obtained through electric arc surfacing is good in surfacing manufacturability, attractive in weld joint forming and small in surface air hole number, and the flux-cored wire has high hardness, high-temperature abrasion resistance and corrosion resistance.

The invention relates to a design method of an infinite layer nickel oxide with a low sodium ion migration barrier, which comprises the following steps of: constructing an infinite layer rare earth nickel oxide and titanium carbide model and expanding cells to ensure that contact surfaces are consistent; constructing a heterojunction model and converting the heterojunction model into a three-dimensional atomic coordinate file; optimizing the surface structures of the two materials, combining and adding a vacuum layer, and then calculating the interface energy; structural changes and sodium ion migration barriers are analyzed, the ionic conductivity optimization rate is calculated, and a theoretical basis is provided for sodium ion battery negative electrode material design. Compared with the prior art, the ion conduction capability of the titanium carbide two-dimensional material as the sodium ion battery negative electrode is calculated and optimized through the first principle, the migration potential barrier is reduced, the infinite layer nickelate and titanium carbide heterojunction is constructed, the sodium ion conduction performance is improved, and a new thought is provided for the design of the sodium ion battery negative electrode material.

The invention discloses a nano-diamond reinforced powder metallurgy brake pad friction body material and a preparation method thereof, and relates to a brake pad friction body material and a preparation method thereof. The problem that in the prior art, the stability of a braking system of a train at a high running speed cannot be achieved is solved. The friction body material comprises a matrix component, a lubricating component, a friction component and a basic reinforcing component, wherein the sum of the mass percentages of the matrix component, the lubricating component, the friction component and the basic reinforcing component is 100%; wherein the mass percent of the copper powder in the matrix component is 50%-70%, and the mass percent of the iron powder in the matrix component is 10%-30%; the mass percent of the lubricating component is 10%-20%; the mass percent of the friction component is 1%-5%; the mass percent of the nano-diamond in the enhanced component is 0.1%-1%; the friction component is composed of one or more of silicon dioxide, aluminum oxide, titanium carbide, tungsten carbide, silicon carbide powder and zirconium oxide powder; the lubricating component is composed of one or more of graphite, carbon nanotubes and molybdenum disulfide. Belongs to the technical field of powder metallurgy.

The invention belongs to the technical field of phase-change composite materials, and in order to solve the problem that thermal management and electromagnetic shielding functions of the phase-change composite materials cannot be compatible, polyethyleneimine (PEI) and carboxymethyl cellulose (CMC) are added into a titanium carbide (Ti3C2Tx) nanosheet (MXene) aqueous dispersion to be uniformly dispersed to obtain a mixed solution, directional freezing is performed in liquid nitrogen, vacuum freeze drying is performed to obtain an MXene-based aerogel skeleton MCP, and the MXene-based aerogel skeleton MCP is prepared into the phase-change composite material. The phase-change composite material with a stable shape is obtained by vacuum impregnation and adsorption of a phase-change material in a molten state, not only has excellent thermal conductivity and electrical conductivity, but also has stable electrothermal conversion energy storage capacity and good electromagnetic shielding performance, and provides opportunities for meeting multi-scene response and practical application of multifunctional composite materials.

The invention discloses a WC-TiC-Mo2C-carbonfiber-8Co hard alloy and a preparation method thereof, and relates to the technical field of hard alloy preparation, the method comprises the following steps: S1, mixing tungsten carbide, cobalt, titanium carbide, molybdenum carbide and carbon fibers to obtain mixed powder; s2, the mixed powder is subjected to pre-pressing forming, and a hard alloy intermediate is obtained; and S3, the hard alloy intermediate is subjected to high-temperature and high-pressure sintering, and the WC-TiC-Mo2C-carbon fiber-8Co hard alloy is obtained. Wherein the conditions of high-temperature and high-pressure sintering are as follows: the sintering temperature is 1300-1450 DEG C, the sintering pressure is 2-6 GPa, and the heat preservation time is 2-10 minutes. By means of the preparation method, the hardness, toughness and other mechanical properties of the hard alloy can be further improved.

The application discloses a high-temperature-resistant and high-barrier composite film and a preparation method thereof, and relates to the technical field of layered products, which comprises A, B and C layers in sequence; the A layer comprises a temperature-resistant layer, a substrate layer and a barrier layer in sequence; the B layer comprises a substrate layer, a connecting layer, a barrier layer, an aluminum plating layer and a protective layer in sequence; the C layer is a heat-sealing layer; the preparation raw materials of the temperature-resistant layer material comprise aluminum oxide and titanium nitride; the preparation raw materials of the barrier layer material comprise ethylene-vinyl alcohol copolymer, succinamic acid, furoinic acid and carbon nanotubes; and the preparation raw materials of the heat-sealing layer material comprise titanium carbide, high-density polyethylene, metallocene polyethylene and zinc stearate. The high-temperature-resistant and high-barrier composite film provided by the application has excellent high-temperature resistance and barrier properties.

The invention provides a titanium carbide preparation process, and relates to the technical field of carbide preparation, the titanium carbide preparation process comprises the following steps: S1, selecting ilmenite with the phosphorus content of less than 100 ppm, crushing, reducing, concentrating, hydrolyzing, washing and filtering to generate a titanium dioxide filter cake; the pore diameter of titanium dioxide is controlled to be 1-5nm, the phosphorus content is less than 50ppm, and the sulfur content is less than 0.1%; s2, pulping the titanium dioxide filter cake obtained in the step S1 to form primary slurry, adding carbon black according to the content of titanium dioxide, and uniformly stirring to form secondary slurry; s3, continuously stirring the secondary slurry, and pumping the secondary slurry into a spray dryer for spray drying to generate titanium dioxide-carbon black particles; and S4, the titanium dioxide-carbon black particles pass through a high-temperature roasting area under the action of airflow and gravity to generate titanium carbide powder. According to the method, the mixing uniformity of the carbon black is larger than or equal to 95%, the yield of the titanium carbide is increased to 99.5% or above, and the quality and the yield of the finished titanium carbide are greatly improved.

The invention relates to the technical field of brake pads, in particular to a brake pad capable of reducing abrasion of a brake disc and a preparation technology thereof.The brake pad comprises, by weight, 20%-32% of reinforcing fibers, 12%-18% of a binder, 22%-34% of a friction regulator and 24%-38% of filler and functional additives, the reinforced fibers are at least one of titanium carbide coated carbon fibers, steel fibers and aluminum silicate ceramic fibers. According to the invention, the reinforced fibers construct a high-strength heat conduction network, and heat is quickly dispersed to reduce thermal stress concentration; the binder ensures the structural stability at high temperature; the friction regulator optimizes a friction coefficient curve through the synergistic effect of lubrication and friction increasing, and high-temperature fluctuation is avoided; the filler and the functional additive enhance the heat absorption and buffering capability, and adjust pores to relieve thermal shock. All the components have a synergistic effect, so that hot cracks of the brake disc can be reduced, and the crack resistance and the brake stability under extreme working conditions are improved.

The invention relates to a titanium carbide thin film material, a preparation method and a zinc ion hybrid capacitor, and the preparation method of the titanium carbide thin film material comprises the following steps: mixing titanium carbide nanosheets with an aqueous solution of ammonium salt, carrying out ultrasonic treatment, carrying out solid-liquid separation, and taking the supernatant liquid to obtain an intercalated titanium carbide nano colloid; adding a water-soluble salt into the intercalated titanium carbide nano colloid, reacting, carrying out solid-liquid separation, washing with water, and drying to obtain titanium carbide aerogel; and carrying out compression molding on the titanium carbide aerogel to obtain the titanium carbide film material. The super-wrinkled titanium carbide film prepared through a nanosheet distortion strategy has obviously improved compression resistance. Under the pressure of 1MPa, the microstructure of the electrode material does not change. In addition, the titanium carbide thin film material has lower tortuosity and can be directly used for constructing an electrode, ion transmission can be accelerated, the dynamic performance of the electrode is remarkably improved, and the requirement for high-quality load application is met.

The invention relates to the technical field of hard alloy, in particular to a hard alloy and a machining method. The machining method comprises the following steps that tungsten carbide, cobalt and titanium carbide are weighed according to a preset proportion; tungsten carbide, cobalt and titanium carbide are put into a ball mill to be mixed, and a mixture is obtained; performing granulation on the mixture; the granulated raw materials are put into a mold to be shaped, and a green body is obtained; sintering the green body to obtain a semi-finished product; and cutting, grinding and polishing the semi-finished product to obtain the hard alloy. By optimizing the raw material ratio, the hardness, toughness and bending strength of the hard alloy are remarkably improved, and the hard alloy can still keep good use performance under various severe working conditions. The production efficiency is improved, and the production period is shortened. Raw material inspection and finished product detection are enhanced, stable and reliable product quality is ensured, diversified requirements of customers are met, and therefore the problem that existing hard alloy is low in comprehensive performance is solved.

The invention provides a PCBN composite material and a preparation method thereof.The preparation method comprises the steps that two or more of zirconium oxide, titanium nitride, silicon nitride, titanium diboride, silicon carbide, titanium carbide, titanium carbonitride, aluminum oxide and aluminum nitride are mixed, and ceramic composite powder is prepared; the CBN micro powder and a metal binding agent are subjected to ball milling and mixing, and CBN pre-composite micro powder is prepared; mixing the CBN pre-composite micro powder with the ceramic composite powder to obtain a premix, placing the premix in a mold for pre-pressing to obtain a blank piece, and then assembling the blank piece for sintering to obtain a PCBN composite material; the mass percentage content of the ceramic composite powder is 5%-40%, the mass percentage content of the metal binding agent is 15%-30%, and the mass percentage content of the CBN micro powder is 45%-65%. According to the method, the toughness and the stability of the PCBN cutter can be improved on the premise of low content of CBN (Cubic Boron Nitride).

Tungsten powder, molybdenum powder, titanium carbide powder and tungsten-copper composite powder are mixed to obtain mixed powder, the mixed powder is pressed and formed to obtain a formed blank, the formed blank is sintered to obtain a ceramic reinforced tungsten framework, the ceramic reinforced tungsten framework is subjected to copper infiltration treatment, and the tungsten-infiltrated copper material is obtained. Titanium carbide and molybdenum are introduced when the tungsten framework is sintered, the strength of the tungsten framework is effectively improved through the solid solution strengthening effect of molybdenum and the second phase strengthening effect of titanium carbide, then the high-temperature strength of the tungsten infiltrated copper material is remarkably improved, meanwhile, the density of the material can be reduced, and weight reduction of tungsten infiltrated copper is achieved. Besides, in the process of sintering the ceramic reinforced tungsten framework, superfine tungsten-copper composite powder is introduced, the sintering performance of the tungsten framework can be remarkably improved, the subsequent copper infiltration effect can be optimized, and therefore the tungsten infiltrated copper material is uniform in component structure, the ablation resistance of the light ablation-resistant tungsten infiltrated copper material is excellent, and the density is greatly reduced compared with existing tungsten infiltrated copper.