63 results about "Titanium diboride" patented technology

The invention relates to the technical field of aluminum alloy pipes, in particular to a corrosion-resistant aluminum alloy pipe which comprises an aluminum alloy pipe and a corrosion-resistant layer coated on the surface of the aluminum alloy pipe, the aluminum alloy pipe comprises the following raw materials: 0.1-0.3% of Mg, 0.06-0.2% of Si, 0.1-0.5% of Fe, 0.005% of Cu, 0.2-0.5% of Mn, less than 0.1% of Cr, 0.1-0.4% of Zn, 0.05-0.2% of Ti, 0.01-0.05% of V and the balance of Al; the corrosion-resistant layer comprises the following components in parts by weight: 100 parts of epoxy resin emulsion, 15-25 parts of composite modified titanium diboride, 3-5 parts of an amino curing agent, 1-3 parts of carbon fibers, 20-30 parts of deionized water, 2-3 parts of a dispersing agent and 0.3-0.5 part of a defoaming agent. According to the technical scheme, the overall corrosion resistance and impact resistance of the aluminum alloy pipe are remarkably improved.

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).

The invention belongs to the technical field of aero-engine materials, and particularly relates to a high-temperature-resistant aero-engine blade and a preparation method thereof.According to the blade, titanium-aluminum alloy is adopted as a base body, and two novel materials including a core-shell structure self-healing reinforcement phase and a rare earth niobate ferroelastic protection compound are introduced, so that the high-temperature-resistant aero-engine blade is obtained; and the comprehensive performance of the blade in a high-temperature environment is remarkably improved. The core-shell reinforcement phase takes titanium diboride as a core and boron nitride as a shell, and can realize a self-healing function at a high temperature; the rare earth niobate compound has ferroelastic behavior and ultralow thermal conductivity through doping modification of tantalum and rhenium. The preparation process comprises the following steps: mixing the titanium-aluminum alloy powder, the reinforcing phase, the silicon carbide short fibers and the binder, carrying out spark plasma sintering molding, carrying out machining, applying the protective coating through plasma spraying, and finally carrying out heat treatment. According to the method, the process is simplified, and the prepared blade has excellent high-temperature resistance, oxidation resistance and mechanical property and is suitable for aero-engine hot end components.

The invention relates to the field of laser cladding powder, in particular to wear-resistant and corrosion-resistant laser cladding powder and a preparation method thereof. The laser cladding powder is used for solving the problem that a cladding layer formed by existing laser cladding powder is poor in abrasion resistance and corrosion resistance. According to the laser cladding powder, the carbon nano tube loaded lanthanum-yttrium oxide powder and the copolymer coated titanium diboride powder are added, and the carbon nano tube and the lanthanum-yttrium oxide have a synergistic effect to refine grains, so that the corrosion resistance of a cladding layer is improved, and the carbon nano tube has good wear resistance; after the surface of the titanium diboride powder is coated with the copolymer, the dispersity of the titanium diboride is improved, a product decomposed by the copolymer reacts with the titanium diboride under the action of laser to generate titanium carbide, and the wear resistance of a cladding layer is enhanced; the laser cladding powder is suitable for prolonging the service cycle of a mold, can be used for surface strengthening of mine equipment parts, enhances the wear resistance and corrosion resistance of the mine equipment parts, reduces the maintenance frequency of the equipment, and can provide an effective solution for surface strengthening of parts in various industrial fields.

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.

The invention relates to the technical field of material surface engineering and metallurgical equipment, in particular to a composite coating for prolonging the service life of a crystallizer copper plate and a plasma spraying preparation method thereof.The composite coating comprises, by mass, 35%-55% of chromium, 20%-55% of nickel, 5%-10% of titanium diboride, 0.1%-0.3% of niobium and the balance chromium carbide and inevitable trace impurity elements. According to the invention, titanium diboride and chromium carbide are used as main hard reinforcing phases, so that the coating shows excellent wear resistance at normal temperature and high temperature; a hollow graphite electrode is adopted in the spraying process, plasma arc is generated, and meanwhile an ablation product (carbon) provides a carbon source for formation of chromium carbide; the titanium powder and the boron powder are subjected to an in-situ reaction in a plasma arc to generate titanium diboride, and the in-situ synthesis technology enables hard phase particles to be fine and uniformly distributed, and forms a firm interface with a metal binding phase, so that the problems of interface pollution and weak combination caused by the addition of the hard phase are avoided.

This invention discloses a coating for sand casting of aluminum-lithium alloys and its preparation method. The coating comprises a surface layer in contact with the sand mold and a top layer in contact with the melt. The surface layer material is an alcohol-based zirconium oxide coating containing graphene, and the top layer coating is an alcohol-based boride coating containing titanium diboride and zirconium diboride. This invention effectively improves the coating density and heat transfer rate by doping graphene with metal boride nanoparticles. Using graphene, ceramic materials, and metal borides as aggregates and dopants effectively suppresses the burn-off of light elements such as Li, reducing subcutaneous pinholes and porosity defects in the casting. Using zirconium oxide powder as aggregate increases nucleation sites, effectively improving the quality of non-ferrous metal castings.

The invention provides a prismatic titanium diboride reinforced boron nitride-based conductive ceramic evaporation boat and a preparation method thereof, and belongs to the technical field of ceramic evaporation boats. The step of preparing the boron nitride matrix comprises the following steps: adding boron nitride powder into a nitric acid solution to obtain pretreated boron nitride powder; adding the pretreated boron nitride powder into absolute ethyl alcohol, adding tetrabutyl titanate and deionized water, adjusting the pH value to 4.0-4.3, stirring for 1.2-1.5 hours at the temperature of 30-32 DEG C, drying and calcining to obtain a boron nitride matrix; the prepared conductive ceramic evaporation boat is low in resistivity, high in strength, excellent in corrosion resistance and good in comprehensive performance.

The invention discloses a four-phase composite ceramic heating element and a preparation method thereof, and relates to the technical field of ceramic heating materials, the composite ceramic heating element comprises the following components: 30%-40% of titanium diboride, 30%-40% of titanium carbide, 10%-28% of silicon carbide, 1%-12% of hexagonal boron nitride, 0.5%-3% of nano zirconium dioxide and 1%-4% of silicon nitride. A four-phase composite system of TiB2 (titanium diboride), TiC (titanium carbide), SiC (silicon carbide) and hBN (hexagonal boron nitride) is constructed, basic expansion reduction is achieved through the low expansion characteristic of SiC, thermal expansion mismatching stress between different phases is dispersed in combination with the interface regulation and control effect of an h-BN layered structure, compared with an existing ternary system, the minimum thermal expansion coefficient is reduced to 5.8 * 10 <-6 > K <-1 >, and the thermal expansion coefficient is reduced to 5.8 * 10 <-6 > K <-1 >. And the interfacial compatibility is remarkably improved, and thermal stress is prevented from being gathered at the interface.

The invention relates to the field of refractory materials, in particular to a high-strength refractory material and a preparation method thereof, which are used for solving the problem that the existing traditional refractory material is low in strength and difficult to meet the high-standard requirement of modern industry on equipment. The high-strength refractory material comprises the following components: silicon carbide, tabular corundum, silicon powder, yttrium oxide, magnesium oxide, titanium diboride and a phosphorus-containing phenyl multi-epoxy-group binding agent, according to the preparation method, silicon carbide, tabular corundum, silicon powder, yttrium oxide, magnesium oxide and titanium diboride are taken as main raw materials, the main raw materials are endowed with excellent mechanical properties, and after a phosphorus-containing phenyl polyepoxy binding agent is added, the mechanical properties of the main raw materials can be further remarkably improved, so that the prepared refractory material has the characteristics of high strength, high temperature resistance and the like. The composite material shows high durability and reliability in a high-temperature environment, and is suitable for thermal protection in the high-temperature environment and internal construction of high-temperature equipment.

The application belongs to the technical field of refractory materials, and particularly relates to high-strength anti-stripping industrial kiln castable and a preparation method thereof. The industrial kiln castable provided by the application comprises white corundum, modified corundum, petalite, composite micropowder, modified micropowder, a binder and sodium hexametaphosphate. The white corundum, the modified corundum and the petalite are used as aggregates of the kiln castable, the composite micropowder and the nano micropowder are added to fill the aggregate gaps, and the porosity of the castable is reduced. The titanium dioxide is used to dope the corundum to form a solid solution, and a silica ceramic layer is coated on the surface of the nano titanium diboride by using a sol-gel method, so that the interface bonding force between the nano titanium diboride and the matrix is strengthened, the rigid reinforcing points are increased, and the high-temperature compressive strength is improved.

The invention relates to the technical field of metal-based composite materials, in particular to a preparation method of a titanium-based composite material with a bimodal non-uniform net structure. The invention provides a preparation method of a titanium-based composite material with a bimodal non-uniform net structure, which comprises the following steps: mixing titanium alloy metal powder as a base material with nano titanium diboride, lanthanum hexaboride and a silicon powder reinforcement material through high-energy ball milling to obtain composite powder; a field-assisted sintering technology (FHP) is utilized, and a non-continuous reinforced titanium-based composite material (DRTiMCs) sintered blank is obtained; and carrying out heat preservation in a vacuum heat treatment furnace, and then carrying out a hot rolling experiment to obtain the DRTiMCs with the bimodal non-uniform network structure. The bimodal non-uniform net structure is composed of micron TiBw, nano TiBw, nano La2O3 and nano silicide, DRTiMCs of the bimodal non-uniform net structure have excellent strength and ductility, the tensile strength reaches 1544 MPa and 1560 MPa, and the percentage elongation after fracture is 7.7% and 10.2%. The DRTiMCs provide a good working idea for further development and engineering application of the composite material in the fields of aviation and aerospace.

This invention relates to the fields of materials surface engineering and metallurgical equipment technology. Specifically, it relates to a composite coating for improving the lifespan of copper plates in crystallizers and its plasma spraying preparation method. The chemical composition, by mass percentage, includes: 35%-55% chromium, 20%-55% nickel, 5%-10% titanium diboride, 0.1%-0.3% niobium, with the balance being chromium carbide and unavoidable trace impurities. In this invention, titanium diboride and chromium carbide are used as the main hard reinforcing phases, enabling the coating to exhibit excellent wear resistance at both room temperature and high temperature. During the spraying process, a hollow graphite electrode is used, generating a plasma arc. Simultaneously, the ablation products (carbon) provide a carbon source for the formation of chromium carbide. Titanium powder and boron powder undergo an in-situ reaction in the plasma arc to generate titanium diboride. This in-situ synthesis technology results in fine and uniformly distributed hard phase particles, forming a strong interface with the metal binder phase, avoiding the problems of interface contamination and weak bonding caused by externally added hard phases.

The invention provides a positive electrode material and a preparation method thereof, an electrochemical device and electronic equipment, and particularly relates to the technical field of battery materials. The positive electrode material comprises a substrate and a coating layer, the substrate is a nickel-based layered oxide, and in the nickel-based layered oxide, the molar content of nickel is not less than 80% on the basis of the total amount of metal except lithium; the surface of the base body is coated with the coating layer, and the coating layer is a titanium diboride layer. The nickel-based layered oxide material is subjected to surface coating through titanium diboride, so that direct contact between an active material and an electrolyte can be reduced, generation of an interface side reaction is inhibited, and the cycle life of the battery is effectively prolonged; extraction of extra lithium elements from the interior of the matrix material can be avoided, the problem of low capacity caused by unbalance of stoichiometric ratio of lithium in the material is prevented, and the performance of the subsequent ternary positive electrode material is ensured to be fully exerted.

This invention relates to the field of sliding materials for seismic isolation bearings, specifically disclosing a high-temperature resistant and wear-resistant composite material for building seismic isolation bearings and its preparation method. The high-temperature resistant and wear-resistant composite material for building seismic isolation bearings comprises the following raw material components in parts by weight: aliphatic polyketone, high-styrene resin-modified methyl vinyl silicone rubber, silicone resin, fluorosilicone rubber, polytetrafluoroethylene, high-temperature resistant filler, lubricant, compatibilizer, and coupling agent; the high-temperature resistant filler comprises the following raw material components: chopped basalt fiber, titanium diboride, silicon nitride, and ceramic powder. The high-temperature resistant and wear-resistant composite material for building seismic isolation bearings prepared by this invention synergistically improves the material's wear performance, thermal stability, and compressive modulus through mechanisms such as hard embedding of filler, elastic energy absorption of rubber and plastic, and self-lubricating interface construction, thus overcoming the shortcomings of existing technologies.

The invention belongs to the technical field of refractory materials, and particularly relates to a high-strength anti-stripping industrial kiln castable and a preparation method thereof. The industrial kiln castable provided by the invention is prepared from white corundum, modified corundum, petalite, composite micro powder, modified micro powder, a binding agent and sodium hexametaphosphate. White corundum, modified corundum and petalite are adopted as aggregates of the kiln castable, and composite micro powder and nano micro powder are added to fill gaps of the aggregates, so that the porosity of the castable is reduced; the corundum is doped with titanium dioxide to form a solid solution, and the surface of the nano titanium diboride is coated with a silicon oxide ceramic layer by a sol-gel method, so that the interface bonding force between the nano titanium diboride and a matrix is enhanced, rigid reinforcing points are increased, and the high-temperature compressive strength is improved.

The invention provides a preparation method of large-size titanium diboride powder, and belongs to the technical field of titanium diboride powder. The preparation method comprises the following steps: pretreating modified titanium dioxide and carbon black, and mixing and sintering. The step of modifying titanium dioxide comprises the following steps: adding boric acid and lithium carbonate into an ethanol solution, then adding titanium dioxide, and carrying out ultrasonic dispersion to obtain coated titanium dioxide; adding the coated titanium dioxide into a niobium nitrate solution, stirring for 20-30 minutes at room temperature, drying, and roasting for 110-120 minutes at the temperature of 580-600 DEG C to obtain modified titanium dioxide; the titanium diboride powder prepared by the method is uniform in size distribution, high in purity and good in stability.

The utility model discloses a glass cover plate, a display module and electronic equipment, and the glass cover plate comprises a base material layer; the titanium diboride layer is arranged on the upper surface of the base material layer; and the scandium oxide layer is arranged on one side, back to the base material layer, of the titanium diboride layer. The mechanical property and the wear resistance of the product are improved, and the optical property is also considered.

The invention discloses a multiphase ceramic material connector for a fuel cell, the multiphase ceramic material connector is divided into an upper surface layer, a middle matrix layer and a lower surface layer in the height direction, and the upper surface layer and the lower surface layer are both formed by compounding lanthanum hexaboride and hexagonal boron nitride. And the middle matrix layer is formed by compounding titanium diboride and hexagonal boron nitride. According to the invention, the composite ceramic material connector has excellent conductivity, can realize full-temperature-range conductivity from room temperature to high temperature, and has better mechanical properties and machinability.

The invention discloses a medium-low temperature aluminum nitride ceramic heater and a preparation method thereof. The medium-low temperature aluminum nitride ceramic heater comprises an aluminum nitride ceramic substrate and a metal water-cooling base or a ceramic connecting support body which are sequentially arranged from top to bottom, wherein the metal water-cooling base or the ceramic connecting support body is used for supporting the aluminum nitride ceramic substrate; the aluminum nitride ceramic matrix is prepared from the following raw materials in percentage by mass: 85-95% of aluminum nitride, 3-5% of yttrium oxide, 0-10% of titanium nitride, 0-10% of titanium diboride, 0-5% of silicon carbide, 0-5% of tungsten carbide and 0-5% of titanium dioxide. According to the aluminum nitride ceramic heater, the formula of the aluminum nitride ceramic matrix of the aluminum nitride ceramic heater is optimized, other materials such as yttrium oxide, titanium nitride, titanium diboride, silicon carbide, tungsten carbide and titanium dioxide are introduced, and the content of each component is changed through formula blending, so that the purpose of performance optimization is achieved; the volume resistivity of the aluminum nitride ceramic heater in the medium and low temperature environment is effectively reduced, the adsorption force in the machining process is guaranteed to meet the requirement, the preparation technology is simple, operation is easy to control, and industrial production is facilitated.

The application belongs to the technical field of aero-engine materials, and particularly relates to a high-temperature-resistant aero-engine blade and a preparation method thereof. The blade adopts titanium-aluminum alloy as a matrix, introduces two new types of materials of a core-shell structure self-healing reinforcing phase and a rare earth niobate iron elastic protective compound, and significantly improves the comprehensive performance of the blade in a high-temperature environment. The core-shell reinforcing phase takes titanium diboride as a core and boron nitride as a shell, and can realize self-healing function at high temperature. The rare earth niobate compound is modified by doping tantalum and rhenium, and has ferroelastic behavior and ultralow thermal conductivity. The preparation process comprises the following steps: mixing titanium-aluminum alloy powder, the reinforcing phase, silicon carbide short fibers and a binder, and then performing discharge plasma sintering to form; after mechanical processing, a protective coating is applied by plasma spraying; and finally, heat treatment is performed. The method simplifies the process, the prepared blade has excellent high-temperature resistance, oxidation resistance and mechanical properties, and is suitable for aero-engine hot end components.

This invention relates to the field of electronic materials technology, specifically disclosing a titanium diboride ceramic electrode slurry, its preparation method, and a ceramic electrode. The titanium diboride ceramic electrode slurry is characterized by being prepared from the following components by mass percentage: 40%–89% titanium diboride powder, 10%–50% organic system, 1%–5% solid binder phase, and 0–5% additives. This invention uses titanium diboride powder as the functional phase. The physicochemical properties of titanium diboride are similar to those of the ceramic substrate. By bonding it to the ceramic substrate through high-temperature sintering, the sintering shrinkage behavior is more compatible, effectively reducing stress and defects during co-firing, and improving bonding strength and process stability.

The invention relates to the technical field of boron carbide ceramics, in particular to boron carbide-titanium diboride composite powder, boron carbide-titanium diboride composite ceramic and a preparation method of the boron carbide-titanium diboride composite powder and the boron carbide-titanium diboride composite ceramic. The method comprises the following steps: uniformly dispersing an organic titanium compound and boron carbide into an organic solvent to obtain boron carbide-organic titanium compound slurry; adding pure water into the boron carbide-organic titanium compound slurry for complete hydrolysis reaction, and then carrying out suction filtration and drying to obtain a boron carbide-titanium dioxide precursor; and carrying out in-situ calcination on the boron carbide-titanium dioxide precursor to obtain the boron carbide-titanium diboride composite powder. According to the invention, the B4C composite powder is prepared by an organic titanium compound hydrolysis method, the powder is subjected to high-temperature calcination and converted into B4C-TiB2 powder, and then the powder is subjected to ball milling dispersion and hot pressed sintering, so that uniform dispersion of TiB2 particles and great improvement of mechanical properties are realized.

The invention relates to the technical field of mechanical sensing, in particular to a sensor for gear strain in-situ detection and a preparation method and application thereof. The sensor for gear strain in-situ detection comprises a ceramic film formed by curing a polymer precursor, the electrodes are respectively connected to two ends of the ceramic film; wherein the polymer precursor is prepared from polysilazane (PSN2), titanium diboride (TiB2) and conductive carbon powder (CCP), and the polymer precursor is prepared from polysilazane (PSN2), titanium diboride (TiB2) and conductive carbon powder (CCP). The ceramic film has the characteristics of high temperature resistance and corrosion resistance, and can be arranged in a tooth root transition area (a gear stress concentration core area) to directly form a uniform sensing structure, so that in-situ monitoring of strain is realized.

The invention discloses an in-situ ceramic skeleton reinforced heat-resistant aluminum alloy material and a preparation method thereof, and relates to the technical field of metal materials. A high-melting-point ceramic phase is generated in an in-situ polymerization mode, then a three-dimensional continuous framework is formed, the ceramic framework contains ultra-high-temperature ceramic phases such as aluminum oxide, titanium diboride and zirconium boride, zirconium dioxide, lanthanum oxide and mullite fibers are introduced, grain boundary slippage and atomic diffusion of an aluminum alloy matrix at the high temperature can be hindered, and the high-temperature resistance of the aluminum alloy matrix is improved. And the thermal deformation resistance of the material is remarkably improved, and the obtained in-situ ceramic skeleton reinforced heat-resistant aluminum alloy material has excellent mechanical properties at high temperature.

The invention relates to the technical field of alloys, in particular to a wear-resistant and light-weight hard alloy material, a preparation method and application of the wear-resistant and light-weight hard alloy material in anti-skid nails. According to the material, interface bonding is enhanced through double-grafted reduced graphene oxide, high-entropy alloy pre-alloyed powder is adopted as a binding phase, hard phases such as tungsten carbide, titanium diboride and titanium carbide are combined, and the composite material is prepared through multiple processes such as composite slurry preparation, spray drying, multi-stage sintering, vacuum impregnation secondary coating and hot-pressing densification. And constructing a gradient structure from inside to outside. The obtained material is low in density, high in hardness, high in transverse breaking strength, excellent in toughness and wear resistance and high in thermal diffusivity, the problems that a traditional anti-skid nail is high in density, weak in interface bonding and poor in thermal conductivity are effectively solved, and light weight and long-acting durability are achieved.

The invention discloses a smelting method for solving macrosegregation of high-boron steel, and belongs to the technical field of high-end special steel metallurgy. According to the method, titanium diboride (TiB2) powder is sealed in a metal ladle and added into a vacuum induction furnace together with furnace charge, high yield of boron and titanium and liquid phase extreme homogenization are achieved through the synergistic effect of electromagnetic stirring and argon bottom blowing, and a segregation source is eliminated from the source; and deep purification and directional solidification are conducted on the uniform electrode through an electroslag remelting technology, and finally the high-boron steel cast ingot which is free of macrosegregation, fine and dispersed in structure and high in purity is obtained. The technical problems that the high-boron steel is low in yield, serious in segregation and uneven in performance are solved, and the technological process is suitable for industrial large-scale production.

The application provides a prismatic titanium diboride reinforced boron nitride-based conductive ceramic evaporation boat and a preparation method thereof, and belongs to the technical field of ceramic evaporation boats; the step of preparing the boron nitride base comprises the following steps: adding boron nitride powder into a nitric acid solution to obtain pretreated boron nitride powder; adding the pretreated boron nitride powder into anhydrous ethanol, adding tetrabutyl titanate and deionized water, adjusting the pH value to 4.0-4.3, stirring at 30-32 DEG C for 1.2-1.5 h, drying and calcining to obtain the boron nitride base; the conductive ceramic evaporation boat prepared by the application has low resistivity, high strength, excellent corrosion resistance and good comprehensive performance.

This invention discloses an electro-erosion resistant metal-based composite contact material with a gradient textured interface and its preparation process, relating to the technical field of metal-based electrical contact materials for low-voltage electrical appliances. The process includes the following steps: S1. Preparation of surface functional phase precursor: Preparing a preform containing nano-scale zirconium diboride-titanium diboride multiphase precursor clusters as an intermediate raw material for introducing the multiphase reinforcing phase; S2. Gradient preform forming: Preparing a core high-conductivity layer preform, an intermediate gradient transition layer preform, and a surface electro-erosion resistant functional layer preform respectively; wherein, the surface preform is obtained by cold pressing after mixing the surface functional phase precursor with matrix metal powder in a certain proportion. Through the core processes of asynchronous rolling pre-control and segmented gradient annealing, the material texture orientation is directionally controlled, resulting in a core high-conductivity layer. This texture exhibits the lowest lattice scattering probability and the smallest effective electron mass along the electron transport direction.

The application discloses a high-fluidity aluminum alloy powder for additive manufacturing and a preparation method thereof, relates to the technical field of additive manufacturing powder, and comprises the following contents: taking Al pre-alloyed aluminum-silicon-magnesium system spherical powder as a matrix, forming a C1 nitrogen-containing aluminum oxide or oxygen-nitrogen chemical state surface layer on the surface, the thickness being 2-8 nanometers and N / (N+O) being 0.10-0.35; dry method strong shearing is used to anchor a B layer on the C1 surface, the B layer being composed of B1 titanium diboride nanoparticles and B2 titanium nitride nanoparticles, and E1 porous micro-agglomerates composed of B1 and B2 are introduced; and D1 aluminum-magnesium base alloy powder with a C1 surface can be optionally added. The preparation method comprises fluidized bed non-thermal plasma treatment, solid phase composite anchoring, spray drying preparation of E1 and mixing. After multiple recycling and screening reuse, the powder keeps stable fluidity and spreading, reduces water and oxygen content drift and powder spreading defects, improves compactness, and reduces porosity and performance dispersion.