31results about How to "Increased anisotropy" patented technology

The invention discloses a method for preparing anisotropic samarium-iron-nitrogen magnetic powder, and belongs to the technical field of magnetic materials, the method comprises the following steps: preparing Sm and Fe according to design components, and smelting to obtain samarium-iron alloy molten steel; casting the samarium-iron alloy molten steel onto a cooling roller to obtain an iron-samarium alloy sheet; the iron-samarium alloy sheet is placed in a vacuum heat treatment furnace to be subjected to homogenization treatment, the alloy sheet obtained after homogenization treatment is cooled to 200-300 DEG C, in the vacuum environment, hydrogen is introduced into the furnace, the absolute pressure of the hydrogen is controlled to be 0.05-0.1 MPa, and hydrogenation treatment is conducted for 2 h; after hydrogenation is completed, the temperature is increased to 400 DEG C, nitrogen is introduced to 0.5 MPa, the temperature is increased to 530 DEG C, then the furnace temperature is reduced to the room temperature, and the anisotropic samarium-iron-nitrogen magnetic powder is obtained.The preparation method of the samarium-iron-nitrogen magnetic powder has the advantages of being simple in preparation process, low in energy consumption, high in production efficiency, small in magnetic powder particle size, high in magnetic performance and good in magnetocrystalline anisotropy.

The invention provides a continuous fiber bionic meniscus and a preparation method thereof, and relates to the technical field of medical materials. The continuous fiber bionic meniscus provided by the invention comprises a circumferential orientation layer and a radial orientation layer, the circumferential orientation layer is composed of continuous circumferential composite filaments; the radial orientation layer is composed of continuous radial composite filaments; the composite filament is formed by wrapping continuous fibers with a biocompatible polymer matrix. Continuous fibers are introduced into a polymer filament framework for reinforcement, collagen fibers are simulated through composite filaments, the biomechanical property of the meniscus implant can be improved, remarkable anisotropy is generated, meanwhile, the continuous fibers can maintain the mechanical strength in vivo for a long time, long-term maintenance of the functions of the implant is facilitated, and the service life of the implant is prolonged. Therefore, the functional requirements of the bionic meniscus implant are met. The bionic meniscus implant is prepared by using a continuous fiber 3D printing process, the production efficiency is high, the required equipment is less, and the method is suitable for personalized customization.

The invention relates to a polycrystal Cs2ZnI4 material with low thermal conductivity, a single crystal Cs2ZnI4 material and application of the polycrystal Cs2ZnI4 material and the single crystal Cs2ZnI4 material. The polycrystal Cs2ZnI4 material is prepared by the following method: uniformly mixing and grinding CsI and ZnI2, and then sequentially performing high-temperature melting, quenching and annealing in a vacuum environment to obtain the polycrystal Cs2ZnI4 material with low thermal conductivity, the thermal conductivity of the polycrystalline Cs2ZnI4 material at room temperature is not greater than 0.17 W / m <-1 > K <-1 >. The single crystal Cs2ZnI4 material is prepared by adopting the following method: growing a polycrystal Cs2ZnI4 material in a vacuum environment by adopting a vertical gradient freezing method to obtain the single crystal Cs2ZnI4 material with low thermal conductivity. Compared with the prior art, the polycrystal Cs2ZnI4 material and the single crystal Cs2ZnI4 material prepared by the invention both show extremely low thermal conductivity and structural stability, and can be applied to the fields of electronic equipment, thermoelectric materials or aerospace and the like.

The invention discloses a novel low-cost high-entropy ceramic coating with a composite structure. The novel low-cost high-entropy ceramic coating comprises a supporting layer, a transition layer and a functional layer which are sequentially deposited, wherein the supporting layer comprises a TiZrAlCrSi layer and a TiZrAlCrSiN layer which are sequentially deposited, the transition layer comprises a TiZrAlCrSiN layer and a TiZrAlCrSiMN layer which are periodically and alternately deposited, and the functional layer comprises a TiZrAlCrSiMN layer; the invention further discloses a preparation method of the novel low-cost composite-structure high-entropy ceramic coating. The preparation method comprises the processes of cleaning, ion implantation, deposition of the supporting layer, deposition of the transition layer and deposition of the functional layer. The invention further discloses application of the novel low-cost composite-structure high-entropy ceramic coating in a superhard tough high-temperature-resistant tool. The novel low-cost composite-structure high-entropy ceramic coating provided by the invention solves the problems of low high-temperature hardness, poor wear resistance, weaker cracking resistance and the like of the existing cutter coating.

The invention discloses a heat treatment method for improving the structure uniformity of an additive-state GH4169 alloy, and belongs to the technical field of heat treatment processes. The method comprises the following steps: carrying out pre-aging treatment on the additive-state GH4169 alloy, and carrying out air cooling to room temperature; then carrying out homogenization treatment, and carrying out water cooling to room temperature; and finally, two-stage aging treatment is conducted, and air cooling is conducted to the room temperature. According to the method, the delta phase is precipitated at the grain boundary in a saturated mode through pre-aging treatment, and grain growth in the follow-up homogenization process is effectively limited through pinning of the grain boundary; the precipitation uniformity of a gamma'phase and a gamma ''phase in subsequent two-stage aging treatment is improved through homogenization treatment, recrystallization can be promoted, the grain structure can be transformed, the texture strength can be reduced, the grain structure uniformity can be improved, and the mechanical property of the additive-state GH4169 alloy can be improved; two-stage aging treatment is adopted, so that a gamma'phase and a gamma ''phase which are uniformly distributed are separated out from the additive-state GH4169 alloy, the effect of aging strengthening is achieved, and the yield strength, the tensile strength, the ductility and other mechanical properties of the additive-state GH4169 alloy are improved.

The present invention provides a preparation method of a 7 series aluminum alloy plate, which relates to the technical field of aluminum alloys, and comprises the following steps: step 1) homogenizing heat treatment of the 7 series aluminum alloy ingot, preheating after cooling, and then performing multiple rolling processes to obtain a rolled plate; wherein the preheating temperature is higher than the recrystallization temperature of the 7 series aluminum alloy ingot and lower than the solution temperature of the 7 series aluminum alloy ingot; the pressing amount of each rolling process is 30%-40%; step 2) solution treatment of the rolled plate, and then double-stage aging treatment to obtain a 7 series aluminum alloy plate. By adopting a large reduction rolling process in the temperature range above recrystallization, the plane rheology of the rolling process is induced to change to a three-dimensional shear rheology, the plane rheology ratio along the rolling direction is reduced, the transverse plasticity of the plate is improved, and the anisotropy of the plate is improved.

The invention provides a high-strength particle reinforced aluminum-lithium-based alloy as well as a preparation process and application thereof. The alloy comprises the following components in percentage by mass: 3.3 to 4.5 percent of Cu, 0.2 to 0.7 percent of Mg, 0.8 to 1.6 percent of Li, 0.2 to 0.8 percent of Ag, 0.2 to 0.6 percent of Mn, 0.01 to 0.2 percent of Zr, 0.2 to 0.6 percent of Zn, 0.1 to 0.8 percent of TiB2 and the balance of Al and inevitable impurity elements. The mass content of Ti is smaller than or equal to 0.15%, the mass content of Si is smaller than or equal to 0.1%, and the mass content of Fe is smaller than or equal The preparation of the aluminum-lithium alloy is realized through a method of combining a mechanical stirring and ultrasonic stirring composite refining process, extrusion / rolling and heat treatment, and the problem of performance reduction caused by TiB2 particle aggregation of the particle-reinforced aluminum-lithium-based alloy is effectively solved, so that the strength of the particle-reinforced aluminum-lithium-based alloy is improved, and the application range of the particle-reinforced aluminum-lithium-based alloy is expanded.

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

The present invention provides a powder spreading device for selective laser sintering, wherein a drum is arranged in a mounting seat, and the two ends are movably connected to a guide connecting plate and a connecting seat respectively, and the connecting seat is connected to a guide rail slider mechanism, and an external motor drives the powder spreading device to move and spread powder on the guide rail slider mechanism; there are two guide mechanisms, which are arranged in parallel on the left and right sides of the drum at a set angle, and the front and rear sides of the guide mechanism are fixedly connected by a guide connecting plate and a guide conversion mechanism, and a plurality of guide scrapers and scraper gears are evenly arranged on the upper and lower sides of the guide mechanism, and the guide scrapers are connected to an angle conversion mechanism arranged on the guide mechanism through the scraper gear to change the guide angle; the guide conversion mechanism realizes the up and down movement of the guide mechanism along a set track by connecting a conversion motor. In the powder spreading process, the powder material is arranged along the direction of the guide scraper of the guide mechanism, thereby avoiding the single-direction distribution of the composite substrate in the powder material and improving the anisotropic mechanical properties of the workpiece.

[Problem] To provide a metal-clad laminate and a method for manufacturing the same, whereby it is possible to bond a metal foil to an LCP film with high strength while improving the anisotropy of the LCP film. [Solution] The present invention provides a method for producing a metal-clad laminate, the method comprising: a lamination step for laminating a first liquid crystal polymer film, a second liquid crystal polymer film, and a lamination precursor of a first metal foil such that the surface of the first liquid crystal polymer film and the surface of the second liquid crystal polymer film directly face each other; a heating step for heating the lamination precursor for 1-60 minutes at a temperature of 15-45 DEG C higher than a first melting point, which is the higher one of the melting points of the first liquid crystal polymer film and the second liquid crystal polymer film, in an environment having a vacuum degree of 200 hPa or less; and a pressurization step in which cooling is started after the heating step has ended, and the lamination precursor is pressurized in the lamination direction at a first pressure of 0.5-5 MPa. In the lamination step, the first liquid crystal polymer film and the second liquid crystal polymer film are laminated such that the extension direction of the first liquid crystal polymer film and the extension direction of the second liquid crystal polymer film form an angle of 80-100 DEG.

The invention provides a low-cost and low-anisotropy titanium alloy thin plate and a preparation method thereof. The method comprises the steps that a titanium alloy plate blank is prepared through multi-fire forging, and surface treatment and coating are sequentially conducted on the titanium alloy plate blank; heating to 50-100 DEG C above the phase transformation point, keeping the temperature, and carrying out rough rolling and coiling; after uncoiling and flattening, width cutting and blanking are carried out in the direction perpendicular to the rough rolling direction; heating to 30-50 DEG C above the phase transformation point, preserving heat, immediately discharging and water-cooling, and then performing alkali-pickling for the first time; reversing rolling and multi-heating-number rolling until the thickness of a hot semi-finished product is reached; after annealing and second-time alkali and acid pickling, multi-rolling-process cold rolling is conducted to the target thickness, and intermediate annealing is conducted between every two adjacent rolling processes; performing recrystallization annealing treatment; edge cutting and head and tail cutting are conducted, and a bell-type furnace is adopted for pressing and straightening; and carrying out third alkali-pickling to obtain the titanium alloy sheet. According to the method, rolling, homogenization treatment, reversing rolling and multi-rolling-process cold rolling are combined, and the technical problem that in titanium alloy sheet preparation, structure performance and cost control cannot be considered at the same time is solved.

The present invention provides an anisotropic phenolic aerogel composite material and a preparation method thereof, belonging to the field of composite materials, wherein the anisotropic phenolic aerogel composite material comprises a phenolic aerogel matrix and a fiber reinforcement; the phenolic aerogel matrix is ​​a phenolic aerogel with an anisotropic nanopore structure. The aldehyde resin aerogel matrix in the phenolic aerogel composite material provided by the present invention is a phenolic aerogel with an anisotropic nanopore structure, which has a better orientation structure and anisotropy, can realize directional conduction of heat, overcomes the problem that the isotropic traditional phenolic aerogel formed by internal disordered nanoparticles accumulation cannot realize directional mass transfer, heat transfer and other functions, breaks through the limitation that it cannot be applied and developed in the field of directional mass transfer and transmission, greatly expands the application scope of phenolic aerogel, and has broad application prospects in the fields of ion conductors, environmental purification, filtration and energy catalysis.

The invention belongs to the technical field of magnesium alloy processing, and relates to a circulating cryogenic-annealing treatment method for reducing anisotropy of a magnesium alloy profile. Providing an extruded magnesium alloy profile formed by extrusion; the extrusion-state magnesium alloy profile is subjected to at least three times of cryogenic-annealing treatment, and each cryogenic-annealing treatment process comprises the following steps: firstly, the extrusion-state magnesium alloy profile is placed in an environment with the temperature of-200 DEG C to-190 DEG C for cryogenic treatment; and then the magnesium alloy profile subjected to subzero treatment is heated to 400-450 DEG C for annealing treatment. According to the method provided by the invention, the magnesium alloy extruded profile tends to be isotropic, the room-temperature ductility of the magnesium alloy extruded profile is improved, and a solid foundation is laid for application of the magnesium alloy extruded profile in more fields with strict requirements on performance uniformity. According to the method, the stability of the process is easily realized, the treatment period is relatively short, and the requirements of the market on products can be met more quickly.

The utility model discloses a point diffusion out-of-focus multi-effect lens, and relates to the technical field of vision prevention and control lenses. The point diffusion out-of-focus multi-effect lens is provided with the central optical area, the out-of-focus area and the light diffusion area, the out-of-focus area is located on the periphery of the central optical area, the light diffusion area comprises the diffusion point array to change light scattering so as to adjust the contrast ratio, the point diffusion area is matched with the out-of-focus area, and the vision delay effect is better; meanwhile, a plurality of out-of-focus rings are arranged to construct a plurality of out-of-focus areas, a microstructure array of the out-of-focus areas is arranged in a radial array mode, a structure with dense middle out-of-focus structures and sparse out-of-focus structures is formed, the physiological structure of human eyes is met, vision impediment is reduced, and the astigmatism problem of a wearer is solved; moreover, the out-of-focus zones in the adjacent out-of-focus annular zones are staggered in the circumferential direction, and the intervals between the out-of-focus zones in the adjacent out-of-focus annular zones are also staggered in the circumferential direction, so that the anisotropy of the out-of-focus zones is increased, the adaptation of a visual receptor is reduced, and the tolerance phenomenon is delayed.

This invention provides a method for metal interconnection of flexible circuits, comprising the following steps: coating a first dielectric layer; depositing a first metal layer and photolithographically etching a first metal pattern; coating a second dielectric layer and photolithographically etching interlayer vias; depositing a second metal layer and photolithographically etching a second metal pattern, wherein the second metal pattern overlaps with the first metal pattern; coating a third dielectric layer and photolithographically etching contact windows; and fabricating metal contacts. The beneficial effects of this invention are that the overlapping of the upper and lower metal layer patterns improves the reliability of vertical interconnection between metal layers, reduces lateral etching, improves etching accuracy, effectively avoids open circuits in flexible circuits, enhances the interconnection quality of flexible circuits, improves the fracture resistance of fine lines in flexible circuits, facilitates high-density wiring in flexible circuits, constructs thick electrical contact points, reduces contact resistance, improves signal transmission quality, and enhances the mechanical strength and wear resistance of the contacts.

The invention discloses a method for regulating and controlling anisotropy of a 2195 aluminum-lithium alloy based on an in-situ precipitated icosahedral quasicrystal phase, belongs to the technical field of regulation and control of anisotropy of the 2195 aluminum-lithium alloy, and aims to solve the problem of anisotropy of mechanical properties of the 2195 aluminum-lithium alloy. The method comprises the following steps: carrying out solution treatment on a 2195 aluminum-lithium alloy blank; preheating the blank subjected to solid solution treatment, and spraying a lubricant on the surface of the blank; the preheated blank is heated to the deformation temperature, and heat preservation is conducted; and the blank obtained after heat preservation is subjected to multi-direction forging, and the final deformation of the blank reaches the nominal accumulated strain. An icosahedral quasicrystal T2 phase is precipitated in situ in the multidirectional forging process, the average diameter of the phase is 52-71 nm, dislocation coplanar slippage is inhibited through an Orowan bypassing mechanism, and therefore the anisotropy of the alloy is reduced. The method can be used for improving the mechanical property anisotropy of the 2195 aluminum-lithium alloy, and theoretical guidance is provided for manufacturing weak-anisotropy 2195 aluminum-lithium alloy components.

According to the high-strength and high-plasticity FeNiAl eutectic high-entropy alloy and the preparation method thereof, through the collaborative design of B microalloying, homogenization, cross cold rolling deformation and medium-temperature heat treatment optimization, a fine and uniform eutectic lamellar structure and a high-density dislocation structure are formed in a plate, the brittleness brought by an as-cast coarse structure is effectively relieved, and the high-strength and high-plasticity FeNiAl eutectic high-entropy alloy is obtained. The tensile strength and the yield strength are remarkably improved, meanwhile, high ductility and fracture resistance are kept, and the performance anisotropy caused by the rolled texture is further weakened. The technological process is simple, parameters are easy to control, and the method is suitable for industrial amplification application and is suitable for high-temperature structural parts, molds, impact load components and other scenes with high requirements for comprehensive mechanical properties of materials.

The present invention belongs to the field of permanent magnetic materials, and specifically relates to a sintered NdFeB magnetic powder forming release agent and a method for preparing a high coercive force magnet. The specific composition of each component in the release agent is as follows: 1.0-5.0wt.% of zinc stearate, 0.5-2.0wt.% of epoxy resin, 0.5-2.0wt.% of nano Cu, 1.0-10.0wt.% of rare earth organic matter Dy(C5H5)3; the balance is gasoline solvent; when preparing a non-dense green body, the above-mentioned release agent is coated on the inner wall of the mold and the upper and lower pressure heads, and the release agent is coated on the surface of the non-dense green body before sintering. The release agent proposed in the present invention comprehensively considers the multifunctionality of magnet molding lubrication and diffusion. At the same time, in the actual magnet preparation process, there is no need to mix materials, change the existing production process, and no additional long-term heat treatment. The process is simple and the energy consumption is low. While maintaining a high magnetic energy product, the coercive force of the Nd-Fe-B sintered magnet is successfully increased to more than 20kOe. The method is suitable for large-scale production.

The invention belongs to a 2D wood cell wall thin layer batch preparation method which comprises the following steps: sequentially treating wood powder with an alkaline solution and a sodium hypochlorite solution, then putting the wood powder in a wet state into a kneading machine, carrying out mechanical shear mixing treatment for 4-5 hours, adding low-amount cellulase during the period, and promoting cell wall separation by cooperating with the mechanical shear mixing effect, so as to obtain the 2D wood cell wall thin layer. The 2D wood cell wall thin layer batch preparation material is obtained. According to the method, the 2D wood cell wall thin layer material can be obtained through high-yield, high-efficiency, low-cost and industrial-grade expansion, TEMPO treatment and ultrasonic treatment which are high in energy consumption and have environmental burden are not included in the method, large-scale preparation of the material is achieved through the kneading technology, the stripping yield of the 2D cell wall thin layer can be greatly increased, and the method is suitable for large-scale production of the 2D wood cell wall thin layer material. The stripping yield of the 2D cell wall thin layer can reach about 75%, the obtaining rate is high, and the requirement of large-scale application can be met.

A method and device for preparing hexagonal flaky magnesium hydroxide by continuous electrodeposition, belonging to the field of inorganic material preparation. The method comprises: adding a sodium chloride aqueous solution into an electrolytic cell, heating it to 30-60°C, adding bischofite to the anode area and stirring it, so that the Mg 2+ The concentration is 0.1-0.5 mol / L; then electrodeposition is performed. The corresponding device is: a diaphragm is set in the electrolytic cell, which divides the electrolytic cell into an anode area and a cathode area connected only by the diaphragm; the cathode and cathode are distributed in an asymmetric structure; the anode area is provided with a heating device, a stirring device and a filter tank. 2+ The concentration is 0, and the Mg in the anode area 2+ The diaphragm penetrates into the cathode to participate in the reaction under the action of electromigration, thereby reducing or even eliminating the influence of the cathode plate on the growth of the product. At the same time, the cathode reaction zone is expanded to reduce the supersaturation of the reaction, so that the product is directly generated in the cathode reaction zone, and nano-scale hexagonal flaky magnesium hydroxide with good dispersion is obtained. The device has great advantages in low-cost and high-efficiency continuous preparation.

The invention discloses a preparation method of a high-performance permanent magnetic ferrite material and a product thereof, and belongs to the technical field of oxide magnetic materials, the high-performance permanent magnetic ferrite material comprises ferrite particles SrxCayLa1-x-yFen CozRmO19 with hexagonal crystal structures and a mixed additive B. R is one or more of Na, Zn, Cu, Sn, Al, Cr, W and Mo; x, y, n, z and m are molar ratios in a specific range. The mixed additive B at least comprises nine components including pre-oxidized graphene, a boron-containing substance, calcium carbonate, silicon dioxide and the like. The preparation method comprises the following steps: mixing the raw materials according to the ratio, pre-calcining, adding the mixed additive B, grinding, carrying out compression molding in a magnetic field, and sintering to obtain a finished product. Through the synergistic effect of component optimization and additives, the residual magnetic induction intensity, the intrinsic coercive force and the coercive force squareness of the material are remarkably improved, meanwhile, the sintering temperature window is widened, the process stability is enhanced, and the method is suitable for large-scale production of high-performance permanent magnetic ferrite products.

The present invention provides an LCP composite material and a preparation method and use thereof. The LCP composite material comprises the following raw material components in weight percentage: 25-33% LCP; 60-73% continuous basalt fiber filaments after surface treatment; 1-5% aromatic polyester; 1-3% glass microbeads after surface treatment; the aromatic polyester is obtained by polycondensation reaction of hydroquinone with isophthaloyl chloride and / or terephthaloyl chloride. The LCP composite material is compounded with LCP, continuous basalt fiber filaments, aromatic polyester and glass microbeads, has low dielectric constant and low dielectric loss, good mechanical properties, and is antistatic and resistant to high and low temperatures.

The application discloses a preparation method of an apatite-type lanthanum silicate solid electrolyte, and comprises the following steps: step (1), mixing LaCrO3 powder and Ti3SiC2 powder to obtain mixed powder A; step (2), grinding the mixed powder A in anhydrous ethanol as a medium; step (3), drying the ground mixed powder A, and obtaining mixed powder B after the drying; step (4), secondly grinding the mixed powder B to obtain mixed powder C; and step (5), sintering the mixed powder C by using a discharge plasma technology, and obtaining the apatite-type lanthanum silicate bulk material after cooling to room temperature. Compared with a traditional preparation method, the method has the advantages of low sintering temperature, simple process, high efficiency, low cost, energy saving and environmental protection, and the prepared product is dense and has excellent mechanical properties.

The invention discloses a magnesium-zinc ferrite material as well as a preparation method and application thereof. The magnesium-zinc ferrite material is composed of main components and auxiliary components, the main components comprise Fe2O3, MgO, ZnO and CuO, and the auxiliary components comprise CaCO3, SiO2, Co2O3, SrCO3 or / and BaCO3, V2O5, ZrO2 and Al2O3. The preparation method of the magnesium-zinc ferrite material comprises the following steps: 1) pre-firing to prepare main component particles; 2) preparing the main component particles, the auxiliary component and the binder into a granular material; and (3) the granules are injected into a mold for compression molding, and then sintering and annealing are conducted. The magnesium-zinc ferrite material has the advantages of high temperature stability, high strength, high resistivity, moderate magnetic conductivity and the like, can be used for preparing inductors, and is simple in preparation method, wide in raw material source, low in production cost and suitable for large-scale industrial production and application.

The invention relates to the technical field of titanium alloy plate preparation, in particular to a preparation method of a thin-specification high-performance TC4 alloy single plate. A finished plate is obtained through cogging rolling, plate blank quenching, quenched plate blank surface treatment, second fire rolling, third fire rolling, third plate blank annealing, cold rolling in the first rolling process, plate annealing in the first rolling process, cold rolling in the second rolling process, plate annealing in the second rolling process and aftertreatment. The anisotropy of the plate is effectively improved through quenching after cogging and reversing rolling of hot rolling, the difference between the transverse performance and the longitudinal performance of the single plate prepared through the method is small, and the alloy single plate can be used in more application scenes easily.

The present invention relates to a titanium-doped multilayer copper-based composite material, comprising a titanium-doped layer, a reinforcement phase composite layer, and a copper-based surface layer; the reinforcement phase composite layer is at least one of an aluminum oxide whisker reinforcement layer and a graphene reinforcement layer; the copper-based surface layer is located at the top and bottom layers of the composite material; the titanium-doped layer is arranged between adjacent reinforcement phase composite layers, or between the reinforcement phase composite layer and the copper-based surface layer. In the titanium-doped multilayer copper-based composite material of the present invention, as the titanium content of the titanium-doped layer increases, the mechanical properties of the multilayer copper-based composite material are significantly improved, the titanium-doped layer structure realizes the continuous reinforcement of the multilayer structure, improves the interface bonding force of the reinforcement phase, realizes the anisotropy in the direction perpendicular to the multilayer structure, and has good friction performance and electrical conductivity.

This invention relates to the field of high-performance carbon composite materials, and more particularly to a high thermal conductivity pyrolytic graphite foam, its preparation method, and its applications. This invention constructs a "mesophase pitch-based carbon foam-carbon fiber cloth" sandwich composite structure by alternately layering mesophase pitch-based carbon foam and carbon fiber cloth, obtaining a high thermal conductivity pyrolytic graphite foam with high thermal conductivity, high anisotropy, high graphitization degree, and excellent mechanical properties. This solves the problem of insufficient performance of existing carbon foam materials and reveals its structure-property relationship, providing a new technical approach for the development and application of high-performance thermal management materials. It has significant scientific and application value for promoting the development of high-performance thermal management materials. The high thermal conductivity pyrolytic graphite foam provided by this invention combines high deposition uniformity, high multidimensional thermal conductivity, and excellent mechanical properties, and has broad application prospects in the fields of electronic device heat dissipation or aerospace thermal management.

This invention belongs to the field of copper composite material preparation technology, specifically relating to a method for preparing single-walled carbon nanotube-copper composite materials. Single-walled carbon nanotubes are prepared using a flotation catalytic method, followed by acid washing and high-temperature repair purification. Subsequently, the single-walled carbon nanotubes are subjected to mixed acid gradient oxidation, and cobalt nanoparticles are chemically deposited onto their surface. Then, an amorphous titanium dioxide coating is composited onto the modified single-walled carbon nanotubes using a sol-gel method. The composite powder is added to molten copper and mixed uniformly under ultrasonic and magnetic field-assisted stirring. Finally, the mixture is rapidly solidified and hot-drawn into copper rods using a hot-casting method under continuous magnetic field assistance to obtain the single-walled carbon nanotube-copper composite material. This method improves the dispersion and interfacial bonding strength of single-walled carbon nanotubes in the copper matrix and enables the single-walled carbon nanotubes to oriented within the copper matrix. The method is simple, and the prepared composite material exhibits excellent electrical, thermal, and mechanical properties.

The invention relates to the technical field of high polymer materials, in particular to low-anisotropy easily-welded LCP (Liquid Crystal Polymer) resin and a preparation method thereof. The molecular structural formula of the low-anisotropy fusible LCP resin is # imgabs0 #, wherein the structural general formula of R1 is a saturated alkane chain; r2 is a naphthalene ring structure. Through molecular structure design, a flexible chain small molecular structure is introduced between LCP rigid monomers, and the network structure LCP resin is synthesized through melt copolymerization, so that the problems of anisotropy and low weld mark strength of the LCP resin can be obviously improved.

The invention discloses a method for preparing polyacrylamide nanocomposite hydrogel by magnetic field orientation, including two steps of preparing PDA-Fe3O4-SiO2 paramagnetic nanocomposite and preparing oriented hydrogel; the preparation method of oriented hydrogel is as follows: dispersing PDA-Fe3O4-SiO2 paramagnetic nanocomposite in polydopamine solution, ultrasonicating, forming ferrofluid; then adding acrylamide monomer, initiator, crosslinking agent and catalyst, stirring at room temperature, forming a uniform gel precursor solution; finally, pouring the gel precursor solution into a silica gel mold, putting it into a magnetic field, and forming oriented hydrogel under magnetic field conditions. The invention improves the directionality of the hydrogel microstructure by introducing magnetic nanocomposite into the gel, and the prepared oriented hydrogel has an anisotropic hydrogel with prominent anisotropic structure and excellent mechanical properties.