436 results about "Whisker" patented technology

The invention discloses a high-strength and high-toughness aluminum nitride ceramic and a preparation method thereof, and relates to the technical field of ceramics, a sol-gel method is adopted to coat the surface of aluminum nitride with a stable shell layer to form a core-shell structure, meanwhile, the low lattice mismatch rate of a core-shell interface is utilized to reduce thermal resistance, and toughness and thermal conductivity are both considered; according to the external magnetic field tape casting method, the magnetic dipole moment orientation principle is utilized, an external magnetic field is applied in the tape casting stage, the in-plane mechanical property is improved, and the fracture toughness is improved through the magnetism of aluminum nitride whiskers; a reinforcement is introduced to improve the mechanical property and corrosion resistance of the aluminum nitride ceramic material, multi-granularity powder is compounded, large-particle aluminum nitride powder is used as a sintering and heat-conducting framework material, and high activity provided by submicron particles is utilized to promote sintering, so that the sintering temperature of aluminum nitride can be remarkably reduced, and the performance is greatly improved; and the aluminum nitride substrate expands more application fields on a future packaging circuit.

The invention discloses a preparation method of a textured silicon nitride ceramic substrate, and belongs to the technical field of ceramic products. Beta-silicon nitride whiskers with the long diameter of 4-15 microns and the short diameter of 1-3 microns are added into silicon nitride ceramic slurry according to the design, and when the whiskers containing beta-silicon nitride pass through a scraper of a casting machine, the whiskers tend to be directionally arranged in the casting direction, so that a textured structure is generated in the silicon nitride ceramic substrate. The textured structure is beneficial to improving the three-point bending strength, the fracture toughness and the thermal conductivity in the horizontal direction of the ceramic substrate.

The invention provides a deposition ring, a deposition assembly and deposition equipment capable of improving deposition uniformity of a thick film. The deposition ring comprises a central part, an inner circular ring and an outer circular ring which are concentrically arranged at intervals in sequence from inside to outside; the inner circular ring is connected with the center part through a plurality of first supporting rods arranged at intervals and connected with the outer circular ring through a plurality of second supporting rods arranged at intervals. The deposition ring further comprises a plurality of connecting rods arranged at intervals, one ends of the multiple connecting rods are connected with the outer circular ring, and the other ends of the multiple connecting rods extend in the direction away from the deposition ring and are used for slidably connecting the deposition ring with an external structure. By means of the optimized structural design, when the deposition ring is used for thin film deposition equipment, the thin film deposition uniformity can be remarkably improved, heat distribution on the surface of a wafer can be improved, and surface defects such as whiskers can be reduced. By adopting the deposition equipment with the deposition ring, the film deposition uniformity can be improved under the condition that process steps are not increased, the yield of the equipment is favorably improved, and the production cost is reduced.

The invention provides a whisker-based insulating anticorrosive coating and a preparation method thereof, and belongs to the technical field of insulating materials, the insulating anticorrosive coating comprises a component A and a component B. The component A comprises, by weight, 60-80 parts of an organosilicon modified copolymer, 0.5-2 parts of a dispersant, 0.5-5 parts of an antifoaming agent, 0.1-1.0 part of an adhesion promoter, 0.1-1.0 part of a film forming aid, 1-3 parts of a rheological aid and 20-40 parts of a filler; and the component B comprises 95-99 parts of a curing agent and 1-5 parts of a defoaming agent. According to the invention, the boron nitride whisker is subjected to hydroxylation modification and grafted into a long-chain structure of tetramethyl dihydroxy disiloxane, and then is subjected to a polymerization reaction with epoxy resin to obtain an organosilicon copolymer, so that the dispersity of boron nitride in a coating system and the flexibility of the coating system are effectively improved; the one-time film forming thickness of the insulating anticorrosive paint can reach the millimeter level by adopting a brush coating or spray coating mode, so that the requirement of high voltage resistance of the coating is met.

The invention relates to the technical field of titanium-steel composite plates, and particularly discloses a high-thermal-conductivity titanium-steel cold-rolled composite plate and a preparation method thereof.The preparation method comprises the steps that plasma etching treatment is conducted on a titanium plate, a TiB2-graphene heat conduction layer is arranged on the etched surface in a laser cladding mode, and an aluminum oxide whisker layer is deposited on a stainless steel plate through plasma electrolysis; the preparation method comprises the following steps: spraying nano-copper slurry on the surface of aluminum oxide whiskers, curing, carrying out composite rolling on a modified titanium plate and a stainless steel plate, and carrying out annealing and tempering treatment after rolling to obtain the high-thermal-conductivity titanium steel cold-rolled composite plate.

The invention relates to a nano silicon carbide whisker and a preparation method thereof, and the preparation method comprises the following steps: (1) carrying out acid process treatment on fly ash by using an acid solution, so that the content of key impurity elements in the fly ash accounts for 2-11% of the total mass of the treated fly ash, and obtaining acid-treated fly ash; (2) mixing the acid-treated fly ash with a first carbon source to obtain a mixture; and (3) covering the mixture with a second carbon source, roasting in a reducing atmosphere to obtain a roasted material which comprises a nano silicon carbide whisker layer and a total impurity layer positioned below the silicon carbide whisker layer, and removing the total impurity layer to obtain the nano silicon carbide whisker. According to the preparation method, the low-cost fly ash is taken as a raw material, the advantages of low preparation cost and relatively high product yield can be taken into account through the synergistic effect of moderate acid treatment, raw material position setting and roasting in the reducing atmosphere, and good morphology and relatively high purity of the nano silicon carbide crystal whiskers are ensured.

The invention relates to the technical field of functional board manufacturing, in particular to a damp-proof and wear-resistant composite board and a laminating process thereof. The composite material is prepared from 40-50 parts of dithiocar-bamate modified epoxy resin, 30-40 parts of nano silicon dioxide-carbon quantum dot modified polyurethane, 5-8 parts of a graphene-silane-metal organic framework compound, 2-4 parts of magnetic field oriented silicon carbide whiskers and 1-3 parts of self-repairing microcapsules. The modified epoxy resin is prepared from epoxy chloropropane and mercapto silane through a reaction, the graphene compound is embedded into the ZIF-8 nanoparticles, and the silicon carbide whiskers are directionally arranged through a 0.5-1T magnetic field during lamination; the plate is of a three-layer structure, covalent bonds are formed among layers through a silane coupling agent, and the plate has moisture-proof, wear-resistant and self-repairing functions. The composite material is low in water absorption rate, high in wear resistance frequency, high in microcrack repairing efficiency, high in interlayer bonding strength, capable of being stably used in high and low temperature environments, efficient in preparation process and suitable for the fields of high-end buildings, electronic equipment and the like, and the moisture-proof grade reaches IP67.

The invention relates to the technical field of electrode paste, in particular to electrode paste for a submerged arc furnace and a preparation method of the electrode paste. Comprising three-level grain size distribution anthracite aggregate which is electrically calcined at high temperature and modified by a KH-550 silane coupling agent, a modified silicon carbide whisker and boron-doped graphene-like carbon nitride composite filler, a maleic anhydride-mediated compatible medium-temperature pitch-polyborosiloxane binder and a graphite powder-borax functional additive. A step-by-step mixing and two-stage sintering process is adopted in the preparation process, a covalent bond interface bridging structure is constructed through the coupling agent, the composite dispersing agent regulates and controls the multi-dimensional network distribution of the filler, and the process synergistically improves the compactness and the interface bonding force of the green body. The electrode paste is firm in interface bonding, can form a ceramic protective phase at a high temperature, has excellent conductivity and mechanical strength, and prolongs the service life of the electrode paste for the submerged arc furnace.

The invention discloses a high-thermal-conductivity insulating electric power engineering material and a preparation method thereof, and relates to the technical field of insulating material preparation. The composite material is prepared from 40-60 parts of polyimide resin, 20-30 parts of boron nitride nanosheets, 10-15 parts of alumina micro powder, 5-10 parts of a silane coupling agent, 3-8 parts of a plasticizer, 2-5 parts of an antioxidant, 1-3 parts of carbon nanotube whiskers, 1-2 parts of graphene quantum dots and 0.5-1 part of rare earth yttrium oxide. The diameter-thickness ratio of the boron nitride nanosheet is 100-200, the particle size of the alumina micro powder is 1-5 [mu] m, the diameter of the carbon nanotube whisker is 5-20 nm, the length is 1-5 [mu] m, and the particle size of the graphene quantum dot is 2-10 nm; all the raw materials are synergistically matched, so that the material is expected to have high thermal conductivity and excellent insulating property and is suitable for the field of electric power engineering. The material has high thermal conductivity and excellent insulativity, the thermal conductivity coefficient is not lower than 5 W / (m.K), the volume resistivity is not lower than 1015 omega.cm, and the breakdown field strength is not lower than 30 kV / mm.

The invention discloses a high-temperature-resistant and corrosion-resistant aluminum alloy material and a preparation process thereof, and relates to the technical field of aluminum alloy materials. The high-temperature-resistant and corrosion-resistant aluminum alloy material is prepared by carrying out micro-arc oxidation treatment on aluminum alloy, carrying out plasma spraying on a corrosion-resistant spray coating and carrying out heat treatment. The aluminum alloy comprises the following raw material components in percentage by weight: 0.05%-0.15% of silicon, 0.1%-0.2% of iron, 1.2%-1.5% of copper, 0.7%-0.9% of manganese, 2.5%-3.8% of magnesium, 10.2%-12.4% of zinc, 0.02%-0.04% of titanium, 0.08%-0.15% of zirconium, 0.2%-0.4% of scandium, 0.5%-0.8% of silicon nitride whiskers, 0.5%-1% of an aluminum-coated graphene material and the balance of aluminum.

The invention provides modified zirconium silicate whisker reinforced aluminum oxide ceramic as well as a preparation method and application thereof, and belongs to the technical field of new materials. The preparation method comprises the following steps: modifying the surface of alumina powder with a silane coupling agent with sulfydryl to generate zirconium silicate in situ, uniformly mixing the zirconium silicate with zirconium silicate whiskers which are treated by hydrogen peroxide and modified by phytic acid and tannic acid and a CeO2-Y2O3-MgO-SiO2 compound, and performing spark plasma sintering to obtain the modified zirconium silicate whisker reinforced alumina ceramic. The modified zirconium silicate whisker reinforced aluminum oxide ceramic prepared by the invention has better interface bonding force, excellent mechanical properties and good wear resistance, realizes ceramic densification, and has wide application prospects.

The invention relates to a low-temperature sintered self-reinforced mullite whisker porous ceramic and a preparation method thereof. According to the preparation technology disclosed by the invention, the sintering temperature is successfully reduced while the toughening performance of the material is remarkably improved, which has an extremely important influence on reduction of the production cost and optimization of the material performance. The porous ceramic with an in-situ mullite whisker skeleton is prepared by combining an in-situ whisker generation method, a pore-forming agent adding method and a sintering aid method. The optimal synthesis process of the mullite ceramic is obtained by accurately regulating and controlling the raw material ratio, the sintering temperature and the pore-forming agent type. In addition, growth of mullite crystal nucleuses is promoted through the synergistic effect of the sintering aid and the whisker catalyst, and low-temperature sintering of the mullite ceramic is achieved. The invention aims to explore and realize an optimization method for low-temperature sintering, toughening and strengthening, so as to promote the development and application of the porous mullite ceramic in a plurality of application fields such as sound absorption, heat preservation, filtration and catalyst carriers.

The invention discloses stable zirconia high-toughness ceramic and a preparation method thereof.The stable zirconia high-toughness ceramic comprises a base material, a reinforcing phase and an interface transition zone, the base material is Y2O3-ZrO2 nano powder, the reinforcing phase comprises compact layers and porous layers which are alternately distributed, the compact layers enable alumina whiskers to be radially distributed in the radial direction, and the porous layers enable the alumina whiskers to be evenly distributed in the radial direction; a crystal whisker-nano particle-matrix three-stage toughening network is formed, a porous layer contains beta-Si3N4 crystal whiskers generated in situ, and an interface transition region is a ZrO2-beta-Si3N4 eutectic layer. According to the invention, the whisker is added, the fracture energy is consumed through the pull-out effect, the nano-particles inhibit crack propagation through the pinning effect, the matrix phase change is toughened, the fracture toughness of the ceramic is improved, and the crack propagation path is prolonged by 3-5 times. On the other hand, the sintering temperature is reduced, so that energy consumption is reduced.

The invention relates to the technical field of corrosion-resistant materials for electrolytic baths, in particular to a corrosion-resistant material for an electrolytic bath and a preparation method of the corrosion-resistant material. The corrosion-resistant material for the electrolytic bath is prepared from the following raw materials in parts by weight: 100 parts of polypropylene, 18 to 22 parts of microcapsule coated calcium sulfate whiskers, 5 to 7 parts of polypropylene grafted maleic anhydride, 2 to 4 parts of boron nitride, 0.4 to 0.8 part of antioxidant and 0.4 to 1 part of lubricant. According to the corrosion-resistant material for the electrolytic cell, provided by the invention, the prepared corrosion-resistant material for the electrolytic cell has excellent corrosion resistance, good self-repairing capability and high comprehensive mechanical properties.

The invention belongs to the technical field of composite ceramics, and discloses a synergistically reinforced silicon nitride composite ceramic, and a preparation method and application thereof, the raw materials comprise the following components by mass: 40-90 parts of alpha-Si3N4; 8-15 parts of a sintering aid; 0.1 to 15 parts of nano TiN; 0.1 to 12 parts of SiCw (silicon carbide w); in the sintering aid, the mass ratio of Al2O3 to Y2O3 to CaF2 is (5-10): (1-5): (0.5-3). According to the invention, the nano TiN particles and directionally arranged SiCw are creatively added, and freeze drying and hot pressed sintering technologies are combined, so that the problem that strength and toughness of Si3N4 ceramic are difficult to synchronously improve in the prior art is solved, and the defect of poor toughening effect caused by random distribution of a whisker toughening phase in a matrix is overcome. By accurately regulating and controlling the microstructure, uniform dispersion and directional arrangement of a reinforcement phase are realized, the toughening potential of the whisker is fully exerted, and the comprehensive mechanical property of the Si3N4 ceramic is remarkably improved.

The invention relates to a core-shell structure whisker toughened hard alloy. The core-shell structure whisker toughened hard alloy comprises a hard alloy matrix and a core-shell structure whisker, the core-shell structure whisker comprises a tungsten core part and an outer tungsten carbide shell layer. According to the core-shell structure whisker toughened hard alloy provided by the invention, the core-shell structure whiskers are added into the hard alloy, and the obdurability of the hard alloy is improved by utilizing the obdurability of the tungsten core part; the outer tungsten carbide shell layer is utilized, the hardness of the whisker is improved, the carbon content of a hard alloy system can be balanced in the sintering process, the wettability between the whisker and a hard alloy matrix is improved, sintering densification is promoted, and the interface bonding force between the whisker and the hard alloy matrix is improved. And finally, the strength and toughness of the hard alloy are improved on the premise of not obviously reducing the hardness of the hard alloy.

The application relates to the technical field of ceramic materials, and provides a SiC-whisker-reinforced alumina ceramic material with whisker directional arrangement and a preparation method thereof. SiC whiskers are magnetically modified by being coated with cobalt, then the magnetically modified SiC whisker powder is mixed with Al2O3 ceramic slurry which has been ball milled, and sodium polystyrene sulfonate is added to the mixture for sufficient mixing in a dispersing machine. Then, an electric field and a magnetic field are simultaneously applied to the mixed solution, so that the SiC whiskers are turned under the action of the electric field and the magnetic field, and directional arrangement of the SiC whiskers in a certain direction is realized. The solution is immediately transferred into a freeze-drying machine to freeze and fix the directional arrangement, and then vacuum sublimation drying is carried out at low temperature, so that the Al2O3-Y2O3-SiC ceramic material with SiC whisker directional arrangement is prepared. w The mixed powder is subjected to hot-pressing sintering to prepare the SiC-whisker-reinforced alumina ceramic material with obvious whisker directional arrangement. The ceramic material can be used for preparing a ceramic cutting tool, and is used for high-efficiency cutting of a nickel-based high-temperature alloy.

The invention discloses a rotor coaxial heat dissipation structure, a fluorine-containing metal-based lubricating composition and application of cooperation of the rotor coaxial heat dissipation structure and the fluorine-containing metal-based lubricating composition in a motor rotor shaft, and the rotor coaxial heat dissipation structure and gradient functional coatings sequentially formed on the surface of the motor rotor shaft comprise a bottom layer used for leading out winding heat; the transition layer is used for solid lubrication and PFPE heat triggering slow release; the surface layer is used for reducing friction and repairing microcracks; a micro-pit array and a spiral flow guide groove which are machined through laser are formed in the outer portion of the surface layer. According to the invention, a gradient functional coating three-layer synergistic structure is adopted to construct a gradient framework of a bottom layer (a heat conduction band nano reinforced phase), a transition layer (oriented whiskers and slow-release lubrication) and a surface layer (magnetic response self-repairing), so that the problem that heat management, wear resistance and self-repairing functions of a traditional coating are difficult to be compatible is solved; and meanwhile, through the combined design of the laser micro-pit array (liquid storage and resistance reduction) and the spiral flow guide groove (strengthening the flowing of the cooling medium), the heat dissipation efficiency is cooperatively improved.

The invention relates to the technical field of preparation of high-purity electronic aluminum alloys, in particular to a porous silicon carbide filtering material, a preparation method and application, a SiO2 thin film is formed on the surface of silicon carbide, a sintering neck is formed by utilizing the synergistic effect of the SiO2 thin film and a composite oxide sintering aid, aggregate particles are effectively connected, the bearing capacity of the sintering neck is remarkably improved, and the porous silicon carbide filtering material is prepared. The porous silicon carbide ceramic filter material has the advantages that the porous silicon carbide ceramic filter material is used as a raw material, the compressive strength and thermal shock resistance of the porous silicon carbide ceramic filter material are further improved, the service life of a filter is prolonged, small-size pores are formed by using 9Al2O3. 2B2O3 whiskers generated by in-situ reaction of aggregate particles and B2O3 and Al2O3 on the surface of a sintering neck, and the porous silicon carbide ceramic filter material with pore bimodal distribution is obtained. The pore size distribution and the porosity of the porous silicon carbide ceramic filtering material are optimized, and the problems that the pore size distribution among silicon carbide aggregates of an existing porous ceramic material is single, the overall strength is limited, and the filtering precision and the filtering service life are difficult to meet the higher aluminum melt purification requirement are solved.

The invention discloses a titanium carbonitride-based metal ceramic alloy with a dispersive distribution micro-nano twin-crystal core ring structure and a preparation method thereof, the metal ceramic alloy comprises hard phase powder, hard phase powder, hard phase powder and hard phase powder, the hard phase powder comprises TiCN powder, TiC powder and WC powder, and the hard phase powder comprises TiC powder, TiC powder and WC powder; binding phase powder and multi-component alloy strengthening powder. According to the core-ring shell composite crystal grain, the core is 50-200 nm superfine TiCN crystal grains (high-hardness phase), and basic strength is provided; according to the annular shell, the core is wrapped with the oriented-growth TiCN whiskers with the large length-diameter ratio, the whisker bridging effect is formed, and the crack path is deflected. And dispersion bicrystal distribution: micron-sized coarse grains and submicron fine grains are in bimodal distribution according to the volume ratio of 7: 3, the coarse grains hinder crack propagation, and the fine grains inhibit grain boundary slippage. In-situ reaction strengthening: MoSiB and other components are added, a MoO / TiO self-lubricating film is generated in high-temperature friction, the wear rate is reduced, and negative wear is realized.

The invention relates to the technical field of ceramic air inlet channels, in particular to an integral forming method of a ceramic hollow air inlet channel. The ceramic hollow air inlet channel comprises the following raw materials in parts by weight: 60-80 parts of silicon nitride, 4-6 parts of magnesium oxide, 4-6 parts of filler, 2-4 parts of silicon dioxide, 2-4 parts of modified tetrapod-like zinc oxide whiskers, 2-4 parts of aluminum oxide and 1-3 parts of lanthanum oxide. The thermal expansion matching property of the basalt fiber and the silicon nitride is further optimized through coating of the silicon dioxide, the cracking phenomenon during high-temperature sintering is reduced, the effect of sharing an external load can be achieved by adding the aramid fiber and the polyimide and utilizing the high modulus characteristic of the aramid fiber and the polyimide, meanwhile, crack propagation can be inhibited by utilizing the elastic characteristic of polyurethane, and the thermal expansion performance of the basalt fiber is improved. The epoxy resin and graphene in the modified acrylate improve the crosslinking density and thermal conductivity of the filler, a multi-scale enhanced network is formed, and the strength performance of the ceramic hollow air inlet channel at high temperature is effectively improved.

The invention discloses a method for preparing wave-absorbing integrated SiC / Si3N4 composite ceramic with high strength and toughness in a short period. Silicon nitride, silicon carbide, a sintering aid and other powder are mixed and dispersed for a short time through high-strength mechanical vibration, and the high-strength and high-toughness wave-absorbing composite ceramic is prepared after direct sintering. According to the preparation process, the preparation steps of ball milling, drying, sieving and the like are avoided, the preparation process period of the SiC / Si3N4 composite ceramic can be shortened from 1 week to 1 day, and the labor intensity is reduced; according to the preparation process, an organic solvent and a grinding medium do not need to be introduced, and pollution to samples and the environment is avoided; more importantly, the preparation process can effectively disperse the nano-powder and the whiskers, avoids the damage of a grinding medium to the powder such as particles and the whiskers, and enhances the strength and toughness of the ceramic material. The bending strength of the prepared SiC / Si3N4 composite ceramic can reach up to 1007 MPa, the fracture toughness reaches 11.63 MPa.m < 1 / 2 >, the minimum reflection loss of electromagnetic waves is-27 dB, and the wave absorbing bandwidth is 2.28 GHz.

The invention relates to the technical field of cutting pick machining, in particular to a high-temperature-impact-resistant PDC cutting pick preparation technology, it is guaranteed that the purity and the granularity meet the requirements through selection of raw materials, for example, silicon carbide whiskers and multi-walled carbon nanotubes have high high-temperature resistance, the high-temperature thermal stability of polycrystalline diamond compacts is greatly enhanced through addition of the silicon carbide whiskers and the multi-walled carbon nanotubes, and the high-temperature impact resistance of the polycrystalline diamond compacts is improved through addition of the silicon carbide whiskers and the multi-walled carbon nanotubes; the preparation method comprises the following steps: preparing raw materials, removing impurities on the raw materials through pretreatment to ensure the surface activity so as to facilitate subsequent combination, then removing the surface adsorption phenomenon of the raw materials and avoiding possible oxidation reaction through wet ball milling, sieving and reduction, and then carrying out preliminary forming through low-pressure pre-pressing to discharge air in the raw material powder and improve the pressing density; according to the high-temperature and ultrahigh-pressure sintering process for the polycrystalline diamond compact with the SiCw / CNTs added, the density and the shape of a green body are ensured, and then the finished PDC cutting pick meeting the requirement is obtained through high-temperature and high-pressure sintering, step-by-step pressure relief and finish machining.

The invention discloses an aluminum oxide ceramic composite material and a preparation method thereof, and belongs to the technical field of ceramic materials. The ceramic material is prepared from the following raw materials in parts by weight: 25-40 parts of nano aluminum oxide, 30-45 parts of micron aluminum oxide, 15-20 parts of silicon carbide whiskers, 1.5-3 parts of graphene and 5-7 parts of a sintering aid. The nano aluminum oxide can fill particle gaps of the micron aluminum oxide and improve compactness and hardness, the silicon carbide whiskers are added to improve the toughness of the ceramic material, microwave sintering and hot pressing sintering are combined for application, energy consumption is greatly reduced, grains are refined, the ceramic material has wide application prospects in practice, the preparation method is simple, and the preparation method is suitable for industrial production. And large-scale industrial production can be carried out.

The invention discloses a wear-resistant special ceramic material and a preparation method thereof, and belongs to the technical field of special ceramic preparation. The wear-resistant special ceramic material comprises the following raw materials: zirconium silicate, zirconium oxide whiskers, titanium carbonitride, zinc oxide whiskers, magnesium oxide, petalite, cerium oxide, nickel-based alloy powder and the balance of aluminum oxide. The zirconium silicate, the zirconium oxide whisker, the titanium carbonitride, the zinc oxide whisker and the nickel-based alloy powder are used as combined additives, so that composite synergistic reinforcement and toughening of multiple phases are realized; compared with conventional aluminum oxide ceramics, the prepared wear-resistant aluminum oxide ceramic material has the advantages that the wear resistance, the fracture toughness and the thermal shock resistance are remarkably improved, and the performance requirements of more severe working environments can be met.

The invention relates to the technical field of interface optimization of composite materials, and discloses an interface optimization method of a hollow micron silicon oxide sphere-aluminum nitride whisker composite material, which is applied to a material compounding system comprising a dispersity sensor and an interface regulation and control system in a hot pressing mold. The method comprises the following steps: acquiring spherocrystal dispersion data and interface stress data through a sensor to generate a data set, constructing a dispersion matrix by a regulation and control system, determining material interface combination characteristics, namely processing the matrix, performing thermal field distribution modeling, calculating thermal field distribution gradient and combination prediction information, constructing a coupling regulation and control model, outputting topological distribution characteristics and updating the data set. And finally dynamically regulating and controlling the composite parameters according to the combined characteristics. The method realizes real-time monitoring and accurate regulation and control of the composite material interface, improves the interface bonding quality and the material performance, and is suitable for interface optimization in the composite material preparation process.

The invention relates to an efficient heat-conducting electromagnetic shielding composite material and a preparation method thereof.The preparation method specifically comprises the steps that APTES is adopted for modifying tetrapod-like ZnO whiskers, the tetrapod-like ZnO whiskers are grafted with graphene oxide through an EDC / NHS system, graphene oxide grafted tetrapod-like ZnO whiskers are obtained, and the dispersity and the heat-conducting property are improved; secondly, preparing a Ti3C2Tx nanosheet by adopting an HF etching method, and introducing amino groups through isocyanate-ethylenediamine modification, so that the chemical stability and the interfacial compatibility are improved; and finally, inducing oxidation polymerization of aniline through FeCl3 to obtain a graphene oxide graft / Ti < 3 > C < 2 > T < x > grafted polyaniline composite material, and constructing a uniform conductive network. The material has high thermal conductivity, high shielding performance, flexibility and stability, and is suitable for high-power electronic devices and flexible shielding materials.

The invention provides a mechanical property calculation method of a whisker reinforced metal matrix composite material. The method comprises the following steps: acquiring configuration parameters, geometric parameters of whiskers and geometric parameters of a matrix; judging whether a mesh configuration is generated or not; if the mesh configuration is generated, cell element walls are generated through cell element information based on geometric parameters of the matrix; if the netlike configuration is not generated, cell element walls are not generated; whiskers are generated according to geometric parameters of the whiskers, and conflict detection is carried out through partition, whisker projection and whisker distance; combining the whisker reinforcements and cutting the matrix; performing grid division and material attribute endowing, and setting calculation steps and boundary conditions; and performing finite element calculation, and outputting a tensile stress-strain curve result according to a calculation result. The method can be widely applied to structural modeling of the whisker reinforced metal-based composite material, and is particularly suitable for simulation and performance evaluation of large-scale whisker distribution.

The invention relates to the technical field of oil and gas exploitation, discloses a low-density high-strength ceramsite proppant as well as a preparation process and application thereof, and aims to solve the technical problem that the density and the strength of an existing ceramsite proppant are mutually restricted. The proppant has a core-shell structure with an inner core and an outer shell. The inner core is formed by sintering a first material containing bauxite, clay, a composite pore-forming agent and a carbon-silicon precursor and is used for forming a loose and porous low-density structure, and silicon carbide whiskers are generated in situ in the loose and porous low-density structure for reinforcement. The shell is formed by sintering a second material containing bauxite, clay and zircon sand and is used for forming a compact and high-strength protective layer and generating zirconium oxide particles in situ in the protective layer for toughening. The preparation process comprises the following steps: preparing core-shell structure green pellets by a two-step method, and adopting a double-atmosphere program temperature control sintering process of medium-temperature reduction and high-temperature oxidation. According to the invention, through the combination of the structure zoning and the zoning in-situ enhancement technology, the prepared proppant has ultralow density and excellent crushing resistance.

The invention discloses a preparation method of a multi-element doped symbiotic zinc oxide whisker high-conductivity and high-density sputtering target material and a product thereof, and relates to the technical field of photoelectric materials. The invention discloses a preparation method of a multi-element doped symbiotic zinc oxide whisker high-conductivity and high-density sputtering target material. The preparation method comprises the following steps: preparing doped symbiotic zinc oxide whisker powder; adding a wetting agent and a dispersing agent into the doped zinc oxide whisker powder, and carrying out ball milling to obtain first-stage grinding slurry; the first-stage grinding slurry is subjected to sanding, and second-stage grinding slurry is obtained; drying the second-stage grinding slurry, and granulating to obtain granules; adding a forming agent into the granules, and carrying out compression molding to obtain a green body; and the green body is degummed and then subjected to segmented sintering, and the sputtering target material is obtained. By means of the preparation method, the sputtering target material with high conductivity and high density can be obtained at the same time, and compared with a conventional sputtering target material, the electrical property of the sputtering target material is greatly improved.