3877 results about "Composite coating" patented technology

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

The invention discloses a production method of a high-performance sintered neodymium-iron-boron magnet. The production method comprises the steps of rapid quenching flaking, hydrogen decrepitation mixing, magnetic field forming, multi-stage treatment and composite coating. A nanocrystalline sheet is prepared through a rapid quenching technology, and uniform distribution of a grain boundary phase and rare earth elements is achieved through hydrogen decrepitation and material mixing; forming in a strong magnetic field and applying high pressure to improve the orientation degree; through high-temperature sintering, medium-temperature annealing and low-temperature aging treatment, magnet densification, grain boundary phase reconstruction and a magnetic domain structure are optimized; and finally, the corrosion resistance is improved by adopting a composite coating. The high-performance sintered neodymium-iron-boron magnet produced by the method comprises a main phase alloy, a grain boundary phase additive and a rare earth supplementary phase. Through low-oxygen nanocrystal preparation, grain boundary coordinated regulation and green process integration, compatibility of high performance, low cost and environmental protection is realized, and sustainable development of the rare earth permanent magnet material is promoted.

The invention discloses a micro proportional valve gradient composite coating and a preparation method thereof, and belongs to the technical field of micro proportional valve surface strengthening manufacturing. Aiming at the corrosion-resistant and wear-resistant requirements of the micro proportional valve under the working conditions of strong corrosion, multiple impurities and high pressure difference, the interface strengthening and corrosion-resistant and wear-resistant performance optimization of a metal matrix and a functional coating are combined, and metal / ceramic / polymer gradient material design, spraying parameter suitability research and a coating porosity / bonding strength control method are covered; the valve core and valve seat protection device is suitable for high-efficiency protection technical systems of valve cores and valve seats of precise instruments such as gas chromatographs and mass spectrometers.

The invention belongs to the technical field of protective coatings, and discloses an anti-corrosion, wear-resistant and high-temperature-resistant coating as well as a preparation method and application thereof. The coating comprises a primer, a middle transition layer and a finish; the raw materials of the primer comprise a primer material and a primer curing agent component; the primer material comprises modified epoxy phenolic resin, a primer functional filler, a first mixed solvent, a high-temperature-resistant coupling agent and an anti-settling agent; the raw materials of the middle transition layer comprise a middle transition layer material and a middle curing agent component; the materials of the middle transition layer comprise polyimide modified epoxy resin, a wear-resistant filler, a reactive diluent, a carbon nanotube, a first dispersant and a compatilizer; the raw materials of the finishing paint comprise a finishing paint material and a finishing paint curing agent component; the finishing paint material comprises organic silicon modified fluorocarbon resin, finishing paint functional filler, a second mixed solvent, a second dispersing agent and a flatting agent. According to the invention, a resin-based composite coating system is synergistically designed through multi-phase materials, so that optimal balance of corrosion resistance, wear resistance, toughness and high temperature resistance of the coating is realized.

The invention discloses a composite coated graphite negative electrode material, a preparation method thereof and a lithium ion solid-state battery, and belongs to the technical field of lithium ion solid-state batteries, the composite coated graphite negative electrode material comprises a graphite matrix and a composite coating layer, and the composite coating layer comprises an inner layer amorphous lithium chloride and an outer layer nanocrystalline LiF / Li3N composite phase. Mixing graphite, lithium chloride containing crystal water and ammonium fluoride to obtain a mixed material; placing the mixed material in a microwave reaction cavity, heating the mixed material to 600-700 DEG C at the microwave power of 800-1200 W in an H2 / Ar mixed atmosphere, and keeping the temperature for 20-60 minutes; and cooling the sintered mixed material, grinding, and sieving with a 100-300 mesh sieve to obtain the composite coated graphite negative electrode material with a coating layer thickness of 10-50 nm. The invention provides an innovative amorphous LiCl / nanocrystalline LiF-Li3N gradient coating layer design, the performance of the lithium ion battery is remarkably improved by optimizing an ion migration path, enhancing the interface stability and reducing the process cost, and a new engineering way is provided for realizing high magnification and long cycle performance of the sulfide all-solid-state battery.

The invention discloses a composition based on hollow glass beads and a preparation method thereof, and relates to the technical field of material science. The preparation method comprises the following steps: firstly, constructing a pre-composite functional microsphere with a specific hierarchical structure as a core basic functional unit, then matching with a plurality of components such as a thermosetting resin matrix, a latent curing system, a functional synergistic aid package and a composite solvent system, and matching with a preparation process which has a synergistic effect with the components. The composition based on the hollow glass beads is expected to realize uniform dispersion of the hollow glass beads in a coating system and strong bonding of a microscopic interface on the premise of ensuring the structural integrity of the hollow glass beads. Therefore, the high-performance composite coating material with ultra-light weight, high heat insulation efficiency, excellent mechanical strength and long-term service stability is obtained.

The invention provides a high-stability lithium-rich manganese-based positive electrode material and a preparation method thereof, and relates to the technical field of lithium-rich manganese-based positive electrode materials, and the method comprises three steps of preparation of a homogeneous precursor, solid-state mechanical fusion doping and coating, and high-temperature sintering; a lithium-rich manganese-based precursor is prepared by adopting a homogeneous coprecipitation process, uniform distribution of metal ions is ensured, then an aluminum source, a zirconium source and a fluorine source are introduced as doping agents, phosphate and a titanate coating agent are combined, doping and coating integrated treatment is realized through mechanical ball milling, and the lithium-rich manganese-based composite material is obtained. And finally, mixing with a lithium source in an argon atmosphere, and carrying out high-temperature sintering of temperature programming and staged heat preservation to form a stable composite coating layer in situ. Therefore, manganese ion migration is effectively inhibited through lattice doping, a layered structure is prevented from being converted into spinel or rock salt phase, meanwhile, a nanoscale ion / electron transmission channel is constructed, interface impedance is reduced, and the charging and discharging efficiency under high voltage is improved.

The invention relates to the field of high-temperature anti-oxidation coatings, in particular to a tantalum-tungsten alloy surface high-temperature anti-oxidation composite coating and a preparation method thereof.The coating is composed of two layers of coatings with different components, the thermal expansion coefficients of the coatings and a base body are matched, the thermal expansion coefficients of the coatings are matched, and residual stress and thermal stress are reduced. The coating is prepared by adopting an embedding boriding and slurry melting method, and the used material components comprise ZrB2, MoSi2, 8YSZ, B, La2O3, Al2O3, NaF, TaSi2 and the like. The preparation method specifically comprises the following steps: putting a substrate into embedding powder for boronizing treatment, then mixing a coating material with ethanol and a binder, putting the mixture into a ball mill for wet mixing to prepare coating slurry, spraying the coating slurry on the surface of the substrate, and putting the substrate into a vacuum tube furnace for sintering to prepare a coating, thereby obtaining the high-temperature anti-oxidation composite coating. The binding force between the developed coating and the tantalum-tungsten alloy matrix is strong, and the tantalum-tungsten alloy matrix can be protected from oxidation corrosion or the oxidation rate can be slowed down within 500-2500s at the high temperature (2000 DEG C or above).

The invention discloses an uvioresistant acrylic resin coating and a preparation method thereof, and belongs to the technical field of acrylic resin paints.The uvioresistant acrylic resin coating is characterized in that step-by-step functional design is adopted, a functional polyurethane prepolymer is constructed through prepolymerization reaction and double-bond end capping, fluorosilicone modified acrylate emulsion is prepared through a core-shell emulsion polymerization process, and the uvioresistant acrylic resin coating is obtained. Then carrying out surface silane modification on hexagonal boron nitride and carrying out composite coating to obtain a modified boron nitride auxiliary agent; and finally, carrying out composite emulsification and dispersion compounding on all the components to obtain the anti-ultraviolet acrylic resin coating. Through the synergistic enhancement effect of the fluorosilicone modified core-shell structure and the surface modified boron nitride, the ultraviolet aging resistance and the insulation reliability of the coating are remarkably improved on the basis of keeping high adhesive force, excellent flexibility and impact resistance of the coating; the problems that a traditional acrylic coating is prone to yellowing and pulverization under long-term ultraviolet radiation, and the mechanical property is reduced are effectively solved, and the acrylic coating is suitable for the field of electronic equipment protective coatings with high requirements for weather resistance, mechanical strength and electrical insulating property.

The invention discloses an online composite coating system for an ultrathin copper foil and a modified resin film, and relates to the field of composite coating. The unwinding pretreatment module accurately controls tension and speed of a copper foil and a resin film and cleans and activates the copper foil; the coating liquid preparation and supply module adopts a neural network and other liquid control performance and conveying; the precision coating module controls film thickness by combining a bionic runner coating head with temperature; the composite pressing module intelligently controls a temperature roller and performs gradient cooling; the on-line detection and feedback control module carries out multi-modal detection and fusion data high-speed linkage adjustment on each module. Parameters of the ultrathin copper foil and modified resin film composite coating link are accurately controlled, defects are reduced, the film layer quality and adhesive force are improved, the system environment adaptability and stability are enhanced, the production efficiency and the product percent of pass are improved, and the cost is reduced.

The invention relates to the technical field of biomedical materials, in particular to a titanium implant multifunctional composite coating with anti-active oxygen and anti-inflammatory dual performance and a preparation method of the titanium implant multifunctional composite coating. The coating is composed of a lanthanum oxide (La2O3) nano-particle layer growing on the surface of the titanium implant in situ and queen lily glycoside A (RA) loaded on the lanthanum oxide (La2O3) nano-particle layer and can continuously release La < 3 + > and RA. The preparation method comprises the following steps: performing alkali heat treatment on the titanium substrate; a La (OH) 3 coating is synthesized on the surface in situ through a hydrothermal reaction; the La2O3 nano-particles are calcined and converted into a La2O3 nano-particle layer with a porous structure; and finally loading RA through an impregnation method. The coating can effectively remove ROS, regulate immune inflammatory response, promote osteogenic differentiation and inhibit osteoclast activity, thereby remarkably promoting osseointegration. The problem of osseointegration under the osteoporosis pathological microenvironment is effectively solved, the preparation process is simple and controllable, and the composition is suitable for bone defect repair of osteoporosis patients and has important clinical application value.

The invention relates to the technical field of composite material surface magnetron sputtering coating, and particularly discloses a composite material surface magnetron sputtering coating process and method, and the composite material surface magnetron sputtering coating process comprises the steps of S1, surface treatment, S2, process equipment condition setting, S3, intelligent control, S4, multi-target co-sputtering process, S5, post-treatment and S6, surface topography detection. Through the multi-target co-sputtering technology, multiple layers of composite coatings such as TiN, CrN, Al2O3, ITO and other different functional layers can be deposited on the surface of the composite material, the base material is endowed with the properties such as abrasion resistance, corrosion resistance, insulation and electric conduction, and the comprehensive performance of the coatings is further improved through the synergistic effect of all the layers; the intelligent control system monitors and adjusts sputtering parameters in real time, so that the compactness and uniformity of the film are ensured, the defect rate of the film is reduced, the protection effect of a coating is enhanced, the service life of the coating is prolonged, key parameters such as sputtering power and temperature can be accurately adjusted, fluctuation caused by manual intervention is reduced, and the service life of the coating is prolonged. And the result of each process operation has high consistency.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention provides a wear-resistant, transparent, flexible and fluoride-free super-hydrophobic composite coating and a preparation method thereof. The preparation method comprises the following steps: mixing hydroxyl-terminated polydimethylsiloxane, gamma-aminopropyltriethoxysilane and dibutyltin dilaurate for reaction to obtain a modified precursor solution, adding swelled epoxy resin into the modified precursor solution, and heating for reaction to obtain siloxane modified epoxy resin; the preparation method comprises the following steps: dispersing nano silicon dioxide in an ethyl acetate solution to form a SiO2 suspension; and uniformly mixing the modified epoxy resin with a SiO2 suspension, adding polyether amine as a curing agent, stirring and mixing, and constructing the epoxy resin / hydroxyl-terminated polydimethylsiloxane / nano-silica super-hydrophobic coating on a substrate by adopting an air spraying mode. According to the preparation method disclosed by the invention, the super-hydrophobic coating with excellent transparency and flexibility and good adhesive force and wear resistance can be prepared, and the super-hydrophobic coating has a wide application prospect in the fields of wearable electronic equipment, photoelectric devices and the like.

The invention discloses an amphiphilic chitosan and plant nanocellulose composite coating fresh-keeping material, which is prepared from the following ingredients in percentage by mass: 0.5 to 20 percent of amphiphilic chitosan, 0.1 to 5.0 percent of plant nanocellulose, 0.5 to 10.0 percent of coalescing agents, 0.1 to 3.0 percent of antioxidants and the balance deionized water. Wherein the amphiphilic chitosan is prepared from chitosan, quaternary phosphonium salt and sorbic acid. Amphipathic chitosan of the material has hydrophilic groups such as amino and carboxyl and a sorbate hydrophobic group, has hydrophilicity and hydrophobicity at the same time, and is extremely easy to combine with substances such as a coalescing agent, plant nanocellulose and an antioxidant to form a stable polymeric membrane layer, so that the mechanical property after membrane formation is remarkably improved, and the material has a good application prospect. Meanwhile, the plant nanocellulose particles can be stably coated in the polymeric membrane material layer, so that the mechanical property of the material is enhanced, and lasting and efficient antibacterial and antioxidant effects are realized. The invention further discloses a preparation method and application of the amphiphilic chitosan and plant nanocellulose composite coating fresh-keeping material.

The invention discloses a metal composite lithium iron phosphate solid-phase deposition coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The preparation method of the metal composite lithium iron phosphate solid-phase deposition coated lithium iron manganese phosphate positive electrode material comprises the following steps: S1, preparing a lithium iron manganese phosphate material and sintering; s2, grinding lithium iron phosphate into nano particles, and mixing the nano particles with a sugar source to form lithium iron phosphate nano slurry; s3, transferring into a CVD (Chemical Vapor Deposition) fluidized bed in the lithium manganese iron phosphate cooling and sintering stage, spraying lithium iron phosphate nano slurry, gasifying and drying the lithium iron phosphate material, and coating the surface of the lithium manganese iron phosphate with the lithium iron phosphate material through solid-phase deposition; and S4, carrying out composite coating of carbon and metal oxide on the lithium manganese iron phosphate coated with the lithium iron phosphate to obtain the lithium manganese iron phosphate coated with the lithium iron phosphate. According to the invention, the problem of poor uniformity of lithium iron phosphate coated lithium iron manganese phosphate is solved, the electrical property of lithium iron manganese phosphate is improved, the ferromanganese dissolution is improved, and the cycle performance is improved.

The invention discloses preparation and application of an organic-inorganic interface layer modified zinc negative electrode. The preparation method comprises the following steps: firstly, dispersing organic polymer polylactic acid and zinc sulfide powder into tetrahydrofuran, then coating the surface of zinc foil with the dispersed solution, and drying a solvent at 70 DEG C, so as to prepare the zinc negative electrode modified by an organic-inorganic interface layer. According to the interface layer, zinc ion deposition is regulated and controlled, and the problem of zinc dendrite growth is solved. In addition, the polylactic acid-zinc sulfide composite coating can effectively improve the redox kinetics of zinc ions and improve the coulombic efficiency of the zinc negative electrode. Due to the good ionic conductivity, the interface modification layer can improve diffusion of zinc ions, and the polarization influence caused by the concentration gradient of the zinc ions is relieved. Therefore, the prepared polylactic acid-zinc sulfide composite interface layer modified zinc negative electrode symmetric battery has more excellent cycling stability, the half battery has more stable coulombic efficiency, and the assembled total battery has more prominent capacity retention rate.

The invention discloses a nuclear zirconium alloy cladding high-temperature oxidation resistant composite coating and a preparation method thereof, and belongs to the technical field of nuclear zirconium alloy coatings. According to the preparation method disclosed by the invention, through component gradient structure design, Cr ion pretreatment activation, deposition of a pure Cr inner coating, deposition of a Cr70Al30 intermediate coating and deposition of a Cr50Al50 outer coating are sequentially carried out on the surface of a nuclear zirconium alloy cladding, and the Cr-Cr70Al30-Cr50Al50 composite coating zirconium alloy cladding with a three-layer structure is obtained. According to the method, outward migration of the Al element is effectively limited while the excellent anti-oxidation characteristics of the Cr and Al elements are fully utilized, the coating has the excellent high-temperature oxidation performance, and the requirement for the service performance of the surface coating of the zirconium alloy cladding at the extremely high temperature is met.

The invention relates to the technical field of anti-icing, in particular to a photo-thermal phase change energy storage super-hydrophobic all-weather anti-icing composite coating and a preparation method thereof. Comprising the following steps: S1, preparing a phase change microcapsule of chitosan coated paraffin through a single coacervation method; s2, modifying a carbon nano tube, and adding the modified carbon nano tube into the suspension of the phase change microcapsule to form a composite microcapsule; and S3, uniformly mixing the composite microcapsule with organic silicon. Compared with the prior art, by combining the photo-thermal and super-hydrophobic characteristics and the energy storage effect of the phase change microcapsules, the effect of effectively delaying icing can be achieved, the ice resistance and deicing efficiency is high, the photo-thermal conversion performance is good, the super-hydrophobic performance is good, and surface ice prevention and deicing under the extreme weather condition can be achieved; and the coating can keep effective anti-icing and deicing functions under low-temperature and high-humidity conditions. 2, the nanoparticles are grafted to the surface of the chitosan phase change microcapsule to form an organic-inorganic composite phase change microcapsule, and the flexibility of organic substances and the stability of inorganic materials are combined;

The invention discloses a composite coated silicon-carbon negative electrode material as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The method comprises the following steps of: oxidizing and etching graphite in mixed gas of air and nitrogen at the temperature of between 400 and 500 DEG C to form graphite oxide; the preparation method comprises the following steps: dispersing water-soluble asphalt, graphene, nano silicon, melamine and monoammonium phosphate in water to form a composite liquid; and then mixing the composite liquid with graphite oxide, and then carrying out carbonization treatment. The high-performance silicon-carbon composite negative electrode material is prepared through graphite oxidation etching and a composite coating process, nano silicon is uniformly dispersed in carbon pores which are stably combined on the surface of graphite and have rich mesoporous structures, graphene and a nitrogen-doped carbon layer form a three-dimensional conductive network, and the composite negative electrode material is applied to lithium ion batteries and can be applied to lithium ion batteries. And the lithium ion battery has good low-temperature charging proportion, first efficiency and cycle performance.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The invention discloses a titanium-based hydroxyapatite composite coating and a preparation method thereof. The problems that a traditional coating is weak in interface bonding, single in porosity and mismatched in drug sustained release are solved. The composite coating comprises a gradient component layer and a bionic porous outer layer which are sequentially stacked on the surface of a titanium substrate, wherein the gradient component layer comprises a bottom layer (a titanium-based hydroxyapatite transition layer, 70-80% of HA and bonded through Ti-O bonds) and a middle layer (an HA / bioglass composite layer, 50-70% of HA and 10-20% of bioglass); the bionic porous outer layer is a porous HA layer, the porosity is 40-60%, the porosity is gradually increased in a gradient mode in the direction away from the titanium substrate, surface layer pores are loaded with anti-infection drugs, and inner layer pores are loaded with bone growth factors. The method realizes improvement of the interface bonding strength of the coating, consideration of mechanical and biological activity and staged slow release of the medicine, and is suitable for the field of bone joint implantation.

The invention relates to the technical field of nano materials, and particularly discloses a preparation method of surface modified nano calcium carbonate for a battery diaphragm coating. According to the method, the technical paths of microemulsion confinement crystal form regulation and control, gradient surface modification and boehmite compounding and porosity regulation and control are fused, and the functional nano calcium carbonate adaptive to the battery diaphragm coating is prepared. According to the technical scheme, limestone is used as a raw material, after calcination and digestion, the particle size of nano calcium carbonate is controlled through microemulsion carbonization (a cyclohexane-span 80-n-butyl alcohol system); a silane coupling agent KH560-KH570 is adopted for gradient modification to introduce an electrophilic functional group, boehmite is compounded to form a composite coating, and the porosity is regulated and controlled by adjusting the solid content in coating slurry and the coating speed. The method is stable in process and high in compatibility, and meets the requirements of diaphragm coatings of lithium ion batteries and solid-state batteries.

The invention relates to the technical field of batteries, in particular to a composite solid electrolyte material as well as a preparation method and application thereof. A composite solid electrolyte material comprises a base material and a composite coating layer located on the surface of the base material, the composite coating layer comprises a first coating layer and a second coating layer, the first coating layer is located on the surface of the base material, and the second coating layer is located on the surface of the first coating layer; the matrix material comprises a sulfide electrolyte material; the first coating layer is prepared from Li3PS4 and LiCl; the second coating layer contains LiF and LiPO4. According to the composite solid electrolyte material disclosed by the invention, the first coating layer (Li3PS4 and LiCl) and the second coating layer (Li3PS4 and LiCl) are arranged on the surface of the base material and are coordinated and matched, so that the composite solid electrolyte material has high ionic conductivity and high chemical and electrochemical stability.

The invention discloses a tantalum-tungsten alloy surface layer thickness ratio gradient structure coating and a preparation method thereof, and belongs to the technical field of ultrahigh-temperature anti-oxidation coating preparation. A tantalum-tungsten alloy is used as a substrate, and the surface coating of the tantalum-tungsten alloy is prepared through the following steps: (1) solid-phase embedding boronizing; (2) a ZrB2-MoSi2-ZrSi2 layer is prepared through the combination of slurry fusion sintering and a solid infiltration method; and (3) the ZrB2-TaSi2-Zr6Ta2O17 composite coating slurry is prepared in a sintering mode. The total thickness of the prepared coating ranges from 120 micrometers to 200 micrometers, the thicknesses of all the layers are in an exponential gradient relation: tn = t1 * Kn-1 (t0 = 1, K = 1.2-1.3), the problems of uneven thermal stress distribution between the tantalum-tungsten alloy substrate and the coating and between the layers of the coating and ultra-high-temperature anti-oxidation protection of the tantalum-tungsten alloy are successfully solved, the prepared coating is good in binding force and free of defects such as holes and cracks, and the service life of the coating is prolonged. And the tantalum-tungsten alloy can keep a good anti-oxidation effect for a short time under the extreme high-temperature condition of 2000 DEG C.

The invention relates to the technical field of medical instruments, and discloses an angle-adjustable artificial hip joint prosthesis structure which comprises a thighbone connecting assembly, an acetabulum connecting assembly and a movable part movably connected between the thighbone connecting assembly and the acetabulum connecting assembly. The thighbone connecting assembly comprises a first connecting unit fixedly connected with the movable part, a thighbone stem detachably connected to the lower end of the first connecting unit, and a connecting screw fixedly connected to the upper end of the thighbone stem and in threaded connection with the first connecting unit. The acetabulum connecting assembly comprises a second connecting unit fixedly connected with the movable part and an acetabulum fixedly connected to the second connecting unit. Stable rotating connection is achieved through the double-shaft moving part, and a traditional easily-abraded spherical surface structure is replaced; the locking assembly is matched to realize personalized angle adjustment and locking; the femoral stem can be detached and replaced, and adaptability is improved; the surface composite coating promotes osseointegration and improves biocompatibility, the overall structure stability is high, adaptability is high, and postoperative recovery is fast.

The invention relates to a preparation method of an etching-resistant and wear-resistant Y2O3-AlxOy composite coating. The preparation method comprises the following steps: carrying out ultrasonic cleaning on a corrosion-resistant matrix; performing plasma bombardment cleaning activation on the surface of the corrosion-resistant matrix; a Y2O3 coating and an AlxOy coating are alternately deposited on a corrosion-resistant base body in a double-target magnetron sputtering mode to form the Y2O3-AlxOy composite coating, the sputtering power of a Y target is larger than that of an Al target, and the ratio of x to y in the AlxOy coating is larger than 1. According to the method, the amorphous AlxOy coating dominated by the metal state is introduced into the Y2O3 coating, growth of Y2O3 columnar crystals is continuously broken, crystal grains are refined, formation of intergranular easy-to-etch point locations is inhibited, and an yttrium aluminum oxide composite strengthening phase is formed at an interface, so that plasma etching resistance is improved; the thickness of a single-layer coating in the composite coating is very thin; under the action of growth stress, the structure of the coating presents a wave-shaped microstructure and a soft and hard alternate mechanical structure, and the soft and hard alternate mechanical structure is beneficial to inhibiting generation of transverse cracks, guiding friction crack level expansion, prolonging the friction life of the coating and reducing the wear rate.

The invention relates to the technical field of cable manufacturing, in particular to a low-temperature-resistant torsion wind energy shielding flexible cable and a manufacturing method. The cable comprises a conductor layer, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside, the conductor layer is composed of a plurality of layers of coaxially-sleeved twisted bodies, the twisted bodies are formed by twisting copper wires with composite plating layers on the surfaces, the twisting directions of the adjacent layers are opposite, and the twisting pitches are increased layer by layer from inside to outside; discrete gaps formed by twisting are uniformly filled with elastic microspheres with core-shell structures, shells of the elastic microspheres are made of rubber base materials containing carbon nanotubes, inner cavities of the elastic microspheres are filled with lubricants, the elastic microspheres are broken under pressure to release lubrication, and the elastic microspheres can be subjected to self-fitting circulating grease supply after the pressure is relieved. By designing a multi-layer stranded structure, a lubricating system and an elastic buffering mechanism, the reliability of the wind power cable under dynamic load and low-temperature stress is improved, the service life of the wind power cable under dynamic load and low-temperature stress is prolonged, and the wind power cable is suitable for high-latitude, high-altitude and other extreme-low-temperature wind power scenes.

The invention discloses a bacillus coagulans feed additive and a preparation method thereof, and relates to the technical field of feed additives, the bacillus coagulans feed additive comprises bacillus coagulans spores, the content of the spores is 1.0 * 10 < 8 >-1.0 * 10 < 11 > CFU / g; the protective agent system comprises the following components: maltodextrin or lactose, vegetable protein, polyhydric alcohol and an antioxidant; the invention discloses a microcapsule coating structure. A microcapsule is a two-layer composite coating of an inner layer alginate matrix and an outer layer polycation or polymer coating. According to the invention, bacillus coagulans spores which can still keep high survival rate under short-time high-temperature and low-pH conditions are obtained through screening and fermentation strategies of strains with high sporulation and heat and acid tolerance, the problem that common strains are easy to inactivate in granulation, extrusion and gastric acid environments is solved, the problem of product failure caused by insufficient tolerance of the strains is reduced, and the product quality is improved. And the original biological activity basis is improved, so that the protection effect of the subsequent formula and the coating can be played at a higher starting point, and the zoology effect of the final preparation is improved.

The invention discloses a special aggregate for high-strength UHPC (Ultra High Performance Concrete) as well as a preparation method and application thereof, and relates to the technical field of nano modification. According to the aggregate, high-strength basalt or quartz sand is used as a matrix, continuous graded particles are formed through a multi-stage crushing process, and the particle morphology and size distribution are optimized. The surface of the UHPC aggregate is modified by adopting a nano composite system, and the interface bonding performance of the aggregate and a UHPC matrix is remarkably improved by forming a gradient nano composite coating. And technological parameters are optimized, so that the uniformity and the performance stability of the coating are ensured. The aggregate can significantly improve the compressive strength, breaking strength and durability of UHPC. In the prefabricated bridge wet joint, the aggregate shows excellent construction performance and rapid maintenance characteristics, and can effectively shorten the construction period and prolong the service life of the structure. According to the invention, a high-performance special aggregate is provided for UHPC through a nano modification technology, and the development of ultra-high performance concrete in engineering application is promoted.