586 results about "Ceramic coating" patented technology

The invention provides a battery and an electric device. A positive plate comprises a positive active material, and the positive active material is doped and / or coated with a lanthanum element; the surface of the diaphragm is coated with a ceramic coating; the electrolyte comprises a first solvent, a second solvent, a first additive and a second additive; the first solvent comprises a cyclic carbonate compound, the second solvent comprises a chain fluorosulfonamide compound, the first additive comprises mannitol carbonate sulfate, and the second additive comprises succinonitrile; the lanthanum element is doped / coated on the positive active material, so that the release of lattice oxygen at high voltage or high temperature can be effectively inhibited, and the exothermic reaction activity at the thermal runaway initial temperature is reduced; the first additive and the second additive in the electrolyte respectively form a compact CEI film and an SEI film with high thermal stability on the surfaces of the positive electrode and the negative electrode; the diaphragm ceramic coating provides a physical barrier, the thermal shrinkage temperature of the diaphragm is increased, and internal short circuit is prevented.

The invention provides a high-speed laser cladding metal ceramic coating, a cast iron brake disc and a preparation method and application of the cast iron brake disc. The high-speed laser cladding metal ceramic coating comprises the following preparation raw materials in percentage by mass: 40%-60% of stainless steel, 10%-20% of SiC, 10%-30% of ZrO2, 5%-10% of Ti and 1%-2% of CeO2. According to the coating, the hardness, the wear resistance, the friction coefficient and the toughness of a cast iron matrix can be remarkably improved, and the braking requirement of a motor vehicle under the extreme working condition can be well met. The invention further provides the cast iron brake disc and a preparation method and application thereof.

The invention discloses a water-based poly-ceramic coating material as well as a preparation method and application thereof. The formula comprises a composite base material (40-45 parts of modified waterborne polyurethane resin and 15-20 parts of a waterborne acrylic emulsion), a synergistic curing system (10-12 parts of a blocked isocyanate curing agent and 0.8-1.2 parts of a latent organic zinc salt accelerant), an organic-inorganic reinforced phase (10-15 parts of nano silicon dioxide and 8-10 parts of polysilazane) and a functional aid. The base material and the cosolvent cooperate to make VOCs less than or equal to 30 g / L, a curing system cooperates to realize low-temperature rapid curing, organic-inorganic components cooperate to form a poly-ceramic structure, the coating is adaptive to an existing roll aluminum production line, and the problems of environmental protection, energy conservation and performance of a traditional coating are solved.

The invention belongs to the technical field of battery manufacturing, and particularly discloses a diaphragm with a gradient structure and a preparation method of the diaphragm. The diaphragm with the gradient structure comprises a diaphragm base membrane and a coating layer, the coating layer comprises ceramic coatings with different particle size ranges, and the two faces of the diaphragm base membrane are coated with ceramic particles A with the particle size D50 smaller than or equal to 100 nm and ceramic particles B with the particle size of 200-400 nm respectively. According to the diaphragm with the gradient structure, the porosity on the side close to the positive electrode is small, the porosity on the side close to the negative electrode is large, and therefore a smoother lithium ion transmission channel can be formed on the negative electrode side of the diaphragm, and the requirement for high lithium ion flux is met.

The application discloses a kind of low thermal conductivity high reflectivity five-element co-doped ceramic laser protection coating and preparation method thereof, belong to high-energy laser protection technical field.The protective coating includes the adhesive layer and the reflective heat insulation layer of laminated arrangement, adhesive layer is arranged on the surface of base material, reflective heat insulation layer is arranged on the surface of adhesive layer;Wherein, adhesive layer is formed by spraying one of Ni-Al self-bonding powder, Ni-Mo-Al, NiCrAlY, CoCrAlY and NiCoCrAlY;Reflective heat insulation layer is the ceramic coating of five-element co-doped ZrO2, in ceramic coating, base element is ZrO2, doping component is:Y2O3, Gd2O3, Yb2O3, TiO2 And Ta2O5, after doping, material is single cubic phase structure at 25 ℃-1600 ℃.By multiple oxide doping to ZrO2, the coating can maintain cubic phase at room temperature while having lower thermal conductivity and higher reflectivity, can solve the problems of oxidation reflectivity reduction of metal material, mass loss of ablation material and insufficient heat insulation capacity of heat insulation material in laser protection field, prolong service life.

A hip implant system includes an artificial acetabular cup and an artificial acetabular liner. The liner includes or consists of a metal or an alloy, and is coated at least in sections with a ceramic coating.

The invention discloses metal ceramic MAX-phase composite powder for spraying and a preparation method of the metal ceramic MAX-phase composite powder, and belongs to the field of metal ceramic composite materials. The method comprises the following steps: mixing Ni powder, Cr powder and Cr2AlC nano powder with deionized water, a binder and a dispersant according to a specific ratio, and carrying out wet ball milling to prepare uniform slurry; carrying out spray granulation to obtain primary spherical powder; and finally, carrying out spheroidizing treatment on the primary powder by adopting radio frequency plasma under the protection of inert gas to obtain a final product. The core of the preparation method is that through an optimized two-step process, many limitations in the application aspect of an existing MAX phase material are solved, and the composite powder which is high in sphericity degree, good in flowability, compact in interior and stable in MAX phase component is successfully prepared. The powder can be directly used for thermal spraying, and an ideal raw material is provided for preparing a high-performance MAX-phase metal ceramic coating.

The invention discloses a gradient preparation method of a compact barrier type rare earth ceramic coating, and belongs to the technical field of high-temperature protective coatings. The preparation method comprises the following steps: pretreating a tungsten electrode substrate; sequentially preparing a sensor layer integrated with a distributed optical fiber sensor, a gradient transition layer which is realized by adopting a four-channel synchronous powder feeding technology and has continuous and gradual components, and a self-adaptive layer which is prepared by adopting a laser-induced in-situ synthesis technology and contains high-entropy rare earth zirconate and an intelligent additive; the self-healing layer contains a triple temperature triggering microcapsule system; and finally, post-processing and function activation are carried out. The prepared coating forms an intelligent response type gradient composite structure from inside to outside, has excellent interface bonding strength, thermal shock resistance and high-temperature chemical stability and has damage self-healing and service state real-time monitoring functions, and the service life of the tungsten cathode under the severe working condition is remarkably prolonged.

A sliding arrangement for use in an internal combustion engine is described, comprising a cylinder liner (1) and at least one piston ring (10), wherein the liner (1) has a through-bore defining an inner surface (S) which in turn defines three sections: a first section (2) near the end of the piston stroke, facing the cylinder head (at top dead center, TDC); a second, middle section (3); and a third section (4) near the end of the piston stroke, facing the crankshaft of the engine (at top dead center, TDC), wherein (i) the TDC section (2) of the liner (1) has a surface finish with a first roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”); the middle section (3) of the liner (1) has a surface finish with a second roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”);(1) the BDC section (4) of the cylinder liner (1) has a surface finish with a third roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”), and the roughness value of the middle section (3) is significantly lower than the roughness value of the TDC section (2), and is defined by an essentially very smooth structure of recesses and projections (“valleys” and “raised areas”); and (ii) a ceramic coating (R) is applied to at least part of the contact surface of the piston ring (10) by the physical vapor deposition (PVD) process.

The invention provides an inner hole plasma spraying high-bonding-strength bonding layer and Y2O3 coating material and a preparation technology thereof. The bonding layer comprises a middle transition layer formed after Si and C on the surface of a graphite matrix are subjected to a chemical reaction. The inner hole plasma spraying high-bonding-strength bonding layer provided by the invention is composed of a silicon carbide transition layer generated by in-situ reaction of molten silicon and carbon on the surface of a graphite matrix, and can form a Si-O-M bridged bond with a subsequent ceramic coating, so that interface bonding is converted into chemical bonding from mechanical anchoring, and the bonding strength is improved. And meanwhile, by utilizing the thermal expansion characteristic of silicon carbide between graphite and ceramic, the purposes of buffering thermal mismatch stress step by step on the atomic scale, blocking high-temperature diffusion of carbon elements and endowing the coating with lasting high bonding strength and thermal cycling stability are achieved.

The invention relates to the technical field of optical elements, and discloses a bending-resistant multi-core indoor optical cable and a preparation method thereof. The optical cable comprises an optical fiber unit, a water blocking layer, an inner sheath, an energy dissipation layer, a hydrogen blocking layer, an outer sheath and a gradually-changed braid layer which are sequentially arranged from inside to outside. The energy dissipation layer is formed by spirally twisting a plurality of superelastic nickel-titanium alloy wires and high-strength fibers at a specific pitch, wherein the surfaces of the superelastic nickel-titanium alloy wires are coated with ceramic coatings; and the gradually-changed braid layer is a high-strength fiber braid layer of which the braid density is continuously and gradually changed along the axial direction of the optical cable in a segmented manner. According to the invention, bending mechanical energy is actively dissipated through the spirally twisted superelastic alloy wires, intelligent constraint matched with stress distribution is provided in combination with the external segmented gradient braid layer, and hydrogen embrittlement is inhibited by using a double-layer protection mechanism; the problems that an existing optical cable is prone to fracture and loss is increased sharply due to energy accumulation and stress concentration under repeated bending are systematically solved.

The utility model relates to the technical field of metallurgical equipment heating furnace roller ways, in particular to a roller way cooling water transformation device capable of prolonging the service life of a bearing. Comprising a cooling water pipe, a thermometer and a water flow control valve, the cooling water pipe is arranged around a roller way, a spiral flow deflector is arranged in the cooling water pipe to divide the roller way into three sections, the thermometer is arranged on one side of the roller way, the water flow control valve is arranged on a water inlet of the cooling water pipe, and the cooling water pipe comprises a water inlet pipe and a water return pipe. The cooling water pipe comprises an inner layer and an outer layer, the inner layer of the cooling water pipe is made of a copper alloy material, and the outer layer of the cooling water pipe is made of a ceramic coating material; according to the roller way cooling water transformation device capable of prolonging the service life of the bearing, the heat dissipation efficiency is improved, the return water temperature is reduced, the service life of the bearing is prolonged, water resource waste is reduced, environmental thermal pollution is reduced, the workshop temperature is reduced, and the locking phenomenon is avoided; the service life of the bearing is prolonged and the annual maintenance cost is reduced.

The invention relates to the technical field of laser cladding, and provides a device and method for forming an aluminum alloy cladding layer through synchronous laser cladding and composite ultrasonic peening, and the device comprises a laser cladding head and an ultrasonic peening needle; the ultrasonic peening needle comprises a shaft body; a ceramic coating is arranged on the outer surface of the shaft body; the laser cladding head and the ultrasonic peening needle are located on the same side of a to-be-repaired base body, and the ultrasonic peening needle synchronously follows the laser cladding head, so that the laser cladding head conducts laser cladding on the to-be-repaired base body to form a molten pool, and meanwhile the to-be-repaired base body is subjected to ultrasonic peening. The end face of the ultrasonic peening needle generates peening pressure perpendicular to the to-be-repaired base body on the to-be-repaired base body. According to the method, in the process of forming the aluminum alloy through laser cladding, under the condition of good plasticity, the ultrasonic impact needle with the ceramic coating is adopted, the composite ultrasonic impact mechanical auxiliary field is synchronously followed, and the aluminum alloy laser cladding layer which is nearly free of defects, refined in grain and improved in performance is obtained.

The utility model relates to the technical field of valve faucets, and discloses a valve faucet suitable for a high-temperature environment, which comprises a valve body, the upper end of the valve body is rotatably connected with a valve rod assembly in a penetrating manner, the surfaces of the valve body and the valve rod assembly are coated with ceramic coatings, the upper end of the valve rod assembly is fixedly connected with a handle, and the handle is fixedly connected with the valve body. A water filtering mechanism is arranged at the water outlet end of the valve body, a positioning ring is fixedly connected to the exterior of the upper end of the valve body, a positioning hole is formed in the left end of the interior of the positioning ring, and a positioning mechanism is arranged on the lower surface of the handle; according to the utility model, the water filtering mechanism is arranged, and the water filtering mechanism realizes real-time filtering of impurities in a medium through the modular design of the supporting sleeve and the filter cartridge; the filter cartridge can be quickly detached and cleaned, flow reduction caused by impurity blockage is avoided, the positioning mechanism automatically locks a handle in a positioning hole of a positioning ring through cooperation of a spring and a positioning rod when the valve is closed, and accidental opening of the valve caused by accidental touch, vibration or accidental collision is thoroughly eradicated.

The present invention relates to the field of lithium-ion batteries. Disclosed are a high-energy-density long-cycle-life lithium-ion battery and a preparation method therefor. The specific implementation solution involves: the high-energy-density long-cycle-life lithium-ion battery comprises a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte and an aluminum laminate film casing, wherein the positive electrode sheet consists of a positive-electrode current collector and a positive-electrode slurry applied to a surface of the positive-electrode current collector, and the positive-electrode slurry consists of a positive-electrode active substance, a positive-electrode conductive agent and a positive-electrode binder; the negative electrode sheet consists of a negative-electrode current collector and a negative-electrode slurry applied to a surface of the negative-electrode current collector, and the negative-electrode slurry consists of a negative-electrode active substance, a negative-electrode conductive agent and a negative-electrode binder; the separator is an adhesive ceramic-coated separator; and the electrolyte consists of a solute and a solvent. The present invention comprehensively improves the energy density and cycle performance of a battery cell, the energy density can reach 360 Wh / kg or above, and the electrical performance is good.

The application provides a ceramic-coated lithium ion battery diaphragm with high conductivity and high peeling strength and a preparation method thereof. A 9-micron base film with high porosity (41%±5) is prepared by using a wet process and is combined with a low-Na (<100 ppm) boehmite coating developed by research and development. Since the peeling strength of the boehmite slurry coated diaphragm is low, the low-sodium boehmite and a two-component adhesive (A glue is an acrylic resin emulsion and B glue is a silane coupling agent) and a PVA adhesion aid are used in combination, the baking process is adjusted, the diaphragm resistance is effectively reduced, the adhesion between the ceramic coating and the base film is increased, the peeling strength is improved, the problem of the coating layer falling off of the lithium battery diaphragm is solved, the safety hazards such as battery short circuit caused by the problem are reduced, and the safety of the film and the cycle capacity of the battery are improved.

The application discloses a method for preparing a carbon-carbon heater by means of pitch impregnation, and the carbon-carbon composite material prepared through the process steps of preform preparation, pitch impregnation and solidification, high-pressure pitch impregnation, low-temperature carbonization, repeated impregnation and carbonization and high-temperature graphitization has the advantages of high density and low resistivity, and the photovoltaic single crystal furnace heater is further machined. First, micron composite powder of boron carbide-tungsten carbide is uniformly applied on the surface of the heater and is subjected to high-temperature treatment, so as to form a dense ceramic coating, and then a mixed pyrolytic graphite layer is deposited in a methane-argon atmosphere, and through the above two coating processes, the silicon vapor corrosion resistance of the carbon-carbon heater is significantly enhanced, so that the service stability and service life of the carbon-carbon heater are improved.

This utility model discloses a highly flexible, electromagnetic interference-resistant cable for robots, comprising a double-layer conductor bundle with a Kevlar fiber rope at its center. The space between the inner and outer conductor bundles, and between the inner and outer conductor bundles and the Kevlar fiber rope, is filled with thermoplastic elastomer and foamed silicone. The conductor bundles are spirally twisted in opposite directions at different pitches. The cable is surrounded by braided aramid fibers, an insulation layer, an inner shielding layer, an outer shielding layer, and a sheath layer. The sheath has semi-circular ribs and embedded elastic polyurethane strips. The thermoplastic elastomer is a polyurethane-based material, the foamed silicone is phenyl silicone rubber, the insulation layer is nano-silica modified methyl vinyl silicone rubber, the inner shielding layer is copper foil wrapped with a polytetrafluoroethylene self-lubricating coating, the outer shielding layer is tin-plated copper wire braid, and the sheath layer is a blend of polyurethane and silicone rubber coated with a nano-ceramic coating. This cable exhibits a long dynamic bending life under extreme environments, improves high-frequency shielding effectiveness, and is suitable for high-frequency movements of industrial robots and complex electromagnetic environments.

The invention discloses a wear-resistant B4C-SiC composite coating and a laser preparation method thereof, and belongs to the technical field of composite materials and coating preparation. The wear-resistant B4C-SiC composite coating is prepared by carrying out laser cladding on Si-B4C-SiC composite powder; the Si-B4C-SiC composite powder is prepared from composite ceramic powder by adopting a ball-milling turbid liquid and then adopting a spray granulation method; the composite ceramic powder is prepared from the following components in percentage by mass: 50 to 52 percent of B4C powder, 40 to 43 percent of SiC powder and 5 to 10 percent of Si powder. The method disclosed by the invention comprises the following steps: mixing B4C powder, SiC powder and Si powder with a PVA solution, deionized water and absolute ethyl alcohol, carrying out ball-milling granulation to obtain a composite ceramic powder cladding raw material, and preparing the B4C-SiC composite coating by utilizing a laser cladding method. The prepared B4C-SiC composite ceramic coating has high toughness and hardness, the wear resistance of a base material can be greatly improved, rapid preparation of the wear-resistant coating of the base material in a complex shape is met, and the B4C-SiC composite ceramic coating has remarkable application prospects in the fields of aerospace, automobile manufacturing and the like.

The application discloses an electrochemical device and a diaphragm thereof. The diaphragm of the electrochemical device comprises a base film and a coating layer formed on two side surfaces of the base film. The coating layer comprises a ceramic coating layer and a thermal bonding coating layer. The ceramic coating layer and the thermal bonding coating layer formed on the same side of the base film do not coincide with each other. The thermal bonding coating layer formed on one side of the base film does not coincide with the projection of the thermal bonding coating layer formed on the other side of the base film on the base film. After the diaphragm is hot-pressed with an electrode sheet, the electrode can be effectively fixed, so that the production efficiency of a laminated sheet preparation battery cell process is improved. Meanwhile, the diaphragm also has the advantages of low air permeability, high conductivity, simple production process and the like.

The invention discloses a low-vibration integrated marine variable-frequency air conditioner, and relates to the technical field of marine air conditioners, the low-vibration integrated marine variable-frequency air conditioner comprises a variable-frequency air conditioner body, and a bottom vibration reduction assembly is arranged in the variable-frequency air conditioner body. During use, the outer surface of the rubber anti-vibration pad is coated with the fluorosilane super-hydrophobic coating, the outer surface of the bottom anti-vibration pad is coated with the gradient ceramic coating, and the anti-vibration pad is suitable for a high-salt-mist environment. The bottom vibration reduction assembly and the module vibration reduction assembly are both installed in the variable frequency air conditioner body, vibration energy is directly absorbed in the box body, transmission of vibration to the bottom of the box body is reduced, the influence of vibration on a ship body is reduced from the source, low-vibration operation is achieved, meanwhile, the bottom vibration reduction assembly and the module vibration reduction assembly are protected through the box body, and the service life of the ship body is prolonged. The air conditioner is prevented from being directly exposed in a high-salt-fog environment and making contact with high-salt-fog air for a long time, the aging and corrosion risks are reduced, the service life of each vibration reduction structure is prolonged, and the stability of the air conditioner is improved.

The invention belongs to the technical field of preparation of green special fire-resistant ceramics and functional coatings for continuous casting, and provides a special fire-resistant anti-adhesion ceramic coating for a boron nitride side sealing plate for thin-strip continuous casting and a preparation method of the special fire-resistant anti-adhesion ceramic coating. The preparation method comprises the following steps: forming a hollow structure by taking polymer microspheres as a template, dipping in a cerium salt solution and sintering; preparing coated zirconium boride, mixing zirconium boride with silicon dioxide powder, depositing an aluminum phosphate protective film on the surface of the mixture, and performing heat treatment and curing; compounding the boron nitride sheets and the silicon carbide nanowires, and performing surface treatment to obtain a mixed reinforcing material; the materials are prepared into three-layer slurry with a gradient function, then the boron nitride side sealing plate base body is coated with the bonding layer, the functional layer and the working layer in sequence, low-temperature pre-sintering is conducted on the multi-layer structure, and finally rapid densification of the coating is achieved through the spark plasma sintering technology. And constructing a special fire-resistant anti-adhesion functional layer taking an inorganic ceramic phase as a main body.

The invention provides a low-temperature plasma spraying method for a heat-sensitive polymer matrix and a composite material, and belongs to the technical field of surface engineering. According to the method, through a system process of matrix surface pretreatment, spraying powder drying and low-temperature plasma spraying, the core is that a matrix active cooling technology is adopted in the range of 0-10 DEG C to isolate the plasma arc heat influence, and optimized sand blasting coarsening, powder granularity control and spraying process parameters are matched; and the compact Al2O3-TiO2 ceramic coating with high bonding strength is successfully prepared on a heat-sensitive epoxy resin matrix. The limitation that a traditional thermal spraying technology cannot be used for high polymer materials is broken through, the technological process is simple, the cost is low, and the obtained coating is excellent in abrasion resistance and suitable for meeting the requirement for high performance of the surface of the light high polymer material in the fields of electronic equipment, aerospace and the like.

The present invention relates to a conductive ceramic coating (100) for monitoring the degradation of a ceramic coating (100), the conductive ceramic coating (100) comprising: (a) at least one ceramic filler (1) in the form of at least one of the following: beads, needles, flakes, and particles; (b) at least one conductive filler (2); and (c) a thermosetting resin (3), wherein the at least one conductive filler (2) is dispersed in a mixture of the thermosetting resin (3) and the at least one ceramic filler (1) to form conductive pathways throughout the conductive ceramic coating (100). The invention also relates to a sensor system (200) comprising the coating (100) and a method (800) for detecting the degradation of the coating (100).

The invention relates to the technical field of coatings, in particular to an MOFs enhanced nano ceramic coating material, a preparation method and application of the MOFs enhanced nano ceramic coating material to a heat insulation film. The preparation method comprises the following steps: firstly, coating the surface of Al2O3 / ZrO2 nano composite ceramic with ZIF-8 through an in-situ growth method to form MOFs enhanced nano ceramic composite powder with a core-shell structure; performing amino modification by using an amino silane coupling agent, and grafting polyacrylic acid by using an amidation reaction catalyzed by DCC / DMAP (dicyclohexylcarbodiimide / dimethylaminopyridine), so as to obtain surface carboxylated modified nano ceramic composite powder; and finally, mixing and dispersing the modified powder with organic silicon resin containing hydroxyl functional groups, a polyvinylpyrrolidone dispersing agent, a polyether modified polydimethylsiloxane flatting agent, a polyoxyethylene polyoxypropylene glycerol ether defoaming agent and ethanol to obtain the MOFs enhanced nano ceramic coating material. The coating has low thermal conductivity and high mechanical strength, and the powder has good dispersion stability in the coating, so that the coating can be widely applied to the field of heat-insulating films.

The utility model relates to the technical field of PE pipe cutting, and discloses a cutting device for PE pipe production and processing, which comprises a transportation plate and driving cylinders mounted in four corners of the transportation plate, a restraint plate is mounted at the top end of each driving cylinder, and a cutting component is mounted at the top end of each restraint plate. A pipe hole is formed in one side of the contact middle end of the conveying plate and the restraining plate in a penetrating mode, ceramic coatings A are arranged on the inner wall of the pipe hole in the top end of the conveying plate and the inner wall of the pipe hole in the bottom end of the restraining plate, linear air cylinders are installed in the limiting grooves, the lower ends of the linear air cylinders are located in the inclined discharging grooves, and cutters are installed between the linear air cylinders. The restraining plate moves towards the top end face of the conveying plate, the restraining plate and the conveying plate are used for restraining the PE pipe, a built-in motor operates to promote a moving strip to move towards the top end face of a transverse strip, the PE pipe is clamped through a pipe hole in the top end of the conveying plate and the bottom end of an inverted-U-shaped inserting frame, and a linear air cylinder operates to drive a cutter to move downwards to cut the PE pipe.

The utility model discloses a polypropylene frame nanometer thermal insulation board, which comprises a thermal insulation board body, the outer end of the thermal insulation board body is fixedly connected with an MPP reinforced frame, the thermal insulation board body comprises a protective layer, an electromagnetic shielding layer, a thermal insulation layer, a sound absorption damping layer, a fireproof blocking layer and a lining layer, the protective layer is attached to the electromagnetic shielding layer, and the lining layer is attached to the thermal insulation layer. A traditional silica gel frame is replaced by the MPP frame, a multi-layer functional structure is integrated, the comprehensive performance and the application range of the nanometer heat insulation plate are remarkably improved, the fire endurance breaks through 1.5 hours through double protection of the flame-retardant MPP surface layer and the ceramic coating, leap-type improvement is achieved compared with 0.5 hour of the silica gel frame, and the service life of the nanometer heat insulation plate is prolonged. The aerogel core layer is embedded into the MPP reinforcing ribs, so that the heat insulation and bearing capacity structure is optimized, and the physical performance of the heat insulation plate is improved to a great extent.

This invention provides a multi-metal co-doped WC-Co coating and its preparation method, belonging to the field of metal-ceramic coating technology. The preparation method includes: weighing tungsten, yttrium, cerium, chromium, and vanadium sources, mixing and dissolving them in deionized water, adjusting the pH to 3-4, and obtaining a precursor through co-precipitation, washing, and drying; subjecting the precursor to sequential aerobic calcination, hydrogen reduction, and carbonization treatments to generate a WC phase, resulting in a rare-earth-transition multi-metal co-doped WC-based composite material; using the WC-based composite material, cobalt powder, and additives as raw materials, spraying the raw materials onto the substrate surface via thermal spraying to form a multi-metal co-doped WC-Co coating. The WC-Co coating prepared by this invention incorporates four elements—yttrium, cerium, chromium, and vanadium—forming a multiple synergistic mechanism of grain refinement, interface strengthening, and decarburization inhibition, effectively improving the hardness, wear resistance, corrosion resistance, and toughness of the WC-Co coating.

FIELD: protective coatings.SUBSTANCE: method for forming a protective oxide-ceramic coating on the surface of products made of valve metals and alloys by the plasma electrolytic oxidation method involves immersing the product as an electrode together with a counter electrode in a bath filled with an aqueous alkaline electrolyte, and supplying rectangular pulses of anodic and cathodic voltage to the electrodes using a pulsed power source. Anode and cathode voltage pulses are supplied with a current-free pause between them, the value of which is 4.8 times the duration of the anode pulse. The amplitude values of the cathode voltage pulses range from 85 to 149 V with a pulse repetition frequency from 1000 Hz to 4000 Hz, while the current pulse repetition frequency is additionally regulated.EFFECT: obtaining oxide-ceramic coatings with specified properties under reduced energy conditions, with lower values of cathode voltage.1 cl, 2 ex