1977 results about "Ceramic coating" patented technology

The invention relates to the technical field of metal sliding bearings, and provides a liquid metal sliding bearing with high sealing performance, which comprises a mandrel, a graphite sealing assembly, a flange and a shaft sleeve, and further comprises a ternary gallium-based liquid metal and a silicon carbide ceramic coating, wave-shaped check rings are arranged among the multiple graphite rings at intervals, initial contact loads are provided through the wave-shaped check rings, the graphite rings and the flange are tightly attached, static sealing with excellent performance is formed in the static state, and the fit clearance between the mandrel and the shaft sleeve is filled with ternary gallium-based liquid metal. A silicon carbide ceramic coating is plated at the matching position of the mandrel and the flange, and a silicon carbide ceramic coating is also plated at the matching position of the mandrel and the shaft sleeve. By using the graphite ring, the ternary gallium-based liquid metal and the silicon carbide ceramic coating, the liquid metal has good fluidity, so that the interface can be fully filled, the liquid metal is not easy to volatilize, the lubricating effect is better, the friction factor is low, and the wear resistance is better.

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention discloses a lithium battery diaphragm with a self-repairing function and a preparation method thereof, and belongs to the field of lithium battery diaphragms. The lithium battery diaphragm comprises a polymer base membrane and a ceramic coating, the ceramic coating is coated on one side surface, facing the negative electrode, of the polymer base membrane or two side surfaces of the polymer base membrane; the ceramic coating comprises the following raw materials in parts by mass: 40-50 parts of modified ceramic particles, 4-8 parts of self-repairing microcapsules, 0.5-3 parts of a dispersing agent and 50-60 parts of water; the surfaces of the modified ceramic particles are grafted with amino-phenylboronic acid difunctional silane; chitosan / polyurethane is used as a wall material of the self-repairing microcapsule, and polyisocyanate is used as a core material of the self-repairing microcapsule. When the lithium ion diaphragm is stressed or punctured by dendritic crystals, the polyisocyanate can be released to react and crosslink, the generated cracks are closed, and an ion channel is reconstructed. Through the physical barrier of the ceramic coating and the self-repairing effect of the self-repairing microcapsule, the mechanical strength and the ion transmission performance of the lithium battery diaphragm can be effectively maintained.

The invention provides a polysilazane green special refractory ceramic coating and a preparation method thereof, and belongs to the field of ceramic coatings. The ternary core material composed of titanium carbide, zirconium boride and silicon nitride provides high hardness, oxidation resistance, thermal shock resistance and excellent thermal stability; the silicon dioxide-aluminum oxide composite shell layer remarkably improves the oxidation resistance and reliability of the coating through the synergistic oxidation resistance and crack self-repairing function; the multi-metal oxygen cluster network endows the coating with excellent electrical conductivity, thermal conductivity and corrosion resistance; the intercalated montmorillonite enhances the crack resistance and oxidation resistance through a layered structure and embedded active ions; and the boron nitride coated vanadium carbide particles provide lubricity, oxidation resistance and wear resistance. Through collaborative optimization of multiple components, the comprehensive performance of the coating is comprehensively improved in the aspects of oxidation resistance, thermal conductivity, interface stability, high-temperature performance, mechanical performance and the like, so that the coating shows excellent long-term stability and functionality in an extreme environment.

The preparation method comprises the following steps: brushing ultrahigh-temperature ceramic oxide slurry on the surface of a graphite base material, carrying out first heat treatment to obtain a porous transition layer, then brushing ultrahigh-temperature carbide slurry on the surface of the porous transition layer, and carrying out second heat treatment to obtain the high-temperature-stable and corrosion-resistant multi-layer composite ceramic coating on the surface of the graphite base material. The preparation method comprises the following steps: performing primary heat treatment on the surface of an ultra-high-temperature carbide layer, drying to obtain the ultra-high-temperature carbide layer, performing roughening treatment on the surface of the ultra-high-temperature carbide layer by adopting ultra-high-temperature carbide slurry, performing secondary heat treatment to obtain a rough carbide layer, and performing point pressure on the surface of the rough carbide layer by adopting metal carbide ceramic mixed slurry to obtain dense bulges; according to the method disclosed by the invention, not only can the bonding firmness among the layers be remarkably improved, but also the situation that the graphite base material and the surface protection layer react at high temperature, so that the coating fails and falls off is effectively avoided, the use limit of the protection layer is further enhanced, and the method has a wide application prospect.

The invention discloses a tungsten alloy material containing a silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating and a preparation method of the tungsten alloy material, and belongs to the field of ceramic material preparation. The method comprises the following steps: ball-milling and mixing powder raw materials containing modified silicon carbide, aluminum oxide, silicon dioxide and lead oxide with a solvent, and defoaming to obtain ceramic slurry; the ceramic slurry is brushed on the surface of a tungsten alloy matrix subjected to surface pretreatment, and after drying, vacuum sintering is performed to obtain the tungsten alloy. The compact silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating is introduced to the surface of a tungsten alloy matrix, the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of a tungsten alloy material are remarkably improved, the stability of the coating can be improved through the silicon carbide distributed in a dispersed point shape, the thermal expansion coefficient of the coating is evenly reduced, and the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of the tungsten alloy material are improved. The thermal expansion coefficient difference value between the multiphase ceramic coating and a tungsten alloy matrix is reduced, and the thermal shock resistance of the coating is improved.

The invention relates to a ceramic coating for a gravure etching pot and a coating method of the ceramic coating, and belongs to the technical field of ceramic coatings. The ceramic coating comprises the primer and the finish paint, and the nano silicon dioxide sol, the inorganic pigment and the modified silicon dioxide filler in the primer jointly form a firm primer layer, so that the adhesive force of the coating and a base material is enhanced, and meanwhile, the wear resistance of the coating is improved; the reticular molecular structure of polysiloxane is stable at high temperature, so that the overall temperature resistance of the coating is improved; by adding the hollow glass beads, the density and hardness of the coating can be adjusted, and meanwhile, the heat insulation performance of the coating can be improved; the viscosity of the coating can be optimized by adjusting the contents of formic acid and deionized water, so that the coating is easier to construct and coat; and the polydimethylsiloxane is added into the finish paint, so that the non-stickiness of the coating is remarkably improved, and the surface is smoother and is easy to clean.

According to the battery diaphragm provided by the embodiment of the invention, a ceramic coating embedded with PMMA (Polymethyl Methacrylate) microspheres is coated on a single surface or double surfaces of a base diaphragm, the PMMA microspheres are arranged in a manner that parts of the PMMA microspheres protrude on the outer surface of the ceramic coating and parts of the PMMA microspheres are completely embedded in the ceramic coating, and the embedding depth h of any PMMA microsphere in the ceramic coating meets the condition that h is more than or equal to 1 / 3Dv50 and less than or equal to Dv50. According to the structure, the viscidity of the diaphragm is enhanced, and meanwhile, an electrolyte channel is formed between the diaphragm and an electrode through the protruding microspheres, so that electrolyte infiltration is facilitated; pMMA microspheres embedded in the ceramic coating are mixed in the coating to form supporting points, so that the extrusion resistance of the coating is improved; by adjusting the proportion and the embedding depth of the PMMA microspheres embedded in and protruding out of the ceramic coating, the adhesion of the diaphragm and the extrusion resistance of the coating can be balanced, and the performance of the battery diaphragm is optimized. The invention also provides a preparation method of the battery diaphragm and a secondary battery containing the battery diaphragm.

The invention relates to the field of superhigh-temperature ceramic coating precursor powder, in particular to a preparation method of ZrB2-SiC-ZrSix gradient superhigh-temperature ceramic coating precursor powder. The preparation method comprises the following steps: firstly, taking Zr, B4C and Si as raw materials, mixing according to a proportion, and then briquetting; and putting the briquetting material into a combustion synthesis furnace, and starting a combustion synthesis reaction in a vacuum environment. And after the combustion synthesis reaction is finished, taking out a product, and carrying out secondary crushing to obtain ZrB2-SiC-ZrSix gradient ultra-high-temperature ceramic coating precursor powder. The problem of high-temperature cracking caused by large difference of thermal expansion coefficients of components of a traditional alloying system and a graphite matrix is avoided. The problem that a traditional SiC-based system is difficult to alloy is solved, alloying compounding of the amorphous metal silicide ZrSix is coordinated, and the high-oxygen-barrier strengthening method has the advantage that high-oxygen-barrier strengthening is achieved through multiphase alloying of powder.

The invention relates to the technical field of stainless steel pneumatic cylinder barrels, and particularly discloses a wear-resistant stainless steel pipe for a pneumatic cylinder barrel and a preparation process thereof.The wear-resistant stainless steel pipe for the pneumatic cylinder barrel comprises the steps that firstly, a powder metallurgy method is adopted, tungsten carbide, cerium oxide, chromium nitride and other components are added into stainless steel powder, and the performance of a steel pipe base body is enhanced; the corrosion-resistant alloy layer is deposited on the surface of the steel pipe, so that the corrosion resistance, wear resistance and other properties of the steel pipe are enhanced, finally, a silicon nitride wear-resistant ceramic layer is sintered on the surface of the corrosion-resistant coating, and two lubricants of graphite and molybdenum sulfide are synthesized in gaps and holes of the wear-resistant ceramic layer. The defects on the ceramic surface are blocked; and the ceramic coating is endowed with a self-lubricating function.

An additive manufacturing titanium alloy fatigue performance improving method comprises the following steps that S100, additive manufacturing process parameters such as laser power, scanning speed, scanning spacing and powder laying thickness are optimized in the mode that a large number of experiments and numerical simulation are combined, and the minimum porosity and the optimal fusion effect are obtained; s200, the titanium alloy part obtained after additive manufacturing is subjected to stress relief annealing treatment under the vacuum or inert gas protection atmosphere; s300, shot blasting treatment is conducted on the part, initiation and expansion of surface cracks are effectively restrained, meanwhile, surface grains are refined, and the surface hardness and strength are improved; and S400, a ceramic coating or a metal coating is prepared on the surface of the treated titanium alloy part. According to the method for improving the fatigue performance of the additive manufacturing titanium alloy, the fatigue performance of the additive manufacturing titanium alloy is remarkably improved through comprehensive effects of multiple aspects such as internal structure optimization, residual stress elimination, surface strengthening and corrosion protection.

The invention relates to the technical field of surface engineering, discloses a method and a system for preparing a yttrium fluoride composite ceramic coating through atmospheric plasma spraying, and aims to solve the problems that the yttrium fluoride coating generates a brittle aluminum fluoride layer on the surface of an aluminum substrate due to fluorine ion diffusion, so that the bonding strength is low, and the yttrium fluoride coating is easy to peel off and lose efficacy. The method comprises the following steps: sequentially carrying out mechanical polishing, ultrasonic cleaning and sand blasting roughening on an aluminum base material; preparing composite powder formed by mixing yttrium fluoride, yttrium oxide and nanometer aluminum oxide according to the mass ratio of 75: 20: 5; sequentially depositing a yttrium oxide transition layer, a composite barrier layer and a yttrium fluoride functional layer by adopting atmospheric plasma spraying; and finally carrying out vacuum post-heat treatment. According to the system, through the synergistic effect of the three layers of gradient structures, the transition layer forms an yttrium aluminate metallurgical bonding interface, the barrier layer inhibits fluorine ion diffusion through the dual mechanisms of nanometer aluminum oxide physical barrier and yttrium oxide chemical adsorption, and the functional layer guarantees the plasma erosion resistance. According to the method, the bonding strength of the coating is remarkably improved to 50 MPa or above, the porosity is lower than 3%, stripping is avoided under 500-hour high-energy plasma bombardment, the process cost is reduced by 40%, and the method is suitable for cavity protection of semiconductor etching equipment.

The invention relates to the technical field of spaceflight material forming, in particular to a tension control winding process of a spaceflight carbon fiber composite launch canister, which comprises pretreatment, winding forming, curing and post-treatment. The method comprises the following steps: S1, coating a release agent and a modified coating after processing a core mold, carrying out plasma treatment and eliminating stress; the carbon fiber filaments are soaked in resin containing nanometer components, and are pre-stretched after a hot melting reaction; s2, closed-loop tension control is conducted, winding is conducted according to segmented angles, and modified resin is coated between layers to be overlapped in a crossed mode; s3, stepwise heating and curing, dynamically regulating the pressure and introducing inert gas; and S4, polishing after hydraulic demolding, carrying out sand blasting, carrying out transition layer and ceramic coating, and carrying out multi-dimensional detection. According to the process, the mechanical property and environmental adaptability of the launch canister are improved, the process precision is high, defects are reduced, the forming time is shortened, the rework rate and cost are reduced, the spaceflight requirement is met, and the process is suitable for batch production.

The invention discloses a para-aramid coating diaphragm and a preparation method thereof, the para-aramid coating diaphragm comprises a base membrane, a para-aramid coating and one or two ceramic coatings, the para-aramid coating is connected to one surface of the base membrane, and the ceramic coatings are arranged on the surface of the base membrane; when the number of the ceramic coating is one, the ceramic coating is connected to the other surface of the base membrane or connected to the para-aramid coating; when the number of the ceramic coating layers is two, the two ceramic coating layers are a first ceramic coating layer and a second ceramic coating layer, the first ceramic coating layer is connected to the para-aramid fiber coating layer, and the second ceramic coating layer is connected to the other surface of the base membrane; wherein the para-aramid coating comprises para-aramid, gas phase powder and first ceramic powder, and each layer of ceramic coating comprises second ceramic powder. The para-aramid coating diaphragm disclosed by the invention has good temperature resistance and adhesive property.

The invention discloses a high-specific-energy battery adopting a surface alloying lithium negative electrode and a preparation method of the high-specific-energy battery, a metal simple substance or a metal compound capable of reacting with a lithium foil is dissolved in an organic solvent to form a precursor solution, the precursor solution is sprayed on the surface of the lithium foil for standing and reacting for a period of time, redundant liquid is erased, the solvent is removed through drying, and the surface alloying lithium negative electrode is obtained. And preparing the high-specific-energy flexible package lithium metal battery by adopting a high-specific-energy positive electrode, an ether electrolyte, the surface alloyed lithium negative electrode and a ceramic coating diaphragm in a Z-shaped lamination manner. The surface alloying can promote the uniform deposition of lithium ions and inhibit the generation of lithium dendrites, the barrier formed by the modification layer can effectively prevent the side reaction between electrolyte and lithium metal and play a role in stabilizing an interface, and the high-specific-energy battery prepared from the modified lithium metal has higher cycling stability. The method is simple and feasible, is suitable for large-scale preparation, and provides a feasible way for industrial production.

The invention discloses an internal-cooling-based high-frequency coupling window for a high-power cyclotron. The internal-cooling-based high-frequency coupling window is characterized in that an air knife structure is arranged at the atmosphere end of the internal-cooling-based high-frequency coupling window; two groups of conductor choke units with different lengths are arranged on two sides of a ceramic chip of the high-frequency coupling window based on internal cooling, and the two groups of conductor choke units with different lengths are equivalent to two groups of inductors and are used for forming a double-filter circuit of the high-frequency coupling window; a ceramic coating film is arranged on one side of the ceramic sheet of the high-frequency coupling window; according to the air knife structure, more heat on the surface of the ceramic chip is taken away through compressed air; on one hand, the filter unit and the conductor choke unit form a filter circuit of a high-frequency coupling window atmosphere end; according to the invention, the air knife structure is ingeniously utilized, and enhanced cooling is carried out on the ceramic wafer of the coupling window structure; the inductance value of the coupling window is adjusted by using the conductor choke unit, the standing-wave ratio coefficient of the coupling window is reduced, the surface temperature of the ceramic chip is reduced, and the risk of explosion of the coupling window is reduced.

The invention discloses an integrated preparation method of a large-thickness high-density electrical insulation-corrosion-resistant ceramic coating on the surface of a heat dissipation substrate for a high-power device, and relates to the technical field of surface treatment of aluminum alloys and composite materials thereof. The method comprises the following steps: placing a pretreated substrate as an anode and a stainless steel plate as a cathode in a basic arc suppression type electrolyte, and performing low-temperature soft plasma electrolytic oxidation on the surface of the pretreated substrate by using an asymmetric bipolar pulse micro-arc oxidation technology to grow a large-thickness high-density ceramic layer in situ; specifically, low-temperature soft spark discharge is induced by inserting additional negative pulse voltage, the plasma temperature and energy are stabilized, spark discharge is uniform, and the density is increased by an order of magnitude, so that continuous bombardment with no damage to the surface flatness as the plasma intensity upper limit is carried out on a passive film on the surface of a substrate; and the defects such as pores and cracks are continuously healed and repaired, and the densification of the coating is promoted, so that the aluminum oxide coating with large thickness, high density, high electrical insulation and corrosion resistance is obtained.

The invention belongs to the technical field of asphalt stirring, and discloses an asphalt stirring device based on road and bridge pothole filling, the asphalt stirring device comprises a base, a stirring and scraping mechanism is arranged above the base, the stirring and scraping mechanism comprises a mixing tank, asphalt is fully stirred through the stirring and scraping mechanism, and through a sleeve in the stirring and scraping mechanism, the stirring and scraping mechanism is driven to rotate; according to the double-shaft driving design of the rotating pipe, an efficient and synergistic stirring and scraping system is constructed, the inclined face of an arc-shaped scraping plate is attached to the inner wall of the mixing tank and matched with a wear-resistant ceramic coating, adhered asphalt is scraped in real time in the rotating process, meanwhile, the rotating pipe synchronously rotates, radial stirring is achieved through external stirring blades of the rotating pipe, and a spiral lifting piece pushes bottom asphalt to axially flow; by matching with the turbulent flow effect of the U-shaped heat conduction pipe, the asphalt forms a three-dimensional flow field in the tank, an auxiliary agent and the asphalt are fully fused, the problem of non-uniform mixing caused by traditional single-dimension stirring is solved, the stable performance of the asphalt is guaranteed, and a basic support is provided for crack resistance and water damage resistance after pavement filling.

The invention relates to the field of thermal spraying ceramic coatings, and particularly discloses plasma spraying ceramic powder, a ceramic composite coating and a preparation method of the ceramic composite coating. The plasma spraying ceramic powder is prepared from the following raw materials in parts by weight: 100 parts of nano powder and 10 to 30 parts of silicate glass powder, the nano powder comprises nano Al2O3 powder, nano TiO2 powder, nano CeO2 powder and nano YSZ (Yttria Stabilized Zirconia) powder in a weight ratio of (80-86): 10: 2: (2-8). The plasma spraying ceramic powder has the beneficial effects of being good in fluidity, smooth in surface, high in compactness and good in sphericity degree, and the prepared ceramic composite coating has the beneficial effects of being low in porosity, high in compactness, good in corrosion resistance and long in service life.

The invention discloses a method for preparing an ultrahigh-temperature ceramic coating by an ultrahigh-temperature metal gas source based on a molten salt medium, which comprises the following steps of: mixing low-melting-point salt A, metal fluoride and metal M to obtain a mixture C, putting the mixture C into a first crucible, mixing low-melting-point salt B and metal M to obtain a mixture D, putting the mixture D into a second crucible, putting a carbon base material into a deposition furnace, and performing vacuum drying to obtain the ultrahigh-temperature ceramic coating. Heating the first crucible to melt the mixture C to obtain a melt E, and heating the second crucible to melt the mixture D to obtain a melt F; carrier gas is guided into the first crucible, the carrier gas flow passes through the melt E to form gas flow containing a metal gas source, the gas flow containing the metal gas source is guided into the second crucible, and the gas flow containing the metal gas source is filtered by the melt F in the second crucible to form a pure metal reaction gas source, and finally, a pure metal reaction gas source is introduced into the deposition furnace for deposition of the carbon base material, and the ultra-high-temperature ceramic coating is obtained. The method is easy to operate and low in cost.

The present invention discloses a ceramic coated diaphragm and a preparation method thereof, and a secondary battery. The ceramic coated diaphragm comprises a substrate layer and a ceramic coating, wherein the ceramic coating comprises ceramic particles, a binder polymer and an organic high molecular polymer. Under hot pressing conditions of a temperature of 90°C and a pressure of 4MPa, an organic film is formed on the surface of the ceramic coating after hot pressing, wherein the coverage of the organic film is 0-5%, the value-added permeability per unit coating thickness after hot pressing is 0-15s / 100cc, and the peel strength after hot pressing is above 20gf / 15mm. The separator designed by the present invention still has high peel strength and ion permeability after hot pressing, the internal resistance of the battery is reduced, and the cycle and capacity are correspondingly improved.

The invention belongs to the technical field of battery diaphragms, and particularly relates to a preparation method of polymer glue for a diaphragm coating, the polymer glue, a diaphragm and a battery. The polymer glue comprises polymer particles, each polymer particle comprises a core and a shell, the core comprises a base core and an elastic structure, at least the surface of the base core is provided with holes, the elastic structure at least penetrates through the holes in the surface of the base core, the shell wraps the surface of the core, PDI of the polymer particles is smaller than 1, D50 ranges from 1 micrometer to 11 micrometers, and the glass transition temperature of the material of the base core is not smaller than 50 DEG C; the elastic modulus of the material of the elastic structure is 10-80 MPa, the material of the shell is hot-pressed under the conditions of 55 DEG C and 4 MPa, and the binding power to the pole piece is not less than 5 N / m. The polymer glue does not fill ceramic particles and diaphragm pores, the rate and cycle performance of the battery can be improved, and the ceramic coating prepared from the polymer glue can fully release stress and is not easy to fall off.

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 discloses a composite diaphragm as well as preparation and application thereof in a lithium ion battery, and belongs to the technical field of lithium ion battery materials. The composite diaphragm comprises a base material, at least one ceramic coating and at least one organic polymer coating, wherein the surface of the base material is coated with the at least one ceramic coating and the at least one organic polymer coating. The thickness of the ceramic coating is 1-3 m, and the thickness of the organic polymer coating is 0.3-5 m. And the ceramic coating is prepared by adopting a water-based coating process, so that the heat resistance and electrolyte wettability of the diaphragm can be improved. The organic polymer coating is prepared in an electrostatic spinning mode, and a spherical bead structure is formed by adjusting spinning parameters. Due to the fact that a large number of bead structures are contained, the prepared composite diaphragm shows stable super-hydrophobic performance. And the organic polymer has extremely high heat resistance and cohesiveness to a pole piece, and the diaphragm is endowed with extremely high porosity by the electrostatic spinning preparation process.

The invention provides a wear-resistant coating, a preparation method thereof, a workpiece and a treatment method of the workpiece. The wear-resistant coating comprises polysilazane resin and auxiliary materials, the auxiliary materials comprise the following components in parts by weight: 1-10 parts of an active filler, 5-50 parts of a structural filler, 10-70 parts of a solvent and 0.1-2 parts of a dispersing aid; and the polysilazane resin accounts for 20-40% of the weight of the wear-resistant coating. According to the preparation method disclosed by the invention, the active filler, the structural filler, the solvent and the dispersing aid are crushed and mixed in a ball milling manner, and then are uniformly mixed with the polysilazane resin, so that the wear-resistant coating prepared by the method disclosed by the invention has the characteristics of good wear resistance and strong adhesive force; and the problem that the silicon nitride ceramic coating is easy to crack can be effectively solved through the cooperative use of the polysilazane resin and the auxiliary materials.

The invention belongs to the field of electronic display film materials, and discloses a UV optical film material and a manufacturing method and application thereof.The UV optical film material comprises a base material, a frosted layer, an inner protective film layer, an optical ink layer, a transparent adhesive layer and an outer protective film layer, and the inner surface of the base material is sequentially coated with the frosted layer and the inner protective film layer outwards; the outer surface of the base material is sequentially coated with an optical ink layer, a transparent adhesive layer and an outer protective film layer outwards; the coating process comprises the steps that the viscosity of UV optical ink is controlled to be 16 ''-18'', the outer surface of the base material is coated with the UV optical ink through a precise micro-concave ceramic coating roller, and then UV curing is conducted to form an optical ink layer; coating a transparent adhesive layer on the surface of the optical ink layer, and after curing, coating UV optical transfer adhesive on the inner surface of the base material to form a frosted layer; finally, the surface of the frosted layer and the surface of the transparent adhesive layer are coated with an inner protective film layer and an outer protective film layer respectively. The coating has the characteristics of high hardness and high adhesive force, the surface can be kept uniform, the edge sharpness is high, and discoloration can be effectively prevented.

The invention relates to the technical field of brake disc materials, in particular to a high-wear-resistance anti-corrosion ceramic automobile brake disc and a preparation method thereof. The high-wear-resistance and corrosion-resistance ceramic automobile brake disc is prepared from an aluminum-based composite base material, bonding metal and ceramic through a plasma spraying technology, and the high-wear-resistance and corrosion-resistance ceramic automobile brake disc is prepared in cooperation with an organization structure of a gradient coating. The ceramic coating and the aluminum-based composite base material are designed into the gradient integrated coating with the gradually-changed components, so that the heat insulation performance and the wear resistance of the ceramic coating can be achieved, the good bonding capacity of the ceramic coating and the base body can be guaranteed, the advantages of a metal bonding phase and a hard ceramic phase in the ceramic coating are fully exerted, and the service life of the ceramic coating is prolonged. The bonding force between the ceramic coating and the aluminum-based composite base material is high, the adhesive force is greatly improved, meanwhile, the gradient integrated coating with the gradually-changed components forms the uniform and compact ceramic coating on the surface of the aluminum-based composite base material, and the ceramic coating is high in hardness and high in abrasion resistance.

The invention relates to the field of ceramic matrix composite bolt preparation, in particular to a high-strength ceramic matrix composite bolt production and processing technology which comprises the following steps: obtaining a rod-shaped preform with a cladding structure and a core structure, hanging the rod-shaped preform in a vapor deposition furnace, and depositing a pyrolytic carbon interface layer on the fiber surface of the rod-shaped preform to obtain the high-strength ceramic matrix composite bolt. Carrying out high-temperature treatment; placing the treated rod-shaped prefabricated body in a vacuum dipping barrel; pumping the ceramic precursor slurry into a barrel, carrying out argon pressurization, heating, heat preservation and furnace cooling, then taking out the ceramic precursor slurry, respectively carrying out vacuum cracking treatment under low-temperature and high-temperature conditions, and after heat preservation, naturally cooling the ceramic precursor slurry to room temperature in an argon atmosphere; preparing a silicon carbide matrix to obtain segmented bars; the segmented bars are ground and machined; and a ceramic coating is prepared on the surface of the bolt with the outer threads machined, the ceramic coating is silicon carbide, and the ceramic-based composite material bolt is obtained. The method aims at optimizing the cracking temperature in the cracking treatment process of the ceramic matrix composite bolt.

The invention discloses an anti-adhesion conductive ceramic coating and application thereof to a high-frequency electrotome, and relates to the technical field of surface modification. The preparation method of the anti-adhesion conductive ceramic coating at least comprises the following preparation steps: carrying out cleaning and surface sand blasting treatment on a high-frequency electrotome substrate; blending fusible polytetrafluoroethylene powder, hydrophobic nano silicon dioxide particles and modified fluorinated graphene at a high speed to obtain mixed powder; and the mixed powder is sprayed on the surface of the high-frequency electrotome base body subjected to surface sand blasting through a powder electrostatic spraying technology, and after baking and cooling, the anti-adhesion conductive ceramic coating is obtained. The high-frequency electrotome anti-sticking ceramic coating prepared by the invention has good anti-sticking property, tissue adhesion resistance, electrical conductivity and low possibility of falling off.

The invention provides a lithium ion battery diaphragm as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. Specifically, the lithium ion battery diaphragm comprises a polyimide nanofiber substrate layer, a dynamic cross-linked polyurethane self-repairing layer and a ceramic coating which are connected in sequence, and the lithium ion battery diaphragm also comprises poly (N-isopropylacrylamide) microspheres embedded into the layers. The technical problems that a traditional lithium battery diaphragm is prone to failure at a high temperature, the lithium dendrite penetration risk is high, and the electrolyte wettability is poor can be solved at the same time, through collaborative innovation of materials, structures and functions, comprehensive improvement of safety and electrochemical performance of a lithium ion battery is achieved through the diaphragm layer, and the lithium ion battery diaphragm has good application prospects.