75 results about "Carbide coating" patented technology

The invention discloses a method for preparing a carbide coating with high bonding strength on a graphite surface. The method comprises the following steps: roughening the graphite surface to obtain roughened graphite, coating transition layer slurry on the roughened graphite surface, performing first sintering to obtain a transition layer, coating surface layer slurry on the transition layer surface, and performing second sintering to obtain the carbide coating. According to the preparation method, the synergistic effect of chemical bonding and mechanical embedding is achieved by optimizing the surface roughness, designing the transition layer and sintering the carbide coating, the carbide coating with the high interface bonding force is prepared on the graphite surface, and the preparation method is suitable for surface modification of graphite-based materials under the harsh working conditions of high temperature, high corrosion and the like.

The invention relates to a high-performance hafnium-based ultrahigh-temperature ceramic-based composite material and a preparation method thereof. The method comprises the following steps: depositing pyrolytic carbon on the carbon fiber surface of a carbon fiber preform through a CVD (Chemical Vapor Deposition) method; preparing a hafnium oxide interface layer on the surface of the pyrolytic carbon through an atomic layer deposition method, and performing ultra-fast annealing treatment to form a pyrolytic carbon-hafnium oxide composite interface layer; carrying out a reaction with a matrix containing a pyrolytic carbon-hafnium oxide composite interface layer through an impregnation pyrolysis method; a hafnium carbide coating is prepared on the surface of the composite material matrix through a CVD method; and preparing a hafnium oxide coating on the surface of the hafnium carbide coating through an atomic layer deposition method, and carrying out ultra-fast annealing treatment to prepare the high-performance hafnium-based ultra-high-temperature ceramic-based composite material. According to the preparation method, the pyrolytic carbon-hafnium oxide composite interface layer is prepared by adopting an atomic layer deposition process and depending on ultra-fast annealing treatment, and meanwhile, the hafnium carbide-hafnium oxide composite coating is prepared, so that the mechanical property of the composite material in a high-temperature aerobic environment is remarkably improved.

The present disclosure relates to the formation of thermal protection systems based on the formation of ceramic coatings. Such ceramic coatings may be derived from polymeric resins and may be applied over carbon-carbon (C / C) composites. The ceramic coatings may optionally contain a metal carbide coating.

An organometallic compound is provided which includes a central metal atom; and organic ligands capable of forming polydentate bonds to the central metal atom. Related methods and articles having a metal carbide coating are also provided.

The invention discloses a graphene-based heat conduction film with a stable interface and a preparation method of the graphene-based heat conduction film. When the graphene film is prepared, a substrate with a reticulate pattern structure with a specific size is utilized, on one hand, separation of a graphene oxide precursor film with high surface energy from a matrix is facilitated, and on the other hand, more stable nucleation sites and interlocking interfaces are provided for in-situ growth of subsequent carbides. According to the in-situ growth method, a layer of superhard carbide coating which is compact in structure and is combined through strong chemical bonds can be generated on the surface of graphene in situ, the carbide coating can form a superstable interface with graphene, the graphene film is effectively protected, and the abrasion resistance, impact resistance and space environment erosion resistance of the graphene film are greatly improved.

The invention relates to spherical high-entropy carbide powder and a preparation method of a SiC / high-entropy carbide coating. According to the method, normal-pressure carbon thermal reduction synthesis of high-entropy carbides is realized in a common box-type furnace and in an air atmosphere through a local atmosphere isolation structure of'laying graphite paper, upper graphite powder and covering activated carbon ', then a compact SiC transition layer is generated in situ on a substrate by utilizing a two-step method of'plasma spraying of a pure silicon layer and then high-temperature embedding carburization', and the high-entropy carbide is prepared. And finally, the high-entropy carbide coating is prepared through a thermal spraying method. The process is simple, the cost is low, large-scale preparation is easy, the high-temperature wear resistance and the ablation resistance of the coating can be remarkably improved, and the harsh requirements of the aerospace field and the like for the ultra-high-temperature protective coating are met.

The utility model discloses a wear -resisting alloy gear oil pump relates to gear pump technical field, including oil pump subassembly, and oil pump subassembly includes pump body, end cover, input rod, driving gear and driven gear, and driving gear and driven gear are rotationally installed in the pump body, the utility model discloses a spiral wear -resisting groove is arranged on the tooth top circle surface of gear, and the wear -resisting groove is filled with molybdenum disulfide grease, can form good lubricating effect on the contact surface of gear and other components, reduce friction and abrasion, reduce the metal scrap of abrasion simultaneously, avoid the damage of scrap to other components, in addition, wear -resisting bushing is arranged in the position corresponding to the gear outer circle of the inner wall of pump body, and wear -resisting bushing is made of high -hardness ceramic material, and the surface of side plate and gear end face contact is plated with a layer of hard alloy coating, further improved the wear resistance between each component of gear oil pump, prolonged the service life of whole gear oil pump.

The invention relates to the technical field of coated cutting tools, and provides a high-temperature wear-resistant coated cutting tool and a preparation method thereof.The high-temperature wear-resistant coated cutting tool comprises a base body and a high-temperature wear-resistant coating, and the base body is coated with the high-temperature wear-resistant coating; the matrix is a WC-based hard alloy; the coating comprises a WaAlbSicB2 bonding layer and a Ti < x > Al < y > Si < z > B2 functional layer from inside to outside, wherein the Ti < x > Al < y > Si < z > B < 2 > functional layer is of a columnar crystal layer-equiaxed crystal layer alternating structure and has a grain size, amorphous phase proportion and Al / Si element triple gradient structure in the thickness direction. A double-peak structure design is adopted in the matrix, namely coarse-grain WC constructs a framework, fine-grain WC fills gaps, and the strength and the toughness are synergistically improved through the double-peak structure design; and meanwhile, the micro-texture array is arranged on the surface of the substrate, so that the coating and the substrate form mechanical interlocking, and the film-substrate bonding strength is remarkably enhanced. The cutter has good wear resistance, good toughness, excellent film-substrate bonding strength and good high-temperature oxidation resistance, and is suitable for high-speed cutting of difficult-to-machine materials such as titanium alloy and nickel-based high-temperature alloy.

Coordination complexes are provided comprising at least one metal atom; and organic ligands comprising one or more coordination sites associating with the at least one metal atom. Related methods and articles having a metal carbide coating are also provided, the metal carbide coating being derived from one or more coordination complexes.

This invention belongs to the field of surface strengthening technology, specifically relating to a composite coating resistant to cavitation and abrasion and its preparation method. The preparation method of the composite coating resistant to cavitation and abrasion provided by this invention includes the following steps: (1) preparing a high-elasticity alloy coating on the substrate surface using laser cladding technology; (2) preparing a hard alloy coating on the surface of the high-elasticity alloy coating using flame spraying; and (3) preparing a sealing protective layer on the surface of the hard alloy coating. This method uses laser cladding technology to achieve metallurgical bonding between the high-elasticity alloy coating and the substrate, improving the bonding force between the coating and the substrate, and also has high processing precision, maintaining high quality even for thinner coatings; the hard alloy coating formed by flame spraying has high hardness and good wear resistance, further improving the cavitation and abrasion resistance of the composite coating.

The application provides a high-performance bulletproof ceramic and a preparation method thereof, and the method comprises the following steps: preparing a hard alloy coating on a metal transition layer on the surface of a ceramic base by using a supersonic flame spraying method; then, a plurality of blind hole grooves arranged in a matrix interval are opened on the surface of the hard alloy coating by using a laser etching method; then, the blind hole grooves are filled with soft metal by using the supersonic flame spraying method; after the upper surface of the soft metal in each blind hole groove is polished to be flush with the upper surface of the hard alloy coating, a hard ceramic coating is prepared on the upper surface of the hard alloy coating and the soft metal by using an atmospheric plasma spraying method. The soft metal filled in each blind hole groove of the hard alloy coating captures the broken ceramic to achieve a secondary anti-penetration effect, and the soft area formed by the soft metal and the hard area formed by the hard alloy coating make the bullet body bear uneven stress to achieve the effect of deflecting the penetration path.

The application belongs to the technical field of powder metallurgy, and particularly discloses a nanoscale oxide particle dispersed aluminum-titanium target material and a preparation method and application thereof. x The nanoscale oxide particle dispersed aluminum-titanium target material has a double-layer structure, including a plated raw material layer and a base layer. x The plated raw material layer is composed of Al, Ti and MeO, wherein the mass percentage of Al and Ti accounts for 80-95%, and the mass percentage of MeO accounts for 5-20%; and the base layer is composed of Al and Ti or pure Al. The nanoscale oxide particle dispersed aluminum-titanium target material and the preparation method and application thereof have the advantages that the aluminum-titanium target material preparation process flow is simple, the production efficiency is high, the method is economic and environmentally friendly, and the method is suitable for batch production; the aluminum-titanium target material prepared by the method solves the binding problem of brittle target material, the target material has high density, meets the demand of hard alloy coating film plating, has no cracking problem in the plating process, and has high coating hardness and good wear resistance.

The present invention is a metal carbide-coated carbon material comprising a carbon substrate having carbon as the main component and a metal carbide coating film that coats at least a portion of the carbon substrate, the metal carbide constituting the metal carbide coating film being at least one metal carbide selected from the group consisting of tantalum carbide, niobium carbide, zirconium carbide, hafnium carbide, and tungsten carbide, the chlorine concentration in the carbonized metal coating film is 25,000 ppm [mu] m or less. According to the present invention, it is possible to provide a metal carbide-coated carbon material capable of improving the yield of a semiconductor single crystal by suppressing the occurrence of a polycrystal form during crystal growth and epitaxial growth of the semiconductor single crystal.

The invention belongs to the technical field of hard alloy material preparation, and relates to a hard alloy coating blade for continuous turning of steel parts and a preparation method and application of the hard alloy coating blade. The hard alloy coating blade for continuous turning of the steel part comprises a hard alloy matrix and a multi-layer composite CVD coating deposited on the hard alloy matrix. The hard alloy matrix is prepared from the following raw materials in percentage by mass: 80.0 to 90.0 percent of WC with the Fisher particle size of 4.0 mu m, 5.0 to 8.0 percent of Co, 2.0 to 4.0 percent of (W, Ti) C, 0 to 6.0 percent of (Ta, Nb) C and 0 to 1.5 percent of Ti (C0.3 N0.7). A finer and more uniform WC grain structure can be obtained by using the (Ta, Nb) C solid solution, a stable solid solution phase is formed, and excellent high-temperature comprehensive performance, oxidation resistance and comprehensive mechanical performance are provided.

The utility model relates to the technical field of milling cutters, and discloses a high-speed high-precision hard alloy coating milling cutter which comprises a milling cutter body, a cutter bar, a fixing mechanism and a heat dissipation mechanism, the fixing mechanism is used for fixedly connecting the milling cutter body and the cutter bar, the fixing mechanism comprises a connecting block, the connecting block is integrally formed at the end, away from the cutter head, of the milling cutter body, and a connecting groove is formed in one end of the cutter bar. The connecting block at one end of the milling cutter body is connected with the connecting groove in one end of the cutter bar in an inserted mode, then a screw penetrates through the first fixing hole and the second fixing hole, so that the milling cutter body and the cutter bar are fixedly connected, cooling liquid can be guided into the connecting sleeve through the fixing pipe, and the cooling liquid can be guided into the heat dissipation groove through the liquid guide groove; and then the liquid is discharged through the liquid discharge hole formed in the milling groove of the milling cutter body, so that cuttings and heat generated in the cutting process can be quickly discharged, and the heat dissipation performance and the cutting efficiency of the cutter are improved.

To provide a metal carbide coating material that can suppress deterioration in yield of growth of a single crystal when a metal carbide coating material having at least one cross section of which contour line shape is circular is used for producing a single crystal.SOLUTION: A metal carbide coating material includes: a carbon base material containing carbon as the principal component; and a metal carbide coating film that at least partially coats the carbon base material and contains a metal carbide as the principal component. The metal carbide coating material has at least one cross section of which contour line shape is circular, where the circularity of the circle is 0.01 mm or more and 1.2 mm or less.SELECTED DRAWING: None

This invention discloses a method for eliminating adsorbed carbon on the surface of a carbide coating. The method involves plasma-activating a substrate containing a defective carbide coating, then applying a repair slurry to the surface of the substrate to obtain a repair slurry layer. After drying, the sintering process yields the final product. This method can restore the surface C / M stoichiometry to 0.9-1.03 through a quantitative reaction between the applied slurry and the adsorbed carbon on the coating surface. Simultaneously, the coating becomes dense and defect-free. This method is particularly suitable for repairing coatings on graphite substrate thermal field components used in semiconductor crystal growth, and can significantly improve crystal growth quality.

The application discloses a chemical vapor deposition hafnium carbide coating for repairing a tungsten cathode, and belongs to the technical field of high-temperature electrochemistry and surface engineering. The coating comprises a tungsten carbide gradient transition layer, discrete distributed hexagonal boron nitride nano-islands and a hafnium carbide deposition layer in sequence. The application adopts h-BN nano-islands as a template to induce the growth of HfC nano-pillars, forms strong nano-mechanical interlocking, combines the metallurgical bonding of the WC gradient layer, and endows the coating with super-strong bonding force and thermal shock resistance; the use of nitrogen-free hafnium source ensures the low nitrogen intrinsic high purity of the HfC coating, thereby obtaining excellent high-temperature molten salt corrosion resistance; the h-BN island design with extremely low coverage rate ensures mechanical enhancement while maximizing the maintenance of the low interface contact resistance of the coating system. The method has a wide process window and excellent performance, and can significantly prolong the service life of the tungsten cathode under extreme working conditions.

A thermal spray material feedstock is provided for “flash-carbide” coatings. Flash carbide coatings are thin, dense, and smooth thermal spray coatings that self-activate the substrate. Flash-carbide coatings form and peen the coating to impart compressive stress for good adhesion and corrosion resistance. To achieve this combination of properties and performance, a powder that includes fine, dense, and angular particles is used; however, this powder alone results in a poor deposition efficiency of typically less than 20%. The present disclosure mitigates the poor deposition efficiency of this powder alone by providing a composition having two or more different particles at a specific ratio to improve deposition efficiency with sufficient optimized stress and corrosion properties and, in some cases, an increase in coating performance.

The present disclosure relates to the formation of thermal protection systems based on the formation of ceramic coatings. Such ceramic coatings may be derived from polymeric resins and may be applied over carbon-carbon (C / C) composites. The ceramic coatings may optionally contain a metal carbide coating.

The utility model relates to the technical field of worms, in particular to an anti-impact worm which comprises a main shaft body, a buffer layer, a damping assembly and a supporting ring. Arc-shaped reinforcing ribs are arranged on the outer surface of the main shaft body, the buffer layer is composed of a high-elasticity rubber layer and a hard alloy coating, the damping assembly comprises an end cover, a spring ring and a damping fin, and the supporting ring is provided with a flow guide groove and balls. By optimizing the structural design and material selection, the tooth crest strength is enhanced, the impact force in the punching process is dispersed, the dynamic load is absorbed, abrasion and friction loss are reduced, and the operation stability and durability are improved. The worm solves the problems that in the prior art, under the high-load and impact working conditions, fatigue fracture is prone to occurring, tooth surfaces are abraded, and the impact resistance is insufficient, and the high-performance transmission requirement is met.

The invention provides a carbon-based coating bipolar plate as well as a preparation method and application thereof. The carbon-based coating bipolar plate comprises a metal base material, a metal carbide coating and a carbon-based composite coating which are sequentially stacked, the carbon-based composite coating comprises multiple layers of SP2 hybrid carbon coatings and SP3 hybrid carbon coatings which are alternately stacked, the weight percentage of SP2 hybrid carbon atoms in the SP2 hybrid carbon coatings is 60-75%, and the weight percentage of SP3 hybrid carbon atoms in the SP3 hybrid carbon coatings is 70-85%. Metal carbide is arranged as the middle layer, amorphous carbon of different hybridization types is arranged as the surface layer, the cost of the bipolar plate can be reduced, the binding force between the metal substrate and the carbon-based composite coating is enhanced, SP2 hybridization carbon has good conductivity, SP3 hybridization carbon has excellent corrosion resistance, the reasonable SP2 hybridization carbon and SP3 hybridization carbon content is set, and the service life of the bipolar plate is prolonged. The bipolar plate has good conductivity and corrosion resistance, and the service life of the bipolar plate is remarkably prolonged.

The present invention discloses a method for in-situ growth of a thermal shock-resistant tantalum carbide coating on a carbon-based substrate. The specific steps are as follows: 1) placing the substrate in a deposition chamber of a laser chemical vapor deposition device; 2) evacuating the deposition chamber to below the vacuum threshold, introducing H2, a carbon source, and a carrier gas containing a tantalum source, Ar, and adjusting the deposition pressure and stabilizing it for 1 to 5 minutes; 3) turning on the laser to irradiate the substrate, heating it to the deposition temperature for deposition, and then turning off the carrier gas Ar and the laser after deposition. When the substrate temperature reaches 150°C, turning off the H2 and carbon source, and then evacuating the substrate. Waiting for the substrate to cool to room temperature, a tantalum carbide coating material is obtained on the substrate surface. The bottom of the porous tantalum carbide coating material provided by the present invention, which contacts the substrate, has a porous structure that can buffer thermal shock stress. The surface is composed of dense tantalum carbide, which can provide good protection for the substrate, significantly alleviate the problem of thermal expansion coefficient mismatch between the coating and the substrate, and improve the thermal shock resistance of the coating.

The invention relates to the field of PVD coating matrix pretreatment, in particular to a hard alloy PVD coating matrix pretreatment device. The hard alloy PVD coating matrix pretreatment device comprises a shell, and a treatment groove is formed in the upper end of the shell; the inserting mechanism comprises a lifting plate, a plurality of inserting assemblies are arranged below the lifting plate, each inserting assembly comprises a supporting disc, the upper end of the supporting disc is fixedly connected with the lifting plate through two fixing plates, a plurality of rotating pipes are arranged on the supporting disc in a penetrating mode, and the rotating pipes are rotationally connected with the supporting disc through bearings; and the lower ends of the plurality of rotating pipes are fixedly connected with rotating cylinders. The treatment device is used for pretreatment before nickel-platinum alloy target coating of the cutter and mainly used for ultrasonic acid pickling operation after polishing, during use, residual metal powder on the surface of the cutter can be basically removed before the cutter enters acid liquor, in addition, in the acid pickling process, the acid pickling efficiency can be improved, meanwhile, the service life of the cutter is prolonged, and the service life of the cutter is prolonged. And the influence of possible residual metal powder on acid pickling is effectively avoided.

The application discloses a safe and efficient preparation method of hafnium carbide coating, adopts a laser chemical vapor deposition method, and comprises the following steps: substrate cleaning, equipment connection, substrate placement, equipment vacuumizing, raw material tank heating, reaction environment construction, reaction, laser irradiation on the substrate to start the substrate surface temperature rise to the reaction temperature, then reaction with the precursor gas and the reaction gas to start the deposition reaction, and post-processing, taking out the substrate, and covering the hafnium carbide coating on the substrate surface. The safe and efficient preparation method of the hafnium carbide coating has the advantages that the hafnium carbide coating obtained by the method has extremely high stability, excellent heat shock resistance and ablation resistance, and a high deposition rate, and the required hafnium carbide coating can be obtained only by short-time deposition, the method is convenient to use, short in time consumption, and can effectively reduce resource loss.

The application discloses a multi-layer heterogeneous shielding structure-based ECG main cable and a manufacturing method thereof, and relates to the cable field.The ECG main cable comprises a core group, a composite shielding layer structure and an outer sheath which are sequentially arranged outside the core group, the core group comprises a plurality of twisted pairs, each twisted pair is composed of a signal wire and a ground wire which are asymmetrically twisted, the composite shielding layer structure is composed of a plurality of composite shielding segments which are arranged at intervals along the axial direction of the cable, and the adjacent composite shielding segments are filled with a resistive material, each composite shielding segment comprises, from inside to outside, a spiral copper foil layer, a silver wire polyester braided layer and an amorphous silicon carbide coating layer, the spiral copper foil layer is arranged outside the plurality of twisted pairs, and the outer sheath is arranged outside the amorphous silicon carbide coating layer.The application can realize broadband shielding compatibility, and can realize pure physical structure noise reduction without additional electronic elements, so that the cable is light and low in cost.

The invention discloses a high-wear-resistance charging cable sheath and a production method of a sheath material, and relates to the technical field of cables. Comprising a sheath layer, an arc-shaped groove structure and a nano silicon carbide coating which are sequentially arranged from inside to outside, and the sheath layer is prepared from 90-100 parts of polyurethane, 5-10 parts of a halogen-free flame retardant, 0.1-0.3 part of an antioxidant, 20-30 parts of filler, 0.1-0.3 part of a dispersing agent, 0.5-1 part of a lubricating agent and 0.2-2 parts of an anti-ultraviolet agent; the filler is silane modified acid etching carbon fiber, and is prepared by performing chemical etching on carbon fiber by using an acid etching medium and then performing silane functional modification by using amino functional polysiloxane. The charging cable sheath provided by the invention has excellent wear resistance and flame retardance, balances the relationship with mechanical properties, can adapt to frequent plugging and unplugging of a charging cable in use and friction between the cable and the ground, and prolongs the service life.

The application discloses a kind of interface stable graphene-based heat-conducting films and preparation method thereof.In the preparation of graphene film, the substrate with specific size screen structure is used, which is beneficial to the separation of high surface energy graphene oxide precursor film and substrate, and provides more stable nucleation sites and interlocking interface for subsequent in-situ growth of carbide.In-situ growth method can generate a layer of superhard carbide coating on the surface of graphene, which is dense in structure and combined by strong chemical bond.The carbide coating can form a superstable interface with graphene, effectively protecting the graphene film and greatly improving its wear resistance, impact resistance and resistance to space environmental erosion.

This invention relates to the field of composite material technology, specifically to a one-step method for preparing a metal carbide coating on the surface of diamond powder using dual-target magnetron sputtering technology. The method includes: pretreating diamond particles to remove surface impurities; loading the pretreated diamond particles into a vacuum rolling deposition apparatus, using a metal target and a graphite target as targets, and directly depositing a metal carbide coating on the surface of the diamond particles via dual-target magnetron sputtering in an argon atmosphere. This method eliminates the need for subsequent high-temperature heat treatment, performing the process near room temperature, thus avoiding thermal damage to the diamond and oxidation of the metal coating. The process is significantly simplified, highly efficient, and easy to implement. By controlling the sputtering parameters, a dense, uniform, high-purity, and controllable thickness metal carbide coating can be obtained on the surface of the diamond particles, effectively optimizing the interface between the diamond and the metal matrix, and laying the foundation for the preparation of high-performance diamond / metal composite materials.

The invention relates to the technical field of rotor engines, in particular to a high-wear-resistance and self-lubricating radial sealing fin material. According to the method, the Cr12MoV alloy tool steel is used for preparing the metal carbide coating through a diffusion method for the first time, and the radial sealing piece suitable for the high-power rotor engine is prepared in cooperation with follow-up treatment. The wear resistance of the sealing piece is improved, the service life of the sealing piece is prolonged, and the technology for achieving noise reduction through material optimization and structure optimization of the sealing piece is provided for the first time. The process is simple and controllable, the obtained product is excellent in performance, and industrial application is facilitated.