88 results about "Cermet" patented technology

This invention provides a powder material that improves flowability and particle breakage strength compared to existing technologies. The powder material of this invention has a dendritic structure (1). The dendritic structure (1) has a superhard alloy composition or a cermet composition.

The present application relates to the field of tool processing, and particularly relates to a processing technology for metal ceramic vertical installation forming groove tool. The processing technology comprises the following steps: step 1: processing a blank into a tool finish with a positioning bevel; step 2: processing a reference plane on the end face of the tool finish at the chip rolling groove, the included angle between the reference plane and the end face is the angle of the tool clearance angle; step 3: processing a tool tooth with a clearance angle and a side clearance angle at the reference plane of the tool finish, and detecting the tooth profile data of the tool tooth, the tooth profile data includes tooth width, tooth depth and angle, the detection of the tooth profile data adopts a projection comparison detection method, a standard tooth profile is fixed on a projection surface, and the tool tooth to be detected is enlarged through projection, if the tool tooth data is correct, the tool tooth data is coincident with the standard tooth profile; and step 4: processing the tool chip rolling groove, and performing passivation and coating treatment on the blade edge. Through the implementation of the present application, the processing and detection efficiency of the forming groove tool is improved.

The present invention is in the field of materials engineering and nanotechnology. More specifically, the present invention discloses: a functional premix comprising nanoparticles and a carrier or compatibilizer; a method of obtaining the premix; a method of altering the properties of a material; and a modified material formed with improved properties. Unexpectedly, the premix of the present invention can be used to alter the properties of different kinds of materials, such as polymers, metals, ceramic materials, and / or composites of different materials. The premix of the present invention has numerous advantages in terms of transportation, use, and incorporation of nanoparticles into different materials. In one embodiment, the present invention provides significant modification of the properties of polymers and, in fact, breaks the existing concepts in this technical field. In another embodiment, the present invention provides advantages in altering the properties of metals and / or ceramic materials.

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.

This invention relates to the field of heat exchange materials technology, and discloses a high-temperature, high-pressure nano-conductivity heat exchange material. The heat exchange material comprises a metal matrix, a linearly distributed metal-ceramic gradient transition layer, and a nano-composite ceramic surface layer. The surface layer consists of 90-95 parts of nano-alumina and zirconium oxide composite powder and 5-10 parts of cubic phase nano-titanium nitride powder. The former is fused and stacked to form a continuous ceramic matrix, while the latter is monodispersed and anchored within it, with adjacent particles in contact. The heat exchange material is prepared by gradient layer spraying with a linearly decreasing plasma current as the ceramic composition increases, followed by back-side cooling of the matrix. The surface layer is sprayed using a coaxial air knife in a reducing atmosphere combined with a low-enthalpy jet to inhibit oxidation and vacuum diffusion annealing. This invention synergistically regulates the above-mentioned structure and interface state to achieve a balance between high thermal conductivity, excellent corrosion resistance, and high bonding strength, which helps extend the service life of heat exchange components under high-temperature and high-pressure environments.

This invention belongs to the field of fuel cell technology, specifically relating to a metal-ceramic material for bipolar plates in proton exchange membrane fuel cells and its preparation method. The metal-ceramic material is a Ta-doped modified niobium-aluminum-carbon material, and the chemical formula of the modified niobium-aluminum-carbon is (Nb... 1‑ x Ta x 2AlC. The modified niobium aluminum carbon material prepared by this invention possesses the excellent properties of both metals and ceramics. This ceramic material exhibits excellent electrical and thermal conductivity at room temperature, a high elastic modulus, and a certain degree of ductility at room temperature, allowing it to be machined like metals and graphite. Simultaneously, it possesses the characteristics of ceramic materials, exhibiting high yield strength, high melting point, high thermal stability, and excellent corrosion resistance. Furthermore, the solid solution doping of Ta at the Nb position of the niobium aluminum carbon material significantly improves the corrosion resistance of the niobium aluminum carbon bulk, enabling it to operate stably in the PFMFC working environment.

This invention belongs to the field of laser additive manufacturing and surface engineering technology, and discloses a ternary boride Mo2NiB2 cermet and its preparation method, as well as an alloy barrel and its preparation method. The ternary boride Mo2NiB2 powder of this invention generates a stable, uniformly dispersed, high-hardness ternary boride hard phase in situ during the cladding process, endowing the alloy layer with excellent resistance to abrasive wear and corrosion. Simultaneously, a collaborative technical equipment system is formed by combining specialized internal hole laser cladding equipment, specially prepared ternary boride Mo2NiB2 cermet powder, and an optimized process integrating synchronous preheating, to overcome the technical bottleneck of internal wall cladding and ensure the acquisition of a dense, firmly bonded, and uniformly performing reinforced layer.

The application discloses a refractory metal-ceramic composite environmental barrier coating adhesive layer material, which is prepared by uniformly mixing HfO2 and Nb through mechanical crushing, and in the adhesive layer material, the mass percentage of HfO2 is 60% to 90%, and the mass percentage of elemental Nb is 10% to 40%. The novel composite environmental barrier adhesive layer material has simple raw material composition, good uniformity, high use temperature and effectively improves the service life of the environmental barrier coating.

The application discloses a bladder pressure closed-loop control system and method with a fiber-optic sensor magnetic suction interface, and belongs to the technical field of medical devices. The application sets an independent backward-inclined fiber-optic sensor magnetic suction interface in a holding dead zone of a proximal end hub of an inner sheath, and guides the fiber-optic sensor to a distal end through a metal microtube welded by a laser in a wall of the inner sheath; a "metal-ceramic composite reinforcement" structure is adopted to embed a fiber-optic Fabry-Perot pressure sensor in a lateral wall of a ceramic beak, and an induction diaphragm of the sensor is configured to face away from a central flow passage of the inner sheath and face a radial periphery of the ceramic beak; the layout realizes complete decoupling of a monitoring path and a surgical execution path in a physical space, and guarantees in-situ and real-time monitoring of intravesical pressure in a strong electromagnetic interference environment. Meanwhile, a millisecond active pressure relief is triggered by a system host when pathological spasm is monitored, and a pressure-time integral (PTI) is calculated in real time to quantify a liquid absorption risk.

The invention discloses a cermet pipe chamfering machine, which comprises a frame, a chuck vertically upwardly installed on the frame and horizontally rotatable, a driving mechanism installed on the frame and used to drive the chuck to rotate, a translation mechanism installed on the frame above the chuck and used to move leftward and rightward, a lifting mechanism installed on the translation mechanism and used to move upward and downward, two extension mechanisms installed on the lifting mechanism and arranged leftward and rightward, the two extension mechanisms being downwardly inclined and oppositely directed, and two grinding wheels respectively installed on the lower ends of the two extension mechanisms. The cermet pipe chamfering machine can improve the chamfering efficiency of cermet pipes and reduce the labor intensity of workers.

The application relates to the technical field of sensors, and particularly discloses a magnesium-based metal ceramic sensitive element for a breathing pump and a preparation method thereof. The sensitive element is prepared by sintering a magnesium-based metal ceramic composition, and the raw materials include a magnesium-zinc-calcium medical magnesium alloy matrix phase, a dual-phase ceramic functional phase compounded by fluorophosphate calcium and magnesium boride, a low-temperature sintering fluxing compatible phase compounded by lithium fluoride and calcium fluoride, a potassium fluozirconate interface bridging modification component and a high-purity indium conductive stabilization component. The sensitive element is prepared through inert atmosphere raw material mixing, drying, powder pre-activation, cold isostatic pressing, double sealing and protection, stepwise low-temperature pulse discharge sintering, forming processing, surface passivation and working condition pre-stabilization treatment. The sensitive element is suitable for medical breathing pump sensing, has good conductivity, creep resistance and biocompatibility, and is suitable for high-frequency alternating working conditions; the preparation method is controllable, can realize low-temperature densification sintering, and guarantees the stability of the element structure and performance.

The application discloses a metal-ceramic connecting method based on core-shell micro-element resistance network metallization and high-entropy metallized ceramics, and relates to the technical field of ceramic matrix composite and metal connection. The method comprises the following steps: core-shell composite powder preparation; pre-layer preparation; controlled path joule heating metallization; and low-stress welding connection. The application solves the problems of local overheating and non-uniform conductivity of insulating ceramic powder in joule heat treatment, utilizes the un-melted ceramic core as a physical "pinning point" to build a rigid support, and makes the solder penetrate to form a strong and tough structure of "reinforced concrete" in brazing, so that the volume shrinkage of the solder of the welding seam is reduced, the problem of thermal stress mismatch of the joint is effectively solved, and reliable connection of large-size ceramic metal with high strength and toughness and low residual stress is realized.

This utility model relates to the field of metal-ceramic powder processing technology and discloses a uniform material mixing device for metal-ceramic powders, including a drum. An auxiliary component includes multiple mounting grooves on the inner wall of the drum, each groove containing an inner liner plate. The outer wall of each liner plate has multiple positioning grooves, and the inner wall of each positioning groove has a protruding plate. One end of each protruding plate has a connecting rod and a piston. The inner wall of each positioning groove has a through groove, and the other end of the through groove has a hydraulic chamber. The inner wall of the hydraulic chamber has multiple cavities, with pressure valves and check valves at the inlet and outlet of each cavity. A spring is installed inside each cavity, and one end of each spring has a pressure plate. This utility model, by installing multiple flexibly retractable protruding plates on the inner side of the liner plate, provides cushioning when the grinding balls descend, reducing the impact on the liner plate and improving its service life. Simultaneously, the protruding plates are connected by hydraulic oil, causing the remaining protruding plates to bounce and disperse the surrounding metal-ceramic powder when impacted by the grinding balls, improving processing efficiency and uniformity.

This invention belongs to the field of biomaterials technology, specifically relating to a porous metal-ceramic composite scaffold for bone repair in diabetes and its preparation method. This invention uses tetrapodized zinc oxide as a three-dimensional stable pore-forming template, constructing an overall preparation route of "high-energy ball milling – t-ZnO template – SPS – etching," achieving uniform composite of high-melting-point metal and bioactive ceramic. This results in a porous metal-ceramic composite scaffold with uniform tissue structure, strong interfacial bonding, controllable pore structure, adjustable mechanical properties, and multiple bioactivities including osteogenic, immunogenic, and vascularization activities, significantly improving post-implantation bone integration efficiency and biofunctionality.

A 3D printing method of cermet composite product, comprising the following steps: S1, printing a ceramic framework, printing the ceramic framework by using a binder jetting 3D printing method; S2, printing a sand mold, designing a matching sand mold three-dimensional model by using a three-dimensional modeling software, and printing the sand mold by using a binder jetting 3D printing method according to the three-dimensional model; S3, interface treatment of the ceramic framework, pre-coating a metal activator layer on the surface of the ceramic framework; S4, nesting and assembling the ceramic framework and the sand mold, nesting the interface-treated ceramic framework in the sand mold; S5, infiltration pouring, slowly pouring a metal liquid into a cavity formed by the sand mold and the ceramic framework. The 3D method of the cermet composite product utilizes a metal melt-ceramic skeleton interface reaction control technology, forms a gradient transition layer to improve the bonding strength, and thus prepares a cermet composite material with excellent performance.

The application relates to a hydraulic cylinder part high-sealing protective coating and a protective treatment method thereof, and comprises the following steps: S1, a metal ceramic coating is prepared on the surface of a part by adopting a supersonic flame spraying method, and a first-stage workpiece is obtained; S2, laser micro-melting interface activation treatment is carried out, a metal bonding phase is selectively micro-melted, the surface of the metal ceramic coating is smelted into a metallurgical bonding metal base surface, and a second-stage workpiece is obtained; S3, a high-entropy alloy is sprayed by adopting a high-pressure cold spraying method, the high-entropy alloy is metallurgically combined on the surface of the second-stage workpiece to form a plugging layer, and a third-stage workpiece is obtained; S4, a plurality of oil storage pits are etched on the third-stage workpiece by adopting a laser etching method, and a fourth-stage workpiece is obtained; and S5, a super-hydrophobic functional layer is coated, and the protective treatment is completed. The application can solve the technical problems that the sealing performance of a hydraulic cylinder coating in a high-permeability environment is poor, wear resistance and corrosion resistance cannot be considered at the same time, the hydraulic cylinder is prone to early failure, and the service life of the hydraulic cylinder is limited.

The application discloses a preparation method of a coating metal ceramic wear-resistant coating of a coating doctor blade, and comprises the following steps: weighing Ni20Cr powder and TiB2 powder to prepare a composite powder through high-energy ball milling; drying the NiCr-based ceramic powder prepared after the ball milling treatment; forming a composite coating on the surface of a substrate by using the treated NiCr-based ceramic powder through atmospheric plasma spraying; and forming a remelted coating on the surface of the substrate by using a laser remelting technology to perform a remelting treatment on the composite coating; wherein the remelting treatment comprises a preheating process and a remelting process. The application significantly improves the wear resistance of the coating, reduces the friction coefficient, realizes controllable deposition of the high-performance metal ceramic wear-resistant coating, and the coating prepared by the application can be applied to the surface of the coating doctor blade to improve the wear resistance and service life of the coating doctor blade.

The application provides an intelligent power module with good surge resistance effect, which comprises a metal ceramic substrate, external pins and a high-voltage integrated module formed on the metal ceramic substrate, wherein the high-voltage integrated module comprises a first inverter circuit, a second inverter circuit, a PFC circuit, a rectifier circuit and an anti-surge circuit which are electrically connected with each other; the anti-surge circuit comprises a patch current-limiting resistor, a patch voltage-dependent resistor, a bidirectional diode and a high-frequency filter capacitor, the first end of the high-frequency filter capacitor is connected with the first end of the voltage-dependent resistor and the patch current-limiting resistor, the second end of the patch current-limiting resistor is connected with the first end of the bidirectional diode and the rectifier circuit, and the second end of the high-frequency filter capacitor is connected with the second end of the voltage-dependent resistor, the second end of the bidirectional diode TVS and the rectifier circuit; the intelligent power module is internally designed with an anti-surge protection circuit, so that the product is prevented from being burnt due to the untimely protection of the peripheral mainboard, the reliability of the product is ensured, and the loss is reduced.

Provided are a reinforced aluminum alloy material, a preparation method therefor and a use thereof. The reinforced aluminum alloy material comprises an aluminum alloy matrix phase and an egg-structured cermet reinforcement phase dispersed in the matrix phase; on the basis of the total weight of the material, the content of the reinforcement phase is 0.2-0.5 wt%; the egg-structured cermet reinforcement phase comprises a ceramic oxide core layer, a cerium-aluminum alloy intermediate layer, and an oxide film layer of cerium-aluminum alloy metal in the intermediate layer. The reinforced aluminum alloy material has high strength at both room temperature and high temperature, and good extrusion molding performance, and is suitable for manufacturing of large / long-sized petroleum pipes.

The present application belongs to the technical field of coating preparation, and provides a high-wear-resistance and anti-fouling normal-temperature curing polysilazane coating, a preparation method and application thereof.The present application takes epoxy side group polysilazane resin as a film-forming main body, and the resin is obtained by reacting perhydropolysilazane with allyl glycidyl ether under the action of Karstedt catalyst;an amphoteric ion amphiphilic functional copolymer containing silicon anchoring is matched to form an anti-fouling interface on the surface of the coating film;latent amine curing agent is introduced, the latent amine curing agent is obtained by grafting branched polyethyleneimine with ketone imine closure and / or epoxy functional silane, so that the system can give consideration to construction pot life and normal-temperature crosslinking and curing;and a hybrid interpenetrating structure of organic crosslinking network and siloxane network is constructed in cooperation with a siloxane condensation crosslinking agent, the coating takes di-n-butyl ether as a solvent, adopts a quaternary ammonium salt catalytic system and can be separately packaged with a strong alkali to promote the reaction components, and the obtained coating is suitable for wear-resistance and anti-fouling protection of metals, ceramics and composite materials.

The application provides an alloy column nail inlaying and casting composite wear-resistant grinding disc and a preparation process thereof, and comprises the following steps: step one: uniformly mixing composite ceramic powder and iron-based alloy powder, granulating and preparing cermet particles, the adding amount of the composite ceramic powder is 65-80wt%, and the adding amount of the iron-based alloy powder is 20-35%; step two: pressing and forming the cermet particles and sintering to prepare alloy column nails; step three: fixing the alloy column nails with copper nails welded at the end to a wear-resistant grinding disc sand mold, and adopting a sand mold process to cast the composite alloy column nail inlaying and casting composite wear-resistant grinding disc. The ceramic particles are pretreated, so that the alumina powder can uniformly wrap the surface of the ceramic particles; through the joint action of the inorganic crosslinking agent and the binder, a strong crosslinking network is formed, the interface bonding force between the ceramic particles and the iron-based alloy particles is enhanced, and then the wear resistance, the strength and the impact resistance of the prepared grinding disc are improved.

This invention discloses a metal-ceramic composite gradient orthopedic implant material and its preparation process. This orthopedic implant material, obtained through gradient structure design, includes a specific intermediate layer thickness and interface structure: Ti matrix → Ti-Al-Si diffusion layer → Al alloy buffer layer → Al2O3 ceramic layer, effectively alleviating contact stress and preventing ceramic layer brittleness. The preparation process involves cladding a silicon-aluminum alloy onto the surface of a titanium alloy Ti-6Al-4V / TC4 using cold metal transfer (CMT) technology. After controlling the layer thickness through precision machining, a dense alumina ceramic layer is grown in situ using micro-arc oxidation (MAO). Finally, a mirror-finish composite gradient material is achieved through ultra-precision grinding. This preparation process solves the problems of easy peeling and poor wear resistance of existing coatings, addressing the clinical challenges of poor wear resistance, insufficient adhesion of ceramic coatings, and easy peeling in traditional titanium alloy implants. It constructs an integrated gradient structure with a "tough titanium alloy matrix – metallurgically bonded transition layer – high-hardness ceramic functional layer."

The present application relates to the field of new energy automobile power battery technology, and particularly relates to a stainless steel material for automobile battery shell and a preparation method thereof, comprising: a stainless steel substrate; and a composite functional layer integrally formed on one side of the substrate; wherein the composite functional layer has a three-dimensional porous metal framework, the pores of the three-dimensional porous metal framework are formed with a heat insulation reinforcing phase, the surface of the framework is attached with a catalytic active phase, and the surface and the pore inner wall of the layer are further loaded with an intumescent flame retardant phase. The present application integrates a high-performance thermoelectric composite material into a battery shell main body material, compounding an intumescent flame retardant system suitable for a metal / ceramic composite substrate, adopting a high-temperature co-sintering and low-temperature impregnation curing step-by-step process, realizing high-strength metallurgical / ceramic combination of the composite functional layer and the stainless steel substrate, and simultaneously optimizing a material system suitable for a harsh service environment, solving the technical problems of existing shell, such as fast heat conduction, single coating function, weak bonding force, high-temperature failure, and the like.

This invention belongs to the field of functional thin film materials technology, specifically relating to a titanium nitride-silver composite thin film material with low infrared emissivity, resistance to damp heat, and resistance to salt spray, and its preparation method. The thin film material is a nanocomposite thin film of titanium nitride and silver, wherein the TiN is a rhombohedral phase TiN with a preferred (015) orientation. 0.58 The grain size is 2.4 nm, and Ag is a cubic phase element with a preferred (002) orientation and a grain size of 2.0 nm; the atomic compositions of Ti, N, and Ag are 59.0%, 36.6%, and 4.4%, respectively, denoted as TiN. 0.62 -Ag 0.08 The thin film material exhibits an infrared emissivity of 0.10 in the 8–14 μm wavelength band, and its emissivity remains below 0.20 even after damp heat and salt spray tests, demonstrating excellent environmental resistance. This invention, through a metal-ceramic nanocomposite structure design, solves the problem of balancing low infrared emissivity and high durability inherent in traditional technologies. It can be widely applied to infrared stealth and surface protection for lightweight unmanned aerial vehicles, possessing significant practical value and strategic importance.

This invention discloses a wear-resistant treatment process for all-titanium alloy drill pipes, belonging to the field of surface treatment technology for oil drilling equipment. This process provides a differentiated synergistic protection scheme for different wear mechanisms in various parts of the titanium alloy drill pipe (inner wall, outer wall, and joints). The inner surface undergoes Ni-diamond-hBN nanocomposite electroplating and laser remelting sequentially to form a metallurgically bonded friction-reducing and wear-resistant layer; the outer wall undergoes micro-arc oxidation and supersonic flame spraying sequentially to construct a ceramic anchoring layer + metal-ceramic composite system; the joint uses gradient composition laser cladding to form a wear-resistant band, with localized additive reinforcement in its central area. This invention, through multi-technology integration and structural innovation, solves the technical bottlenecks of poor adhesion between a single coating and the titanium substrate, easy peeling, and mismatched wear resistance in different parts, significantly improving the overall wear life and reliability of all-titanium alloy drill pipes under harsh drilling conditions.

This invention relates to a cutting tool comprising a substrate (1) at least partially coated with a coating, the substrate (1) being made of cemented carbide or cermet, the coating comprising one or more layers, wherein at least one layer is a κ-Al2O3 layer (3) with a thickness of 3-6 μm, wherein the κ-Al2O3 layer (3) is composed of grains, and wherein the grain width is the width of the grains in a direction parallel to the surface of the substrate (1), and wherein the average grain width (d) of the κ-Al2O3 grains is... b The measurement is taken along a line corresponding to 80% of the thickness of the κ-Al2O3 layer (3), and the average grain width (d) of the κ-Al2O3 grains is... a The measurement is taken along a line 1 μm from the innermost κ-Al₂O₃ interface, characterized by the ratio d. b / d a Between 1.45 and 2.00.

This invention relates to the field of oil pipe and equipment materials, and discloses a reinforced aluminum alloy composite material, its preparation method and application, and a method for preparing an aluminum alloy drill pipe body. The composite material comprises an aluminum alloy matrix phase and an egg-shaped cerium-ceramic reinforcing phase dispersed in the matrix phase. The content of the reinforcing phase, based on the total weight of the composite material, is 0.2-0.5 wt%. The egg-shaped cerium-ceramic reinforcing phase includes a ceramic oxide core layer, a cerium-aluminum alloy intermediate layer, and a cerium-aluminum alloy metal oxide film layer in the intermediate layer. This reinforced aluminum alloy composite material exhibits high strength at both room temperature and high temperature, and good extrusion molding performance, making it particularly suitable for the preparation of large / long (10m long) oil pipes.

The utility model discloses a kind of coating equipment for high-hardness coating metal ceramic cutters, including abutment, the one side of the abutment is provided with coating assembly, the one side of the mounting seat is rotatably connected with worm wheel, the outer wall of the slide bar is fixedly connected with limit strip, one end of the slide bar is fixedly connected with plug block, the inside of one plug block is provided with blade tip slot, the inside of another plug block is provided with handle slot, the utility model relates to ceramic cutter processing technical field;The coating equipment for high-hardness coating metal ceramic cutters, first end of ceramic cutter is inserted into blade tip slot, then start cylinder, cylinder further promotes the slide bar to move forward and further inserts plug block to specified position, while the cylinder of other side also promotes another plug block to move and further inserts the handle end of ceramic cutter into handle slot, first numerical control spray gun and second numerical control spray gun can be started simultaneously to spray the two sides of cutter at this time.