107 results about "Ceramic metal" patented technology

The invention relates to the field of particle accelerators, in particular to an ultrahigh and extremely high vacuum acquisition system and method. The vacuum obtaining system comprises a vacuum obtaining device and a vacuum temperature control device, the vacuum obtaining device comprises a ceramic vacuum chamber, an interlayer vacuum chamber, a main pump chamber, a first vacuum pumping assembly and a second vacuum pumping assembly, the main vacuum chamber is formed in the ceramic vacuum chamber, and the ceramic vacuum chamber is arranged in the interlayer vacuum chamber; and an interlayer space is formed between the ceramic vacuum chamber and the interlayer vacuum chamber. The ceramic vacuum chamber is arranged in the interlayer vacuum chamber, the interlayer space is formed between the ceramic vacuum chamber and the interlayer vacuum chamber, and the interlayer vacuum chamber is heated through the heating element, so that the ceramic vacuum chamber is uniformly heated in a non-contact heat radiation uniform heating mode; the problem of thermal stress concentration caused by direct conduction heating of the ceramic vacuum chamber is thoroughly eliminated, leakage or fracture of the ceramic-metal joint caused by thermal stress is avoided, and the structural integrity of a heterogeneous material connecting area is ensured.

The invention relates to the technical field of material surface engineering and extreme working condition tribology, in particular to a wide-temperature-range composite lubricating component based on multi-scale design and interface self-adaption and a preparation method of the wide-temperature-range composite lubricating component based on multi-scale design and interface self-adaption. The composite lubricating structure comprises, from inside to outside, a metal bonding layer; the composition of the diffusion barrier layer is continuously and gradually changed from the alloy composition matched with the metal bonding layer to the ceramic composition; the self-lubricating functional layer comprises a ceramic metal composite matrix and a plurality of lubricant capsules dispersed in the ceramic metal composite matrix; the lubricant capsule comprises a ceramic shell layer and at least two lubricating phases with different temperature activation characteristics wrapped by the ceramic shell layer. According to the invention, continuous and effective lubrication in a wide temperature range is realized, the friction coefficient can be stabilized below 0.3, and the problems of reduction of the binding force between a coating and a matrix and early failure are solved.

This invention relates to a palladium-nickel-based brazing filler metal and a brazing method for high-temperature brazing of ceramic materials. The composition and content (mass percentage) of the palladium-nickel-based brazing filler metal are as follows: Nb: 8.0%–15.0%; Ti: 10.0%–18.0%; Zr: 5.0%–12.0%; Hf: 2.0%–6.0%; Ni: 20.0%–30.0%; Pd: balance, with a Pd to Ni ratio of 3:2. The method includes preparing raw materials according to the filler metal composition; then melting the raw materials into alloy ingots using an electric arc melting method under argon protection; preparing strip-shaped or powdered filler metal; placing the prepared filler metal between ceramic / ceramic or ceramic / metal materials and then brazing it at high temperature in a vacuum furnace. This invention can be used for high-temperature brazing of Si3N4 ceramics, SiC ceramics and their composites, and SiBCN system ceramics and their composites, with a joint temperature resistance of not less than 900℃.

The application relates to a kind of anti-14.5mm armor-piercing bullet function gradient armor structures, and the application relates to a kind of function gradient armor structures.The application is to solve the problems that the traditional ceramic / metal or ceramic / fiber composite armor structure has large area density and excessive thickness, and the anti-bullet performance is difficult to further improve.The armor structure includes a ceramic panel, a gradient B4C / Al composite material and a packaging material, and the overall structure presents a 100-50% gradient change in ceramic content from the panel to the back plate.The thickness of the ceramic panel in the armor structure is 14-18mm;The gradient B4C / Al is a multi-layer structure, and the overall thickness is 12-15mm;The packaging material includes a crack arrest layer, an adhesive and a fiber layer.The application is used in the field of armor protection.

This invention discloses a conductive paste for metallization of electronic ceramics, belonging to the field of electronic materials technology. The conductive paste for metallization of electronic ceramics of this invention includes copper alloy powder, glass powder, and an organic carrier. By controlling the ratio of copper, aluminum, and zinc in the copper alloy, the thermal expansion coefficient of the alloy is adjusted, making it compatible with electronic ceramic substrates such as alumina ceramics and zinc oxide varistors, achieving metallization through sintering under air conditions. The addition of tin improves the solderability of the metallized layer, meeting the process requirements of electronic components. The glass powder added in this invention has a low initial melting temperature, high bonding strength with the copper alloy, and strong adhesion to the ceramic substrate; combined with a specific ratio of organic carrier, it effectively improves the conductivity of the metallized layer after sintering.

Semiconductor components and systems having substrate contact surfaces with reduced hardness are provided. Systems and components include a ceramic, metallic, or non-metallic component for contacting a substrate. Systems and components include a layer of coating material on at least a portion of a substrate contact surface of the component. Systems and components include where the component for contacting a substrate includes a component Vickers hardness value, and the layer of coating material exhibits a coating Vickers hardness value. Systems and components include where the coating Vickers hardness value is more than or about 10% lower than the component Vickers hardness value.

The utility model provides a kind of micro pattern repair resistance device of ceramic metal film resistor, belong to micro-nano manufacturing technology field, including numerical control machine tool, support plate fixedly installed on the outer surface of numerical control machine tool, and ultraviolet laser is arranged to the outside of support plate;Self-locking mechanism, including the fixed frame fixedly connected to the outer surface of support plate, the connecting shaft fixedly installed in the inner surface of the fixed frame by bearing sleeve, the gear fixedly set in the outer end surface of the connecting shaft, the toothed plate engaged with the outer surface of the gear.The utility model can not only use the automatic gravity of ultraviolet laser to quickly install it by the cooperation between each component in self-locking mechanism, but also can automatically lock it after ultraviolet laser installation by locking assembly, so that ultraviolet laser can complete installation in a short time, and ensure that the laser after each replacement can be firmly locked.

The invention relates to the technical field of ceramic metal powder production, and provides a ceramic metal powder injection-compression molding, blanking and demoulding all-in-one machine which comprises a tray feeding device, a turnover device and a discharging device. The mold discharging device is used for feeding a mold into the overturning device, and the mold is internally provided with a product formed through injection molding of ceramic metal powder. The overturning device is used for locking the mold, arranging the tray above the mold, pressing the tray at a forming notch of the mold, enabling the tray and the mold to overturn at the same time, separating the mold from the tray up and down, enabling the product to fall off from the mold to the tray, overturning the mold again after the tray is pushed out, and unlocking the mold; the pushing device is used for pushing the tray to the discharging device from the overturning device, the tray bears the product, and then the mold is pushed to the mold returning device from the overturning device. The automatic turnover demolding machine has the advantages that the turnover device automatically receives the mold and the tray for turnover demolding, and the tray and the mold are automatically and separately conveyed out under the cooperation of the pushing device and the turnover device.

The application relates to a two-step brazing method for improving the joint strength of M42 steel and PCBN ceramic by using solid solution brazing, and belongs to the field of ceramic-metal brazing. The application aims to solve the problems of the existing M42 steel and PCBN ceramic brazing difficulty and low mechanical property. The method comprises the following steps: 1, ball milling mixing; 2, bonding the mixed powder after ball milling on the surface of the M42 steel; 3, heating to the mixed powder on the surface of the M42 steel to fully melt; 4, polishing, cleaning and drying; 5, placing Ti foil between the PCBN ceramic and the M42 steel which is pretreated and covered with a molten layer to obtain a to-be-welded piece; and 6, keeping the temperature at the connecting temperature. The application is used for the two-step brazing for improving the joint strength of M42 steel and PCBN ceramic by using solid solution brazing.

The application belongs to the technical field of ceramic matrix composite, and discloses a hypersonic aircraft hot end component and a preparation method and application thereof, and the method comprises the following steps: (1) printing a green body of the hypersonic aircraft hot end component to be prepared by taking ceramic-metal silicon-binder composite powder as raw materials; wherein the raw materials of the ceramic-metal silicon-binder composite powder comprise ceramic powder, metal silicon and organic binder; (2) after the green body is solidified, pressureless sintering is first carried out under the condition of nitrogen, then carbon precursor is infiltrated and reaction sintering is carried out, and then the hypersonic aircraft hot end component is obtained. By means of nitriding, uniformly distributed silicon nitride bonding phases and pyrolytic carbon are generated in the body, reaction sintering silicon infiltration converts the pyrolytic carbon into silicon carbide, the obtained material contains in-situ nitrided silicon nitride and secondary silicon carbide (beta-SiC) generated by reaction sintering silicon infiltration as bonding phases, and has more excellent mechanical properties.

This invention belongs to the field of high-content ceramic / metal composite material preparation technology, specifically relating to a high-fatigue-strength B4C / Al composite material and its preparation method. This invention employs chemical vapor deposition to generate CNTs in situ on the surface of micro / nano-scale B4C particles. These CNTs are then thoroughly mixed with aluminum alloy powder, and a billet is prepared using SPS plasma discharge sintering equipment. After grinding and polishing, the billet is processed using a high-frequency current rolling test bench to obtain a high-fatigue-strength B4C / Al composite material. This invention aims to improve the interfacial bonding quality of ceramic / metal composite materials and inhibit harmful reaction products through the modification effect of CNTs; the addition of high-frequency current-assisted rolling enhances the fatigue resistance of the composite material, resulting in a B4C / Al composite material with excellent comprehensive performance.

The invention discloses a high-strength ceramic metallization method and application thereof. The method comprises the following steps that metallized powder is provided, and the metallized powder is obtained by mixing and ball-milling the following powdery components including, by mass, 70%-75% of refractory metal, 6%-12% of Al2O3, 1%-5% of Mn, 6%-22% of SiO2 and 1%-7% of CaO; uniformly mixing the metallized powder with a binder to obtain metallized slurry; and printing the metalized slurry on the surface of an aluminum oxide ceramic substrate, drying, and sintering in a hydrogen furnace to form a metal layer with the thickness of 15-50 microns on the surface of the substrate. According to the technical scheme, the problems that an aluminum oxide ceramic energy transmission window is prone to sparking, breakdown and the like and the problems that a high-purity fine-grain aluminum oxide ceramic metalized layer is low in sealing strength, poor in compactness and the like are solved, and the obtained metalized aluminum oxide ceramic can be well applied to preparation of a high-power energy transmission window.

The invention relates to a ceramic-metal brazed joint with a nanocrystalline interface reaction layer and a preparation method and application of the ceramic-metal brazed joint, and belongs to the technical field of heterogeneous material connection. The invention discloses a ceramic-metal brazed joint with a nanocrystalline interface reaction layer. The ceramic-metal brazed joint comprises a ceramic matrix, a metal matrix, an active brazing filler metal layer and a nanocrystalline structure layer, wherein the active brazing filler metal layer is used for connecting the ceramic matrix and the metal matrix, and the nanocrystalline structure layer grows in situ between the active brazing filler metal layer and the ceramic matrix. According to the nanocrystalline reaction layer disclosed by the invention, the interface bonding strength and the thermal shock resistance of the joint are remarkably enhanced through a fine grain strengthening and toughening mechanism in combination with the structural isotropy of the nanocrystalline reaction layer, and the excellent sealing reliability of the joint in a severe environment is ensured; the method is suitable for aerospace thermal protection, high-power electronic device packaging and preparation of high-temperature and high-pressure sensor sealing components.

The invention relates to the technical field of ceramic / metal heterogeneous material connection, in particular to a method for low-temperature brazing of a porous SiC / TC4 connecting piece based on ultrasonic-assisted pre-dip plating. In order to solve the problems that in the prior art, a porous SiC ceramic structure is prone to damage, and the mechanical property of a connecting piece is low, the method comprises the two steps that firstly, low-temperature brazing filler metal is pre-dip-plated on the surface of porous SiC and TC4 alloy under ultrasonic assistance, the brazing filler metal is promoted to permeate into ceramic pores through the acoustic capillary effect, a bonding layer is formed, the ultrasonic effect is indirectly applied, and the bonding layer is formed; the ceramic matrix is prevented from being damaged; and then, the pre-dip-plated component is subjected to brazing connection at low temperature, and a compact and reliable connector is formed. According to the method, high-strength and low-damage connection of the porous ceramic and the titanium alloy at the low temperature is achieved, the process is simple and convenient, and the method is suitable for preparing complex structural parts in the fields of aerospace, chemical filtration and the like.

The invention provides a ceramic / metal multilayer brazing structure and a preparation method and application thereof, and relates to the technical field of electronic packaging. The ceramic / metal multilayer brazing structure comprises a ceramic substrate, a titanium layer, a diffusion barrier layer and a nano bonding layer from bottom to top, wherein the thickness of the diffusion barrier layer is 10-40nm. According to the ceramic / metal multi-layer brazing structure, the diffusion barrier layer is additionally arranged between the titanium layer and the nano bonding layer, Ti atoms can be effectively prevented from diffusing upwards to the Cu or Ag layer, generation of a brittle Ti-Cu reaction layer is inhibited, disintegration of the multi-layer structure and interface embrittlement can be effectively prevented, and the service life of the ceramic / metal multi-layer brazing structure is prolonged. Therefore, the integrity of the amorphous Ag / Cu multilayer structure is kept, the long-term reliability of the joint is improved, the interface structure of the joint is more uniform, the stress concentration is reduced, and the reliability under long-term thermal cycle and mechanical shock is remarkably improved.

This invention discloses an article comprising a substrate having a first portion comprising at least one of a metal or a ceramic metal oxide. A composite foam is bonded to the metal or ceramic metal oxide. The composite foam comprises: at least one polymer capable of being prepared by ring-opening metathesis polymerization; at least one catalyst for ring-opening metathesis polymerization; at least one bifunctional coupling agent represented by Z-X-Z. Each Z independently represents a group that chemically reacts with at least one of the chemically bonded surface hydroxyl groups to form at least one covalent bond. Each X independently represents a divalent organic linker group with a number average molecular weight of 500 g / mol to 10000 g / mol. And at least one of hollow glass microspheres or expanded polymer microspheres. This invention also discloses a method for preparing the article.

This invention relates to a method for preparing a carbon composite solder layer and a method for brazing ceramic-metal dissimilar materials using the same. The preparation of the carbon composite solder layer includes: constructing a carbon pattern; directly writing carbon of different shapes and forms on a solder sheet to obtain a patterned carbon composite solder preform; heating and drying the carbon composite solder preform; placing carbon composite solder layers of the same size between a ceramic and a metal sheet, then clamping and positioning them, and brazing them together in a vacuum brazing furnace. This invention uses directly written carbon composite solder, which can effectively reduce the residual stress of the ceramic-metal brazed joint and improve the toughness of the joint.

This invention discloses a rapid, high-strength microwave bonding method for ceramics and cemented carbide, belonging to the field of ceramic material bonding technology. The method includes the following steps: preparing a metal solder; grinding, polishing, and cleaning the bonding surfaces of the ceramic and cemented carbide respectively; loading the prepared metal solder into a mold and pressing it under uniaxial pressure to obtain a metal solder sheet; placing the ceramic, metal solder sheet, and cemented carbide in a stacked structure in a microwave sintering furnace for microwave sintering to achieve the bonding of the ceramic and cemented carbide. Compared with traditional brazing and diffusion welding, this ceramic-cemented carbide microwave bonding method increases the heating / cooling rate by 6-10 times, improves the single-furnace bonding efficiency by 5-9 times, allows for mass production, and yields ceramic-cemented carbide bonding interfaces with high strength. This invention significantly improves production efficiency, reduces energy consumption, and has widespread application value.

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.

The invention discloses a wear-resistant particle wear gradient ceramic-metal composite lining plate and a manufacturing process thereof. According to the ceramic-metal composite lining plate, the ceramic layer is arranged at the easy-to-wear part of the metal casting plate, so that the wear resistance can be enhanced, and the wear degree can be reduced. According to the preparation process of the ceramic-metal composite lining plate, the reserved space used for containing the ceramic particle powder slurry or the preset block is formed in the working easy-to-wear part of an evanescent mode foam model, the ceramic particle powder slurry or the preset block is filled, a ceramic layer is formed in the working easy-to-wear part of a casting part after pouring, the wear resistance is greatly improved, and the service life of the evanescent mode foam model is prolonged. The structural stability is obviously enhanced, and large equipment is not needed.

The application discloses a kind of bionic laminated ceramic-metal composite material and preparation method thereof, belong to material synthesis and processing technical field.Bionic laminated ceramic-metal composite material includes upper layer and lower layer of ceramic material, and intermediate layer of metal material, the intermediate layer is arch structure, the composite material is impregnated using epoxy resin impregnating agent;Ceramic material and metal material fixed connection.Preparation method includes: drawing three-dimensional model of ceramic layer structure and metal layer structure respectively;Print the three-dimensional model drawn using reduction photopolymerization and laser powder bed fusion 3D printer, obtain the shape of alumina green body and 316L stainless steel parts;Al2O3 green body is debound and sintered, and obtain the dense ceramic layer structure entity;Material is sequentially combined, and it is impregnated using epoxy resin impregnating agent.The application develops ceramic structure of high strength, high toughness and damage resistance.

The utility model discloses a carrier roller group of reducing wear, including carrier roller support and wear-resistant subassembly, carrier roller support is integrated structure, and the upper side of carrier roller support is equipped with the support vertical plate, the inner side of support vertical plate surface is equipped with the fixed shaft, wear-resistant subassembly is provided on the fixed shaft surface, and the wear-resistant subassembly is fixed on the fixed shaft surface. The wear-resisting assembly comprises a stainless steel inner roller, a high-hardness supporting roller, a heat dissipation silicone grease layer, an outer carrier roller, a ceramic metal coating and heat dissipation holes, the stainless steel inner roller is rotationally connected to the outer surface of the fixing shaft, the high-hardness supporting roller is arranged on the outer side of the stainless steel inner roller, and the high-hardness supporting roller and the stainless steel inner roller are of a tightly-connected integrated structure. According to the carrier roller set capable of reducing abrasion, the structure of the carrier roller set can be reinforced through the abrasion-resistant assembly, the inner and outer abrasion resistance of the roller body is improved, the inner and outer abrasion rate is effectively reduced, the height of the roller body can be flexibly adjusted through the adjusting assembly, and the needed height can be adjusted according to actual requirements.

The invention relates to the technical field of integrated circuit manufacturing, and discloses a multilayer composite ceramic metal packaging method for a high-temperature pressure sensor, and the method comprises the steps: executing atmosphere chemical potential pinning operation when the temperature of a sintering furnace enters a maximum shrinkage rate temperature region of a metalized functional layer; the dew point is increased to a pinning set value by adjusting the wet-hydrogen ratio of the process gas, so that the oxygen partial pressure is in a metastable state interval of oxidation-reduction reaction balance; according to the method, by introducing a chemical potential control dimension independent of a thermal field and utilizing a metastable state oxygen adsorption micromechanism, excessive shrinkage of the refractory metal in a specific temperature zone is inhibited in a targeted mode, and therefore the thermal field of the refractory metal can be effectively controlled. Transient shear stress generated by dynamic mismatch of a heterogeneous interface is eliminated, and the air tightness and the mechanical stability of the packaging structure under the high-temperature working condition are improved.

The invention provides an intelligent control method and system for a nano ceramic metal halide lamp and a storage medium, and the method comprises the steps: collecting the voltage and current of a lamp tube, the light intensity of three groups of preset characteristic spectral lines obtained by a multi-channel photoelectric sensor, and a real-time chromaticity coordinate collected by a chromaticity sensor; estimating two aging state quantities, namely the evaporation cumulant of the electrode and the light transmittance attenuation of the tube wall of the lamp tube on line; in the starting transition stage, the target ratio curve is adjusted, and the output power increasing slope of the lamp tube is adjusted; in the stable operation stage, an acoustic resonance judgment amplitude threshold is set according to the attenuation amount of the light transmittance of the tube wall, joint spectral analysis is carried out on the high-frequency ripple of the tube voltage and the light intensity fluctuation of a third preset characteristic spectral line, acoustic resonance is judged when an energy peak exceeding the threshold is detected at the same frequency point, and a sweep frequency perturbation signal is superposed to a square wave fundamental frequency; and meanwhile, a mapping function is matched, real-time and target chromaticity coordinate deviation is substituted, a driving current asymmetry degree adjusting quantity is output to compensate color drift, and updating of the adjusting quantity is suspended during acoustic resonance.

The application is realized by the technical scheme as follows: a ceramic metal packaging shell, comprising an alumina ceramic shell, the alumina ceramic shell is provided with a frame type structure, and a convex strip is formed on the inner wall of the alumina ceramic shell; a tungsten copper bottom plate, the tungsten copper bottom plate is provided with a stepped table structure, the upper half of the tungsten copper bottom plate is a core area cavity, and the lower half is a heat sink cavity, the tungsten copper bottom plate is welded on the alumina ceramic shell, and the core area cavity corresponds to the convex strip part on the inner side of the alumina ceramic shell; and a Kovar alloy cover plate, the Kovar alloy cover plate is welded on the alumina ceramic shell. The application has the advantages that the ceramic has good air tightness, can resist the influence of extreme environments such as high temperature, high humidity, corrosion and radiation on electronic devices after packaging, the ceramic has a matching thermal expansion coefficient with metal, and has good mechanical properties, and almost no damage is caused after thermal shock test and temperature cycle test.

The invention belongs to the technical field of ceramic-metal composite materials, and particularly relates to a gradient hardness composite ceramic swinging hammer and a preparation method thereof.The preparation method comprises the following steps that S1, ceramic particles are pretreated; s2, fully mixing the three ceramic particles with a reaction type metal binder, a pore forming agent and an inorganic binder according to a specific ratio, filling a mold with taper holes in a layered manner according to a fine-medium-coarse sequence, carrying out compression molding, drying, and carrying out two-stage sintering to obtain a ceramic preform; s3, preheating a prefabricated body; s4, the smelted high-toughness alloy steel liquid is poured into a casting mold, and pressure-assisted casting infiltration is carried out; s5, after the casting is cooled, shakeout and cleaning are conducted, and heat treatment is conducted; and S6, necessary machining is carried out. A gradient composite layer with continuously decreasing hardness is formed on the end face of the hammer head of the prepared swinging hammer from outside to inside, interface stress concentration is effectively relieved, impact resistance and wear resistance are improved, and metallurgical bonding of ceramic and metal is achieved.

The present application belongs to the field of catalytic separation engineering, and particularly relates to a metal ceramic dual-phase hydrogen-permeable membrane, a preparation method thereof and a reactor for ammonia decomposition coupled with carbon dioxide reduction. The metal ceramic dual-phase hydrogen-permeable membrane is prepared by using ceramic LWO and metal Ni powder as raw materials, and ethanol as a solvent. After the raw materials and the solvent are mixed, ball milled, dried, a small amount of powder is taken and pressed into a sheet in a mold, and then sintered under Ar atmosphere, a dense Ni-LWO membrane is obtained. Finally, a Ni-CeO2 catalyst is coated on the surface of the Ni-LWO membrane to obtain the metal ceramic dual-phase hydrogen-permeable membrane. The membrane has high hydrogen permeation rate, high mechanical strength, high CO x resistance, strong performance, and can be applied to high-temperature environment, and has good thermal and chemical stability and CO x resistance and other advantages. The present application also provides a membrane preparation method, which is simple in preparation process and low in cost. Meanwhile, the hydrogen-permeable membrane can be used to construct an ammonia decomposition coupled with CO2 reduction membrane reactor.

The invention discloses a heat-resistant cushion block and a preparation method thereof, and belongs to the technical field of ferrous metallurgy. The composite material is prepared by mixing metal powder, ceramic powder and an adhesive, drying and debonding, semi-solid forming and high-temperature sintering. Through a metal-ceramic composite formula, the prepared cushion block can achieve the excellent performance of oxidation resistance and compressive deformation resistance at the high temperature of 1300 DEG C and can stably adapt to the high-temperature working condition of 1300 DEG C or above of a large stepping type steel rolling heating furnace, the service life of the cushion block is prolonged by 2-3 times, the shutdown maintenance frequency of the heating furnace and the cushion block replacement cost are greatly reduced, and the service life of the cushion block is prolonged by 2-3 times. And through stepped baking debonding, precise-temperature-control semi-solid forming and vacuum sintering, the problems that the high-chromium alloy is poor in flowability, deslagging is difficult, and ceramic-metal mixing is uneven can be effectively solved, the porosity of a finished product is smaller than or equal to 1.5%, and the process stability is high.

The application relates to the field of ceramic metal composite material preparation, and provides an in-situ monitoring method and device for variable-speed infiltration of ceramic / metal bi-continuous gradient composite materials, which comprises the following steps: pretreating a porous ceramic preform, pre-infiltrating metal, and preparing a infiltration mold; calibrating a reference signal of an X-ray imaging system; loading the porous ceramic preform and casting a metal melt; matching the rotation speed of the mold with the loading rate through gradient variable-speed loading; collecting an X-ray two-dimensional projection sequence; and performing three-dimensional dynamic image reconstruction and analysis; the application can capture the dynamic change of the metal melt during infiltration in real time, the infiltration process parameters can be accurately optimized through analysis and monitoring of the data, internal defects of the composite material can be reduced, the product quality and production efficiency are improved, and the development of the ceramic metal composite material preparation technology is promoted.

This utility model discloses a special ceramic metallization printing fixture, belonging to the field of special ceramic processing technology. The fixture includes a positioning frame and a mounting plate detachably installed within the positioning frame. It also includes: mounting holes arranged in a rectangular array on the mounting plate for placing ceramic substrates; each mounting hole has a clamping part for limiting the ceramic substrate's position. When the ceramic substrate is located within the mounting hole, its surface is flush with the mounting hole. Through the arrangement of the mounting plate and mounting holes, when the ceramic substrate is placed into the mounting hole, it directly contacts the anti-slip texture on the anti-slip pad, and the elasticity of the elastic sheet compresses the sidewall of the ceramic substrate, thereby limiting its position. This fixture can adapt to ceramic substrates of different sizes of the same type, effectively improving the adaptability of the mounting plate to the ceramic substrate and further improving production efficiency.