226 results about "Ceramic metal" patented technology

The invention discloses a ceramic-metal composite structure with a low thermal expansion coefficient and a middle layer for assisting two-step temperature control brazing and a preparation method of the ceramic-metal composite structure. The composite structure is formed by metallurgical bonding of a ceramic matrix, a titanium-containing active brazing filler metal layer, a low-thermal-expansion-coefficient (2 * 10 <-6 > / K-9 * 10 <-6 > / K) middle layer, a low-temperature brazing filler metal layer and metal base metal in sequence. During preparation, a step-by-step temperature control brazing process is adopted, wherein in the first step, ceramic / intermediate layer connection is achieved through titaniferous active brazing filler metal with the solidus larger than or equal to 780 DEG C under the vacuum condition smaller than or equal to 5 * 10 <-3 > Pa; and secondly, under the vacuum or inert atmosphere, brazing filler metal with the solidus being smaller than or equal to 650 DEG C is adopted for completing connection of the middle layer and the metal base metal. The low-stress and high-strength ceramic-metal composite structure is successfully constructed on the basis of the thermal matching design of the low-thermal-expansion-coefficient middle layer and the ceramic and the stress gradient release mechanism of the two-step temperature control brazing process in a cooperative coupling mode, and the low-stress and high-strength ceramic-metal composite structure is particularly suitable for the high-temperature and high-reliability fields of aerospace thermal protection systems, high-power electronic device packaging and the like.

The invention belongs to the technical field of post-treatment of ceramic / metal composite materials, and particularly relates to a high-content ceramic / metal composite material and a preparation method thereof. In order to reduce the existence of micro gaps on the surface of the ceramic / metal composite material and improve the performance of the ceramic / metal composite material, a high-content ceramic / metal composite material blank is prepared by adopting a spark plasma sintering method, and then high-frequency pulse current is added to assist rolling; and finally, the high-content ceramic / metal composite material with micro-gap healing and improved performance is obtained.

The invention relates to the technical field of metal electrodes, and discloses a metal electrode, a preparation method and an optoelectronic device. The invention discloses a preparation method of a metal electrode. The preparation method comprises the following steps: S1, preparing a mask layer on a substrate of which the surface is covered with a transparent conductive film; s2, performing laser grooving on the surface of the mask layer to expose the metal seed layer; s3, a metal conducting layer is prepared on the metal seed layer through electroplating, and a metal electrode is obtained; wherein the substrate is selected from one of glass, a flexible material, ceramic, metal, a wafer and mica. The preparation method of the metal electrode provided by the invention is short in process, simple to operate, wide in mask layer selection range, strong in electrode adhesion, high in electrode processing precision, high in designability, simple in electroplating mode, strong in electroplating liquid adaptability, low in cost and high in production efficiency, and the corrosion resistance of the transparent conductive film can be improved.

The invention provides a Cr12MoV cold work die steel repairing method based on a laser cladding technology and application of the Cr12MoV cold work die steel repairing method. Ultrasonic-assisted laser cladding is adopted, and a Ni60 / WC ceramic metal composite coating is formed; the mixed powder material for laser cladding comprises the following components in percentage by weight: 10 to 25 percent of WC ceramic powder, 0.2 to 1 percent of Zr powder, 0.2 to 1 percent of La2O3 rare earth powder and the balance of Ni60 alloy powder. According to the Cr12MoV cold work die steel repairing method based on the laser cladding technology and the application, the ultrasonic-assisted laser cladding technology is adopted, a cladding coating which is few or free of pore cracks, compact in structure and small in grain size is obtained, the compactness and uniformity of the coating are improved, the quality of the coating can be effectively improved while the operation technology is simplified, and the service life of the coating is prolonged. And the microstructure and the macroscopic performance of the coating are optimized, and the coating can be suitable for repairing the surface of the Cr12MoV cold roller.

The invention discloses a method for metallizing ceramic by using whisker pinning, and relates to a method for metallizing ceramic. The technical problems that an existing ceramic metallization process is complex, the application range is small, and cost is high are solved. According to the method, boric acid is adopted to heat the surface of the ceramic containing the Al element, the aluminum borate crystal whiskers in the micro-nano size level can grow, and the crystal whiskers are high in high-temperature strength; then the ceramic with the whisker structure and the metal are subjected to hot pressing at a high temperature, the metal material is softened at a high temperature along with temperature rise, the whiskers can be pressed into the metal, a microcosmic pinning structure is formed, connection between the ceramic and the metal is achieved, and metallized ceramic is obtained; and then in the cooling process, the metal is cooled and shrunk, stress is formed on the crystal whiskers, and the binding force of the ceramic and the metal is improved. According to the method, ceramic metallization is achieved through whisker pinning, operation is simple and effective, and the obtained metallization layer is excellent in performance, good in mechanical stability and wide in application range and has good application prospects.

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 discloses a brazing method for an in-situ synthesis titanium-rich phase reinforced ceramic / metal joint. According to the method, the controllable in-situ reaction is realized in the ceramic-metal joint by designing the multi-element alloy brazing filler metal containing the Ti active element and matching with the gradient temperature control brazing process. The method specifically comprises the following steps: preparing multi-element alloy foil brazing filler metal containing 0.1-10wt.% of Ti; carrying out surface pretreatment on the connection surface; vacuum brazing is carried out by adopting two-section type heating and three-section type controlled cooling; and a titanium-rich reinforcement phase of 0.1-5 microns is generated in situ in the welding seam through a Ti element diffusion reaction. The method effectively solves the key technical problems that the mechanical strength of a ceramic / metal heterogeneous joint is reduced due to insufficient weld joint strength and concentrated accumulation of residual stress of the joint, and the like, and is particularly suitable for reliable connection requirements of precise components in the fields of aerospace, energy equipment and the like.

The invention discloses a gradient functional material BJ printing device and method based on array nozzles. Comprising a printing base plate which is vertically and movably arranged, three independent powder feeding spray heads, a binder spray head, a binder storage tank, a spray head fixing disc, a high-speed camera used for synchronously capturing the bonding condition of a binder and powder, a horizontal sliding rail, a water balance beam and a leveling roller used for leveling the set powder. Wherein the three powder feeding spray heads and the binder spray head are fixedly arranged on a spray head fixing disc which is horizontally and movably arranged, and the high-speed camera is arranged on the lower surface of the spray head fixing disc and right faces a printing substrate. Ceramic / ceramic, ceramic / metal, metal / metal and other gradient functional materials are prepared through array multi-nozzle coaxial powder feeding and binder spraying by adopting a binder spraying-powder conveying method.

The invention provides a surface metallization method of a low-dielectric porous silicon nitride ceramic material, and belongs to the field of ceramic metallization. The method comprises the steps of porous silicon nitride ceramic material preparation, hole sealing treatment and metallization. The hole sealing treatment comprises the following steps: heating aluminum sol to 36-40 DEG C, then spraying the aluminum sol on the surface of the porous silicon nitride ceramic material, drying, and preserving heat at 556-565 DEG C for 1.2-1.4 hours to obtain hole-sealed silicon nitride ceramic; by adopting the method disclosed by the invention, a firm and uniform metallization layer can be formed on the surface of the porous silicon nitride ceramic, and the high-temperature resistance is good.

The invention relates to a method for manufacturing the surface of a timepiece component, in particular an external timepiece component, characterized in that it comprises the following steps: obtaining a timepiece component blank forming the core of the timepiece component; -depositing on said core a surface coating made of a ceramic-metal composite to form a hard surface of the timepiece component, said hard surface having a hardness greater than or equal to 500 HV, or even greater than or equal to 600 HV, or even greater than or equal to 750 HV, or even greater than or equal to 900 HV.

The utility model discloses a ceramic metallization tensile strength detection device which comprises a workbench, a power box is fixedly arranged at one end of the top surface of the workbench, a fixed plate is fixedly connected with one end, far away from the power box, of the top surface of the workbench, and a movable plate is arranged between the power box and the fixed plate on the top surface of the workbench in a sliding mode. Clamp heads are fixedly connected to the opposite side faces of the fixed plate and the movable plate, wedge-shaped grooves are formed in the opposite side faces of the two clamp heads respectively, wedge-shaped clamping blocks are arranged on the inclined side walls in the wedge-shaped grooves in a relatively sliding mode, and the clamping faces of the two clamping blocks are arranged in parallel. According to the tensile strength detection device for ceramic metallization, the clamping surfaces of the clamping blocks are kept parallel in the moving process, so that the clamping surfaces are in uniform contact with the surface of a ceramic substrate, stress concentration cannot be generated, the ceramic substrate can be firmly clamped, falling off during tensile strength detection can be prevented, and meanwhile, stripping or falling off of a metal layer can be prevented.

The invention relates to the technical field of material sintering equipment, and discloses an intelligent temperature and pressure control sintering furnace with vacuum and positive pressure sintering functions, which comprises a shell, a control mechanism is arranged outside the shell and is used for controlling the whole device in real time, and a vacuumizing mechanism is arranged on one side in the shell and is used for vacuumizing the shell. The vacuumizing mechanism further comprises an upper heating assembly, a lower heating assembly, a pressing and sealing assembly and a pressure weighing assembly, the upper heating assembly is used for upper heating treatment, the lower heating assembly is used for lower heating treatment, the pressing and sealing assembly is used for pressing and sealing treatment, and the pressure weighing assembly is used for conducting weighing detection on pressure. A pressure detection mechanism is arranged on the other side in the machine shell. Through the collaborative design of the composite vacuum system and the pressure control module and through the sintering process requirements of covering multiple types of materials such as precision ceramics and metal composite materials, the process compatibility and stability are remarkably improved.

The application relates to a method for preparing a porous structure Al2O3 / Al ceramic metal coating on the surface of an aluminum-based composite material, and belongs to the technical field of surface treatment of aluminum-based composite materials. The application aims to solve the problems of the prior art, such as complicated preparation of ceramic-metal composite materials, uncontrollability, high cost, difficulty in balancing the strength and toughness of the composite material, and insufficient regulation of the thermal conductivity. The method comprises the following steps: I, pretreating the surface of the aluminum-based composite material; II, preparing a porous micro-arc oxidation coating; and III, preparing an Al2O3 / Al ceramic coating with a complete structure. The multilayer structure composite material prepared by the application has more excellent mechanical properties (high resistance to friction and wear, high thermal shock resistance, adjustable thermal expansion coefficient, high fracture toughness) and high thermal conductivity (>=100 W / mK), and has important significance for the upgrading of future packaging substrate materials and the development of composite materials for harsh deep-sea, deep-space and deep-earth environments.

The invention belongs to the technical field of filling production and preparation, and particularly relates to a ceramic metal connecting anti-skid piece which comprises a metering rod, the end of the metering rod is sleeved with a connecting sleeve, a key groove is formed in the outer side wall, close to the connecting sleeve, of the metering rod, a connecting key is installed in the key groove, and the connecting key and the connecting sleeve are made of the same material. A clamping assembly is arranged on the side wall of the connecting key, an adsorption assembly is arranged in the middle of the key groove, the metering rod, the connecting sleeve, the key groove, the connecting key, the clamping assembly and the fixing assembly are arranged in the step, a ceramic metal connecting anti-skid structure is formed, and the function that the metering rod and the connecting sleeve are always in close fit when the device is subjected to cold and hot deformation is achieved; the problem that the metering rod and the connecting sleeve fall off due to inconsistent cold and hot deformation of the metering rod and the connecting sleeve is solved, the stability of the device during connection is improved, and the situation that the metal fatigue of the connecting sleeve occurs due to inconsistent cold and hot deformation of the metering rod and the connecting sleeve is reduced.

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.

The application belongs to the field of welding, and discloses a preparation method of ceramic / metal composite material. The ceramic is quickly metallized by laser scanning marking on the ceramic surface, and the metallized ceramic and copper are sintered by hot isostatic pressing to prepare the ceramic / metal composite material. The problems of poor wettability of the ceramic and the metal and high preparation cost are solved, the cost is reduced by laser metal foil pretreatment on the ceramic surface, the processing time is short, the process temperature is low, and the operation is safer. In the preferred embodiment of the application, there is a transition layer with a thickness of about 6 microns, and the existence of the transition layer can well increase the bonding force of the composite material, and the peeling strength can reach 9.94 N / mm.

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.

A composite grinding ball has a core-shell structure. The shell has a ceramic reinforcement including a three-dimensionally interconnected network of periodically alternating ceramic metal composite granules with interstices having an average size within the millimetric range. The ceramic metal composite granules have at least 40 vol % of ceramic particles cemented in a binder metal matrix, the ceramic particles having average sizes within the micrometric range. The three-dimensionally interconnected network is embedded in a ferrous alloy cast metal matrix that fills the interstices between the interconnected ceramic metal composite granules. The embedded ceramic metal composite granules have a volume fraction of porosity of less than 5 vol %. The shell has a volume content of ceramic metal composite granules of at least 35 vol %, and the ceramic reinforcement covers at least 85% of the total surface of the grinding ball.

The invention belongs to the technical field of ceramic metal composite materials, and particularly relates to a multiphase ceramic composite plate and a preparation method thereof, and a metal-based ceramic composite lining plate for a ball mill and a preparation method thereof. The composite material comprises the following components in parts by weight: 70-90 parts of zirconium oxide, 5-10 parts of silicon carbide, 5-10 parts of aluminum oxide, 2-6 parts of titanium dioxide, 2-5 parts of tungsten carbide, 2-4 parts of scandium oxide, 2-4 parts of cobalt oxide, 1-3 parts of potassium tantalate, 1-3 parts of potassium titanate, 1-2 parts of bismuth trioxide and 1-2 parts of erbium oxide. A compact ceramic plate is obtained through mixing, wet grinding, drying, pressing and high-temperature sintering, and the special-shaped ceramic sheet is formed through further crushing and screening. The special-shaped sheet is laid in a mold and filled with high-chromium cast iron powder, and the integrated metal-based ceramic composite lining plate with a stable structure is formed through compaction and high-temperature sintering. The prepared lining plate has the high hardness of ceramic and the toughness of metal, and is suitable for high-abrasion equipment such as a ball mill.

The invention discloses a plating material for surface metallization of a ceramic material, the ceramic material and a preparation method of the ceramic material. The plating material for metallizing the surface of the ceramic material comprises a metal alloy and a mixed salt in a weight ratio of 1: (1-10), wherein the metal alloy comprises, by weight, 10%-99% of active metal elements, 0%-85% of iron elements and 1%-5% of other elements, and the active metal elements comprise one or more of transition metal of titanium, molybdenum, vanadium, niobium, tungsten or rare earth neodymium; the mixed salt comprises two or three of alkali metal salt, alkaline earth metal salt and villiaumite; the plating material for metallization of the surface of the ceramic material is used for forming a metal layer on the surface of ceramic by utilizing ionization deposition of high-temperature molten salt on metal alloy. The plating material for ceramic material surface metallization can be used for plating micron-scale transition metal layers such as titanium, molybdenum, vanadium, niobium, tungsten, rare earth neodymium and the like on the ceramic surface, the aim of low-cost metallization of the ceramic surface is achieved, and the wettability and interface bonding strength of ceramic metal are improved.

A computer-controlled machine tool (1) for the production of small workpieces, particularly in the dental field, preferably from ceramic materials, metals, plastics, or waxes, is described. The machine tool is designed with a tool spindle (2) for holding various tools (3), with a tool motor (4) for driving the tool spindle (2), and with a workpiece holding device (5) for receiving and holding a workpiece (6) to be machined, wherein the workpiece holding device (5) can be positioned relative to the rotating tool (3) in or about three to five or more machining axes, with a frame element on which the tool motor (4) and the workpiece holding device (5) are mounted by means of linear guides, characterized in that the frame element is designed as a plane-parallel base plate (8) and two linear guides are arranged on the base plate (8) at an intersecting angle.wherein a tool spindle axis (2A) of the tool motor (4) is arranged at a wider angle to the other linear axes of the linear guides such that, by coordinated movements of the three linear axes, all points in space, at least within the intended workpiece (6), can be reached with the tool clamped in the tool spindle (2).