1519 results about "Cermet" patented technology

The invention relates to a tool, especially a cutting insert for cutting metallic materials, which consist of a hard metal, cermet ceramics or steel base, especially of a high speed steel base, and at least one layer deposited thereon. The single layer, or in the case of several layers the outer layer or the layer underneath the outer layer, contains molybdenum sulfide. The aim of the invention is to improve the resistance to wear of the friction-reducing, molybdenum sulfide containing layer even at high pressures. To this end, the molybdenum sulfide containing layer consists of an alternating sequence of two layer that are different from one another. The first layer contains 51 to 100% by weight of metallic molybdenum and the second layer contains 21 to 100% by weight of MoS2 which substantially consists of hexagonal crystals that are at least substantially oriented in a plane parallel to the tool surface.

Particles have an ultrathin, conformal coating are made using atomic layer deposition methods. The base particles include ceramic and metallic materials. The coatings can also be ceramic or metal materials that can be deposited in a binary reaction sequence. The coated particles are useful as fillers for electronic packaging applications, for making ceramic or cermet parts, as supported catalysts, as well as other applications.

A ceramic-metal composite articulation is provided with substantial elimination of wear debris, wherein a ceramic material is provided with superior mechanical properties tailored for articulating with ceramic articulations having high flexural strength (greater than about 700 MPa), high fracture toughness (greater than about 7 MPa^1/2) and a high Weibull modulus (greater than about 20), in comparison with presently available bio-ceramics such as alumina or zirconia. The mechanical property enhancement enables ceramic materials with greater reliability and significantly reduced in-vivo fracture risk to be obtained. Preliminary in-vitro wear performance, to several million cycles using established test protocols, of head/cup components in a prosthetic hip joint made from these ceramics also demonstrates the ultra low wear characteristics. These material properties substantially eliminate polyethylene (PE) wear debris mediated implant failures by offering an optimal combination of bio-mechanical safety and reliability with ultra low wear performance.

A low friction top coat over a multilayer metal/ceramic bondcoat provides a conductive substrate, such as a rotary tool, with wear resistance and corrosion resistance. The top coat further provides low friction and anti-stickiness as well as high compressive stress. The high compressive stress provided by the top coat protects against degradation of the tool due to abrasion and torsional and cyclic fatigue. Substrate temperature is strictly controlled during the coating process to preserve the bulk properties of the substrate and the coating. The described coating process is particularly useful when applied to shape memory alloys.

In a total knee replacement (TKR), the use of a cushion element provides better wear characteristics than polyethylene (“poly”) alone. Since a metal-on-metal, metal-on-ceramic, or ceramic-on-ceramic articulating surface has better wear characteristics than metal on poly, the invention essentially provides cushioning for metal/ceramic-on-metal/ceramic joint replacements. It also allows the use of elastomers for their cushioning properties rather than their surface wear and tensile strength characteristics. The contained compressible elements could also be used as a cushion below polyethylene components, polyethylene over metal components, unicondylar knee replacements, patellar components, and prosthetic components for other parts of the body, including the hip, elbow, shoulder, wrist, and ankle.

A device having an improved thermal barrier coating (46) and a process for manufacturing the same. A support structure (28) for retaining a ceramic insulating material (46) on a substrate (16) is formed by the deposition of a support structure material through a patterned masking material (14). The support structure can define cells into which the ceramic insulating material is deposited following removal of the masking material. The masking material may be patterned by known photolithographic techniques (22,24) or by laser etching (48). The support structure (28) may be a composite metal-ceramic material having either discreet layers (30,34) or a graded composition and may be deposited by an electro-desposition process followed by a heat treatment to form a solid state diffusion bond with the substrate. The ceramic filler material may be deposited (44) by the electrophoretic deposition of ceramic particles coated with a bonding material that is subsequently heated to oxidize and to bond the particles together. The support structure may be provided with included walls in order to improve its resistance to foreign object impact damage.

A solid oxide fuel cell (SOFC) includes a cathode electrode, a solid oxide electrolyte, and an anode electrode having a first portion and a second portion, such that the first portion is located between the electrolyte and the second portion. The anode electrode comprises a cermet comprising a nickel containing phase and a ceramic phase. The first portion of the anode electrode contains a lower porosity and a lower ratio of the nickel containing phase to the ceramic phase than the second portion of the anode electrode.

Provided are coated sleeved oil and gas well production devices and methods of making and using such coated sleeved devices. In one form, the coated sleeved oil and gas well production device includes an oil and gas well production device including one or more bodies and one or more sleeves proximal to the outer or inner surface of the one or more bodies, and a coating on at least a portion of the inner sleeve surface, outer sleeve surface, or a combination thereof, wherein the coating is chosen from an amorphous alloy, a heat-treated electroless or electro plated based nickel-phosphorous composite with a phosphorous content greater than 12 wt %, graphite, MoS₂, WS₂, a fullerene based composite, a boride based cermet, a quasicrystalline material, a diamond based material, diamond-like-carbon (DLC), boron nitride, and combinations thereof. The coated sleeved oil and gas well production devices may provide for reduced friction, wear, erosion, corrosion, and deposits for well construction, completion and production of oil and gas.

An interconnect and gas separator for a solid oxide fuel cell includes a cermet material comprising a first conductive phase and a second ceramic phase or a multi-component ceramic material including a first ceramic ionically conductive and electrically non-conductive component and a second ceramic electrically conductive component.

A hot gas filtration apparatus includes a vessel, a plurality of filter elements mounted within the vessel and positioned such that hot gas flows through said filter elements, with each of said filter elements having a porous body, and a catalytic layer on surfaces of the porous body. The porous body of the filter element may include one of: a porous ceramic monolithic matrix, a continuous fiber reinforced ceramic composite (CFCC) matrix, a metallic matrix, an intermetallic matrix, a superalloy, and a metal-ceramic composite matrix. When the porous body is a nonoxide ceramic, a metallic matrix, an intermetallic matrix, a superalloy, or a metal-ceramic composite matrix, the invention further includes an oxidative resistant layer coating surfaces within the porous body, and the catalytic layer is on the oxidative resistant layer. A porous particulate removal membrane can be positioned on one or more surfaces of the filter element. The porous membrane can also provide a surface for one or more catalysts. The catalysts on the porous surface of the membrane(s) can be the same as or different from the catalysts on surfaces within the porous body.

Composite hydrogen transport membranes, which are used for extraction of hydrogen from gas mixtures are provided. Methods are described for supporting metals and metal alloys which have high hydrogen permeability, but which are either too thin to be self supporting, too weak to resist differential pressures across the membrane, or which become embrittled by hydrogen. Support materials are chosen to be lattice matched to the metals and metal alloys. Preferred metals with high permeability for hydrogen include vanadium, niobium, tantalum, zirconium, palladium, and alloys thereof. Hydrogen-permeable membranes include those in which the pores of a porous support matrix are blocked by hydrogen-permeable metals and metal alloys, those in which the pores of a porous metal matrix are blocked with materials which make the membrane impervious to gases other than hydrogen, and cermets fabricated by sintering powders of metals with powders of lattice-matched ceramic.

The invention is directed to a fuel cell which is configured to avoid deformation caused by differential shrinking, and which mitigates the damage caused by the introduction of an oxidizing environment in the anode cavity during the operation of the fuel cell. The fuel cell has a cathode, an electrolyte, an anode and a porous multifunctional layer disposed on the anode opposite to the electrolyte. The porous multifunctional layer comprises a cermet which has thermal expansion and shrinkage behaviour substantially similar to the other fuel cell layers.

The invention belongs to the field of diamond wheels and particularly relates to a metal ceramic combination binding agent and a combination binding agent diamond wheel. The metal ceramic combination binding agent is composed of, by weight, 60%-80% of 663 bronze powder and 20%-40% of ceramic powder. The ceramic powder is homemade and composed of, by weight, 45%-60% of silicon dioxide, 20%-30% of boric oxide, 10%-15% of potassium oxide, 5%-10% of magnesium oxide and 2%-5% of calcium oxide. The combination binding agent diamond wheel is composed of, by volume, 25%-40%of diamond abrasive, 55%-75% of combination binding agent and 2%-3% of pore forming agent. When the diamond wheel made of the metal ceramic combination binding agent is applied to a five-axis cnc machine tool, the good sharpness and the good self-sharpening performance of a ceramic binding agent are kept and the advantages of high rigidity and the good shape-maintaining performance of a metal binding agene are obtained. The comprehensive processing efficiency is improved by 100% to 150%.

Particles have an ultrathin, conformal coating are made using atomic layer deposition methods. The base particles include ceramic and metallic materials. The coatings can also be ceramic or metal materials that can be deposited in a binary reaction sequence. The coated particles are useful as fillers for electronic packaging applications, for making ceramic or cermet parts, as supported catalysts, as well as other applications.

The invention discloses a laser near-net shaping method for a metal-ceramic multi-dimensional functionally-graded structural component. According to the laser near-net shaping method for the metal-ceramic multi-dimensional functionally-graded structural component, a laser fast shaping system is used for combining metal powder and ceramic powder, which are used as raw materials and have changeable proportioning rates, to form the multi-dimensional functionally-graded structural component directly. The laser near-net shaping method specifically includes the following steps: firstly, two types or more than two types of metal powder and ceramic powder are dried and respectively placed in different powder barrels of a powder feeding device; secondly, inert gas is used as powder feeding and protecting gas; and lastly, a numerical control program is used for controlling the moving trajectory and the moving speed of a laser machining head and the real-time powder feeding amount of each powder barrel of the powder feeding device, the change of gradients can be realized in a horizontal plane and a vertical plane of a base plate, and therefore the complex multi-dimensional gradient change in the overall space can be realized. On one hand, the laser near-net shaping method for the metal-ceramic multi-dimensional functionally-graded structural component is a direct shaping method, and on the other hand, the laser near-net shaping method is suitable for melting solidification shaping of various high-melting-point materials, and the selection range of the design of functionally-graded materials is expanded.

The invention discloses a laser-induction hybrid melting direct forming method and device. The laser-induction hybrid melting direct forming method comprises the following steps of: generating a three-dimensional model of a part through CAD (Computer-Aided Design) software, and then slicing the three-dimensional model and generating a G code to drive a numerical control system and a base body to move; and melting synchronously fed metal or metal/ceramic hybrid powder through a high-power laser beam and an induction heat source, and depositing the three-dimensional part in a designed shape layer by layer, wherein a temperature controller is used for monitoring and controlling the temperature of the base body in the processing process. The device for realizing the laser-induction hybrid melting direct forming method comprises a laser, a light path system, an induction heating and temperature control system, a powder feed system and the numerical control system. The device can be used for directly generating large and medium size three-dimensional parts on various metal base bodies, has the advantages of high processing efficiency, compact part structure, fine crystalline grain, excellent mechanical property, less residual stress without deformation or cracking phenomenon, high processing flexibility without tools and moulds, high material utilization ratio, cleanness without pollution and capability of designing the components of a metal-ceramic hybrid layer as required and even changing the components in a gradient manner.

A composite material featuring comminuted or otherwise well dispersed and separated nanotubes reinforcing a matrix featuring metal, ceramic and/or polymer. In a preferred embodiment, the nanotubes feature elemental carbon, and the composites can be produced using a molten silicon metal infiltration technique, which may be pressurized or not, for example, a siliconizing or a reaction-bonding process. In this preferred embodiment, carbon nanotubes may be prevented from chemically reacting with the silicon infiltrant by an interfacial coating disposed between the carbon nanotubes and the infiltrant. A reaction-bonded composite body containing even a small percentage of carbon nanotubes possessed a significant increase in electrical conductivity as compared to a reaction-bonded composite not containing such nanotubes, reflecting the high electrical conductivity of the nanotubes. When the nanotubes are well dispersed throughout the preform, mechanical property enhancements start to become noticeable, such as fracture toughness enhancement.

Metal-ceramic composite materials made by an infiltration technique have now been prepared using microwave energy as the heat source for thermal processing. Specifically, microwave energy has been used to heat and melt a source of silicon metal, which in turn has infiltrated carbon-containing preforms to make reaction-bonded silicon carbide composites, respectively. Both the time-at-temperature as well as the overall thermal cycle time have been greatly reduced, implying a large cost savings.

A technology for directly manufacturing part and mould without mould includes such steps as designing 3D CAD model of a part, tomographic processing to obtain the data of each layer, planning the route to generate the numeral control codes of each layer, and using numeral controlled plasma thermo-welding spray gun or argon arc welding gun to thermo-weld the alloy, intermetal compound, ceramal, or ceramic wire or powder for shaping layer by layer while combining the plasma arc or argon arc with laser beam. It has high speed and low cost.

The present invention relates to embodiments of a cutting tool holder having at least one insert pocket, wherein at least one insert pocket comprises a side surface and at least one antirotation stop protruding from the side surface. The antirotation stop may comprise at least two substantially planar surfaces. In certain embodiments, the cutting tool holder may have a pocket which comprises a bottom surface and an antirotation stop having three substantially planar surfaces that are substantially perpendicular to the bottom surface. The antirotation stop may be integral to the tool holder or may be produced separately and attached, either permanently or temporarily, to the tool holder. Embodiments may further comprise additional antirotation stops if desired by the machining application. In one embodiment, the cutting tool holder includes an insert pocket in the tool holder and at least one antirotation stop protruding from at least one of a side wall and the bottom surface of the insert pocket, wherein the antirotation stop comprises at least two substantially planar surfaces. A cutting insert may be secured in the tool holder, wherein the cutting insert has a recess having a shape that is non-complementary to the shape of the antirotation stop and may be made from tungsten based carbide or cermet.

The invention discloses a multiple boride metal ceramic based on a high-entropy alloy adhesion agent and a preparation method thereof. According to the boride metal ceramic, high-entropy alloy serves as an adhesion phase, multiple boride serves as a hard phase, the high-entropy alloy adhesion phase is composed of at least four of iron, cobalt, nickel, chromium, aluminum, vanadium, titanium, copper, zirconium, molybdenum and manganese, and the content mole ratio of each element is between 5% and 35%. The multiple boride hard phase comprises W2M1B2 or/and Mo2M2B2, wherein M1 and M2 are at least one of Fe, Ni, Co and Cr. The preparation method of the multiple boride metal ceramic based on the high-entropy alloy adhesion agent comprises the steps of ball-milling mixing, forming and low-pressure sintering.

The present invention relates to a soldering material, a preparation method thereof and a soldering method with the soldering material, which belong to the preparation methods and applications of soldering materials. The present invention resolves the problem that the connection strength and the working temperature are low after the prior Ti(C, N)-based cermet is connected with a metal, thus realizing the firm connection between the Ti(C, N)-based cermet and steel, and ensures that the joint has good connection strength and a high working temperature. The mass percentage of the ingredients of the soldering material of the present invention is as follows: 40 percent to 45 percent of Cu, 20 percent to 25 percent of Ag, 21 percent to 23 percent of Zn, 5 percent to 10 percent of Ni, 1 percent to 3 percent of Ti and 1 percent to 5 percent of Si. The preparation method includes the following steps: mixing, pressing, sintering and rolling, rolling the soldering material into a soldering material sheet. The soldering method with the soldering material includes the following steps: presoldering preparation, assembly, temperature increasing and temperature decreasing. The soldering material and the soldering method which are adopted by the present invention successfully realize the firm connection between the Ti(C, N)-based cermet and 45 steel, the maximum room-temperature shearing strength of the joint reaches 268.5MPa, and the average shearing strength reaches 240.9MPa.

The present invention provides an antibacterial ceramic cutting tool and belongs to the technological field of fine ceramics. The present invention comprises ingredients and is characterized in that the ceramic cutting tool is essentially made of fine ceramic material that is used as the main raw material, and 1.5 to 5 weight percent of antibacterial material. The fine ceramic material can be selected from ultra-fine zirconia powder, ceylon ceramic materials, alumina or silicon nitride that is used for plasticizing the ceramic materials, and metal ceramic materials such as titanium carbide or titanium nitride. The application of antibacterial ingredients in the fine ceramic material has resulted in the antibacterial and bacteriostatic properties of fine ceramic products. Further the ceramic cutting tool of the antibacterial function can be prepared.

The invention provides a heat-collecting tube with a solar energy selective absorbing coating and the manufacturing method thereof. The solar energy selective absorbing coating is deposited on the outer surface of the basis material steel tube, the two ends of the steel tube have a non-film area, the inner cavity is filled with flowing working substance, and the coating is formed by the following steps: forming a transition layer and an adhesion layer on the basis material, depositing a metal infrared reflection layer, sputtering a protective layer and a cermet absorbing layer and finally an antireflection layer. The manufacturing method is provided with the following steps: (1) the transition layer is formed on the basis by firing; (2) the adhesion layer and the infrared reflection layer are sputtered; (3) the proactive layer is coated by the magnetron sputtering method; (4) the cermet absorbing layer is deposited by the double-target sputtering method; (5) the antireflection layer is sputtered; and (6) the heat-collecting tube with the coating is subjected to vacuum treatment at 200-350 DEG C to enable the film coating to be compacter. The heat-collecting tube is applied to high temperature air, each performance is stable and realizable, and the service life is long.

The invention discloses a solar selective absorbing coating and a preparation method thereof. The coating comprises three layers of films from bottom to top on the surface of a heat absorber substrate; the first layer is an infrared reflective layer and consists of a metal molybdenum film; the second layer is an absorption layer, consists of a composite metal ceramic layer made from Ni-Al alloy particles and an insulating medium and is formed by two sublayers with different thicknesses and different Ni-Al alloy volume percentages in structure, wherein the thickness of the first sublayer is 35-70nm, the Ni-Al alloy volume percentage of the first sublayer is 40-60 percent, the thickness of the second sublayer is 30-60nm, and the Ni-Al alloy volume percentage of the second sublayer is 20-40 percent; the third layer is an anti-reflection layer formed by an aluminum oxide ceramic film. The preparation method thereof comprises three steps. Under the condition that an air quality factor AM is 1.5, the absorptivity of the coating is no less than 0.93, and the emissivity of the coating is no more than 0.09. The coating has good heat stability and can be used in the vacuum environment at the temperature of 600 DEG C for a long term. The invention has the practical value and wide application prospect in the technical field of solar heat utilization and thermal generation.

A CTE modified braze composition that can be utilized to manufacture a strong, gastight joint where at least one of the joining members comprises a ceramic (e.g., a ceramic or a cermet). The braze composition is formulated so as to reduce the thermal stress that results from the mismatch of thermal expansion coefficients between a ceramic joining member and the braze or other joining members. The braze composition comprises a braze alloy in powder, paste or bulk form mixed with one or more particulate or fibrous fillers that exhibit a low (i.e., no more than 6 ppm/K) or negative coefficient of thermal expansion. The braze composition can be used to join members, at least one of which comprises ceramic, and to a composite member produced by joining the two or more members.

A weak core ring structured novel cermet material based on (Ti, M) (C, N) solid solution powder comprises the following raw materials in percentage by weight: 10-20% of Co or/and Ni powder, 10-35% of type II carbide powder and the balance (Ti, M) (C, N) solid solution powder, wherein M in the (Ti, M) (C, N) solid solution powder is at least one of W, Mo, V, Cr, Ta and Nb; and the type II carbide is at least one of WC, VxC (x is more than 0 and not more than 1), Mo2C, Cr3C2, TaC and NbC. The novel cermet material is prepared by powder metallurgy.

A pair of opposing thin plate sections, movable sections, and fixed sections for supporting the thin plate sections and the movable sections are provided on a ceramic substrate. After a wiring pattern and a gap or an insulating layer of cermet layer for filling the gap are formed on a ceramic substrate, these are sintered. After that, piezoelectric/electrostrictive layers and cermet electrode layers including a piezoelectric/electrostrictive material and a conductive material are alternately stacked in a comb like structure on the ceramic substrate. Accordingly, a piezoelectric/electrostrictive device having the piezoelectric/electrostrictive element in multilayer structure is obtained.

The invention provides a method for preparing a ceramic particle enhanced metal matrix composite coating in a laser cladding mode through an asynchronous powder feeding method. A lateral powder feeding nozzle is fixed to one coaxial powder feeding nozzle and assembled into an asynchronous powder feeding nozzle; the lateral powder feeding nozzle is used for feeding ceramic particle enhancing phases into the portion between the middle portion and the tail portion of the side, opposite to the laser scanning direction, of a molten pool; the coaxial powder feeding nozzles are used for feeding alloy powder or metal ceramic composite powder to the center of the molten pool; a laser device is used for conducting laser cladding, and then the ceramic particle enhanced metal matrix composite coating is obtained. According to the method, the coaxial powder feeding method and the lateral powder feeding method are combined, the ceramic particle enhancing phases are fed into the low-temperature region at the rear portion of the molten pool, so that the phenomena of nonuniformity of melting decomposition, clustering and distribution of the ceramic particle enhancing phases are reduced, and the ceramic particle enhancing phases are evenly distributed in the whole coating by keeping the original appearance to the maximum extent; accordingly, the ceramic particle enhancing phases are effectively retained and evenly distributed, and the performance of the composite coating can be substantially improved.

A method for making a porous film includes the steps of forming a cermet film and/or a ceramic film by depositing or co-depositing suitable materials on a substrate, and causing metal in the material(s) to reduce and/or to diffuse to the cermet film surface and/or the ceramic film surface to render the porous film.