Entries |
Document | Title | Date |
20080280749 | Titanium Carbide Powder and Titanium Carbide-Ceramics Composite Powder and Method for Production Thereof, and Sintered Compact From the Titanium Carbide Powder and Sintered Compact From the Titanium Carbide/Ceramics Composite Powders and Method for Production Thereof - Disclosed is a highly-pure fine titanium carbide powder having a maximum particle size of 100 nm or less and containing metals except titanium in an amount of 0.05 wt % or less and free carbon in an amount of 0.5 wt % or less. The powder has a NaCl-type crystal structure, and a composition represented by TiCxOyNz, wherein X, Y and Z satisfy the relations: 0.5≦X≦1.0; 0≦Y≦0.3; 0≦Z≦0.2; and 0.5≦X+Y+Z≦1.0.) The powder is produced by: dissolving an organic substance serving as a carbon source in a solvent to prepare a liquid, wherein the organic substance contains at least one OH or COOH group which is a functional group coordinatable to titanium of titanium alkoxide, and no element except C, H, N and O; mixing titanium alkoxide with the liquid to satisfy the following relation: 0.7≦α≦1.0 (wherein α is a molar ratio of the carbon source to the titanium alkoxide), so as to obtain a precursor solution; and subjecting a product in the precursor solution to a heat treatment in a non-oxidizing atmosphere or a vacuum atmosphere at a temperature of 1050 to 1500° C. The present invention can provide fine titanium carbide powders with nano-scale particle sizes, which are free of inorganic impurities, such as titanium oxide and metal, low in free carbon, and effective in enhancing characteristics of a titanium carbide-ceramics composite sintered body. | 11-13-2008 |
20090042716 | High Temperature Reactor for the Poduction of Nanophase WC/CO Powder - A method for producing a nanostructured cermet material, including the steps of preparing an aqueous solution mixture of precursor compounds of the cermet material, introducing the solution mixture into a heated tubular reactor in the form of a fine-particle aerosol, and processing the solution mixture in the heated tubular reactor to form the nanostructured cermet material. The present invention is further directed to a processing apparatus configured for implementing the present method. | 02-12-2009 |
20090082191 | BORON CARBIDE CERAMIC AND MANUFACTURING METHOD THEREOF - Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al | 03-26-2009 |
20090305866 | Reduced Thermal Conductivity Thermal Barrier Coating by Electron Beam-Physical Vapor Deposition Process - A method for reducing thermal conductivity in thermal barrier coatings broadly includes the steps of depositing a mixture containing a ceramic matrix and a metallic dispersant capable of forming a metal oxide upon a substrate to form one or more layers; and heating the layers at a temperature and for a time sufficient to oxidize the metallic dispersant and form one or more layers of a thermal barrier coating. | 12-10-2009 |
20090318280 | BORON CARBIDE CERAMIC FIBERS - A metal carbide ceramic fiber having improved mechanical properties and characteristics and improved processes and chemical routes for manufacturing metal carbide ceramic fiber. Metal carbide ceramic fibers may be formed via reaction bonding of a metal-based material (e.g. boron) with the inherent carbon of a carrier medium. One embodiment includes a method of making a metal carbide ceramic fiber using VSSP to produce high yield boron carbide fiber. Embodiments of the improved method allow high volume production of high density boron carbide fiber. The chemical routes may include a direct production of boron carbide fiber from boron carbide powder (B | 12-24-2009 |
20100004114 | FIRED REFRACTORY CERAMIC PRODUCT - The invention relates to a fired refractory ceramic product. According to the invention, this generic term encompasses both shaped and unshaped products. Shaped products are ones which have a defined shape so that they can be manufactured in finished form on the premises of the manufacturer. Shaped products include: bricks, nozzles, tubes, stoppers, plates, etc. The term unshaped products includes ones which are usually produced by the user from a corresponding composition. They include bases for furnaces which are cast from a composition but also repair compositions, etc. | 01-07-2010 |
20100009839 | Ultrahard Composite Materials - The present invention concerns a method of producing an ultrahard abrasive composite material having a desirable overall thermal expansion coefficient mismatch, between the ultrahard particles and their matrix materials. The method includes the steps of providing a volume fraction of ultrahard particles having a pre-determined thermal expansion coefficient; determining the volume fraction and thermal expansion coefficient of a matrix material that would be required to produce an ultrahard composite material having a desired overall thermal expansion coefficient mismatch; contacting the ultrahard particles and the matrix material to form a reaction volume; and consolidating and sintering the reaction volume at a pressure and a temperature at which the ultrahard particles are crystallographically or thermodynamically stable. Ultrahard composites where the ultrahard particles are cubic boron nitride and/or diamond are provided, with matrix materials chosen to produce thermal expansion mismatches within specific value ranges, and associated, controlled residual stresses. Ultrahard composite matrices involving combinations of nitride matrices such as titanium nitride/tantalum nitride, and titanium nitride/chromium nitride are exemplified. | 01-14-2010 |
20100099548 | COMPOSITE SINTERED BODY - The composite sintered body of the invention is a composite sintered body, containing 20 volume % or more and 80 volume % or less of cubic boron nitride particles, and a binder; wherein the binder contains at least one selected from the group consisting of nitrides, carbides, borides, and oxides of elements in the group 4a, elements in the group 5a, and elements in the group 6a in the periodic table, and solid solutions thereof, at least one selected from the group consisting of simple substances of Zr, Si, Hf, Ge, W and Co, compounds thereof, and solid solutions thereof, and a compound of Al; and when the composite sintered body contains therein W and/or Co, the total weight of the W and/or Co is less than 2.0 weight % and further the composite sintered body contains therein one or more of the Zr, Si, Hf and Ge (hereinafter referred to as “X”), and when the composite sintered body contains the X, the amount of each of the X is 0.005 weight % or more and less than 2.0 weight %, X/(X+W+Co) is 0.01 or more and 1.0 or less and further the weight of Al is 2.0 weight % or more and 20.0 weight % or less. | 04-22-2010 |
20100137123 | SINTERED BODY AND PRODUCTION METHOD THEREOF - An object is to provide a sintered body having a sufficiently higher polishing rate than a conventional AlTiC sintered body and providing a sufficiently smooth air bearing surface. The sintered body according to the present invention consists of Al | 06-03-2010 |
20100184582 | MIXED POWDER AND SINTERED BODY, MIXED CERMET POWDER AND CERMET, AND FABRICATION METHODS THEREOF - A mixed powder and a sintered body obtained by sintering the mixed powder. The mixed powder includes a solid-solution powder with complete solid-solution phase. The solid-solution powder includes a carbide or a carbonitride of at least two metals selected, including Ti, from metals of Groups IVa, Va and VIa of the periodic table, or a mixture thereof. A mixed cermet powder and a cermet obtained by sintering the mixed cermet powder are also disclosed. The mixed cermet powder includes at least a cermet powder with complete solid-solution phase. The cermet powder includes a carbide or a carbonitride of at least two metals selected, including Ti, from metals of Groups IVa, Va and VIa of the periodic table, or a mixture thereof, and at least one metal selected from the group consisting of Ni, Co and Fe. Also disclosed are a sintered body and a fabrication method of a cermet. | 07-22-2010 |
20100184583 | DENSE BORON CARBIDE CERAMIC AND PROCESS FOR PRODUCING THE SAME - An aspect of the present invention is to provide an economical production technology for obtaining a dense boron carbide ceramic product without impairment to excellent mechanical properties, which boron carbide ceramics are inherently equipped with, by conducting heating under normal pressure without application of pressure and without needing addition of a large amount of a sintering additive to a raw material or needing any special additive or treatment. The present invention provides a production process in which, upon heating a boron carbide green body under normal pressure without application of pressure after pressing a boron carbide powder material to obtain the boron carbide green body, the boron carbide green body is heated with one of a powder, green body or sintered body, which contains at least one of aluminum and silicon, being disposed in a furnace. | 07-22-2010 |
20100267541 | Nano-ceramics and method thereof - A method for producing ceramic materials utilizing the sol-gel process enables the preparation of intimate homogeneous dispersions of materials while offering the ability to control the size of one component within another. The method also enables the preparation of materials that densify at reduced temperatures. Applications of the compositions include filters, solid-oxide fuel cells, membranes, ceramic cutting tools and wear and auto parts. In one example, 10 g of AlCl | 10-21-2010 |
20100267542 | SOLID-SOLUTION CARBIDE/CARBONITRIDE POWDER AND METHOD FOR PREPARING THEREOF UNDER HIGH TEMPERATURE - The present invention relates to a complete solid solution powder used for preparing a cermet composite sintered body, and method for preparing thereof under high temperature. Particularly, the present invention is directed to a complete solid solution powder which can improve, to a great extent, toughness of a cermet sintered body which is used for high-speed cutting tool materials and die materials in the field of metal working, such as various machine industries and automobile industry, and method for preparing thereof under high temperature. | 10-21-2010 |
20100273636 | MIX AND REFRACTORY PRODUCT HAVING A HIGH HYDRATION RESISTANCE PRODUCED THEREFROM - Mix which comprises a) one or more very finely divided silicon dioxide powders having an average particle diameter of from 2 to 100 nm and a BET surface area of at least 30 m | 10-28-2010 |
20110160034 | Titanium carbide powder and titanium carbide-ceramics composite powder and method for production thereof, and sintered compact from the titanium carbide powder and sintered compact from the titanium carbide/ ceramics composite powders and method for production thereof - Disclosed is a highly-pure fine titanium carbide powder having a maximum particle size of 100 nm or less and containing metals except titanium in an amount of 0.05 wt % or less and free carbon in an amount of 0.5 wt % or less. The powder has a NaCl-type crystal structure, and a composition represented by TiCxOyNz, wherein X, Y and Z satisfy the relations: 0.5≦X≦1.0; 0≦Y≦0.3; 0≦Z≦0.2; and 0.5≦X+Y+Z≦1.0.) The powder is produced by: dissolving an organic substance serving as a carbon source in a solvent to prepare a liquid, wherein the organic substance contains at least one OH or COOH group which is a functional group coordinatable to titanium of titanium alkoxide, and no element except C, H, N and O; mixing titanium alkoxide with the liquid to satisfy the following relation: 0.7≦α≦1.0 (wherein α is a molar ratio of the carbon source to the titanium alkoxide), so as to obtain a precursor solution; and subjecting a product in the precursor solution to a heat treatment in a non-oxidizing atmosphere or a vacuum atmosphere at a temperature of 1050 to 1500° C. The present invention can provide fine titanium carbide powders with nano-scale particle sizes, which are free of inorganic impurities, such as titanium oxide and metal, low in free carbon, and effective in enhancing characteristics of a titanium carbide-ceramics composite sintered body. | 06-30-2011 |
20110257003 | TRANSITION METAL-INCLUDED TUNGSTEN CARBIDE, TUNGSTEN CARBIDE DIFFUSED CEMENTED CARBIDE, AND PROCESS FOR PRODUCING SAME - This invention is related to a powder of a transition metal dissolved tungsten alloy carbide which comprises a transition metal element forcibly dissolved as a solid solution which represented by Formula [1] of M-W—C wherein M is one or more of Co, Fe, Ni and Mn and its tungsten alloy carbide diffused cemented carbide. The diffused cemented carbide is compatible with the conventional tungsten carbide diffused cemented carbide and comprises a binder metal and a tungsten alloy carbide which is provided with a solid solution phase of at least one transition metal element selected from the group consisting of cobalt, iron, nickel and manganese, included in a tungsten carbide skeleton, which exhibits a peak derived from a bcc tungsten phase in an X-ray diffraction diagram. | 10-20-2011 |
20110287923 | HIGH-TOUGHNESS ZETA-PHASE CARBIDES - A ceramic material having a high toughness can include carbon and a transition metal. The transition metal can have an elemental body centered cubic structure at room temperature. A substantial amount of the ceramic can be of a rhombohedral ζ phase of the transition metal and carbon. These materials can have a high thermal shock resistance, high fracture toughness, and good high temperature performance. A particulate mixture of a carbon source and a transition metal source can be assembled ( | 11-24-2011 |
20110287924 | METHODS OF FORMING AT LEAST A PORTION OF EARTH-BORING TOOLS, AND ARTICLES FORMED BY SUCH METHODS - Methods of forming at least a portion of an earth-boring tool include providing particulate matter comprising a hard material in a mold cavity, melting a metal and the hard material to form a molten composition comprising a eutectic or near-eutectic composition of the metal and the hard material, casting the molten composition to form the at least a portion of an earth-boring tool within the mold cavity, and providing an inoculant within the mold cavity. Methods of forming a roller cone of an earth-boring rotary drill bit comprise forming a molten composition, casting the molten composition within a mold cavity, solidifying the molten composition to form the roller cone, and controlling grain growth using an inoculant as the molten composition solidifies. Articles comprising components of earth-boring tools are fabricated using such methods. | 11-24-2011 |
20120172192 | Compositions and methods for making ceramic plates - Compositions and methods of making ceramic plates are described. The compositions are water-based slurries that include filler material, one or more clay components, one or more strength or processing additives, and/or a carbon source. The filler material can include a first grade of boron carbide having a relatively large average particle size, a second grade of boron carbide having an intermediate average particle size, a third grade of boron carbide having a fine average particle size, and/or a silicon carbide having a fine average particle size. The methods of the invention involve casting and drying the slurry to make a substantially dry preform, providing a silicon loaf having a solid form for supporting one or more preforms, placing the substantially dry preform on top of the silicon loaf inside of an infiltration furnace and heating the substantially dry preform and loaf to melt silicon within the loaf and infiltrate the perform to create a ceramic plate. | 07-05-2012 |
20120289395 | COMPOSITE SYSTEM - A multiphase composite system is made by binding hard particles, such as TiC particles, of various sizes with a mixture of titanium powder and aluminum, nickel, and titanium in a master alloy or as elemental materials to produce a composite system that has advantageous energy absorbing characteristics. The multiple phases of this composite system include an aggregate phase of hard particles bound with a matrix phase. The matrix phase has at least two phases with varying amounts of aluminum, nickel, and titanium. The matrix phase forms a bond with the hard particles and has varying degrees of hard and ductile phases. The composite system may be used alone or bonded to other materials such as bodies of titanium or ceramic in the manufacture of ballistic armor tiles. | 11-15-2012 |
20120295783 | SHAPED METAL-CONTAINING COMPONENTS AND REACTION BASED METHODS FOR MANUFACTURING THE SAME - Methods of converting shaped templates into shaped metal-containing components, allowing for the production of freestanding, porous metal-containing replicas whose shapes and microstructures are derived from a shaped template, and partially or fully converting the shaped templates to produce metal-containing coatings on an underlying shaped template are described herein. Such coatings and replicas can be applied in a variety of fields including, but not limited to, catalysis, energy storage and conversion, and various structural or refractory materials and structural or refractory composite materials. | 11-22-2012 |
20120329632 | Composite Compacts Formed of Ceramics and Low Volume Cubic Boron Nitride and Method of Manufacture - A composite compact formed by sintering, at high temperature/high pressure, a composition including cBN in a range of about 5 to about 60 vol. %, zirconia (or in the range about 5 to about 20 vol. %), and other ceramic material. Subsequent to sintering, the zirconia exists in the cubic phase and/or tetragonal phase. The zirconia may be either stabilized or unstabilized prior to sintering. The other ceramic material may include one or more of nitrides, borides, and carbides of Ti, Zr, Hf, Al, Si, or Al | 12-27-2012 |
20130059719 | Aluminum oxycarbide composition, production method therefor, and refractory material - It is an object to provide an aluminum oxycarbide composition capable of suppressing oxidation of Al | 03-07-2013 |
20130065749 | YTTRIA-BASED SLURRY COMPOSITION - An yttria-based slurry composition comprising yttria, an aqueous silica binder system or an aqueous ammonium zirconium carbonate binder system and a fluorine compound, which is selected from ammonium fluoride, ammonium hydrogen difluoride, sodium fluoride, potassium fluoride, sodium hydrogen difluoride and/or potassium hydrogen difluoride and a method of stabilizing an yttria-based slurry composition comprising yttria and an aqueous silica binder system or an aqueous ammonium zirconium carbonate binder system which method comprises treating the composition, preferably treating the binder system, with a fluorine compound which is selected as indicated above. | 03-14-2013 |
20130079214 | HIGH TEMPERATURE REFRACTORY COATINGS FOR CERAMIC SUBSTRATES - A method of manufacturing a composite article includes pyrolyzing a preceramic polymer to form a non-oxide ceramic matrix and a byproduct, and reacting the refractory material with the byproduct to form a refractory phase within the non-oxide ceramic matrix. | 03-28-2013 |
20130079215 | SINTERED CUBIC BORON NITRIDE COMPACT AND SINTERED CUBIC BORON NITRIDE COMPACT TOOL - It is an object of the present invention to provide a sintered cBN compact having excellent wear resistance and fracture resistance even in machining centrifugally cast iron having a property of being difficult to machine, and to provide a sintered cBN compact tool. A sintered cBN compact of the present invention contains 20% by volume or more and 65% by volume or less of cBN and, as a binder, 34% by volume or more and less than 80% by volume of Al | 03-28-2013 |
20130157835 | BORON CARBIDE-CONTAINING CERAMIC BONDED BODY AND METHOD FOR PRODUCING THE BONDED BODY - A bonded, boron carbide-containing ceramic body includes ceramic members. These ceramic members each contain boron carbide at 2 mass % or higher, and are integrated together via a bonding layer bonded with a bonding material containing at least one metal selected from the group consisting of aluminum, copper, gold and zirconium or integrated together via a bonding layer formed from one of aluminum metal and an aluminum compound and a titanium compound as bonding materials, wherein a bonded part has a strength of 100 MPa or higher. According to this technology, the boron carbide-containing ceramic members can be bonded together with a high strength of 100 MPa or more by a simple process, and further, the bonding is feasible with excellent chemical resistance at the bonded part as needed. | 06-20-2013 |
20130237403 | FORMATION OF BORON CARBIDE-BORON NITRIDE CARBON COMPOSITIONS - A composition having nanoparticles of a boron carbide and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising boron and an organic component. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining boron and an organic compound having a char yield of at least 60% by weight, and heating to form boron carbide or boron nitride nanoparticles. | 09-12-2013 |
20130288879 | HIGH-RIGIDITY CERAMIC MATERIAL AND PRODUCTION METHOD THEREFOR - Disclosed is a boron carbide-based ceramics material which has a high density and a high specific rigidity, but additionally with excellent processability, and a production method for the boron carbide-based ceramics material. Specifically, the high-rigidity ceramics material contains boron carbide in an amount of 90 to 99.5 mass %, wherein at least silicon, aluminum, oxygen and nitrogen coexist in a grain boundary phase between crystal grains of the boron carbide. This high-rigidity ceramics material can be produced by a method comprising: preparing a boron carbide powder, and, as a sintering aid, one or more selected from the group consisting of an oxide, a nitride and an oxynitride of silicon, an oxide, a nitride and an oxynitride of aluminum, and a composite oxide, a composite nitride and a composite oxynitride of aluminum and silicon, in such a manner as to contain all of Si, Al, O and N; and subjecting the boron carbide powder and the sintering aid to mixing, forming and sintering. | 10-31-2013 |
20130303356 | METHOD FOR PRODUCING A SINTERED COMPOSITE BODY - The present invention relates to a method of producing a sintered composite body comprising cubic boron nitride particles dispersed in a cemented carbide matrix by sintering a mixture comprising cubic boron nitride particles and a cemented carbide powder at a sintering temperature below 1350° C. without applying a pressure. | 11-14-2013 |
20140100103 | METHOD OF PRODUCING CARBIDE AND CARBON NITRIDE POWDERS CONTAINING BINDER, AND CERMET OBTAINED FROM THE SAME - Disclosed is a method of producing carbide and carbon nitride powders containing a binder, and cermet obtained from the same. | 04-10-2014 |
20140274656 | ACETYLENE AND DIACETYLENE COMPOUNDS OF TRANSITION METALS - A compound having the moiety M-[(C≡C) | 09-18-2014 |
20140329662 | FORMATION OF BORON CARBIDE-BORON NITRIDE CARBON COMPOSITIONS - A composition having nanoparticles of a boron carbide and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising boron and an organic component. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining boron and an organic compound having a char yield of at least 60% by weight, and heating to form boron carbide or boron nitride nanoparticles. | 11-06-2014 |
20150105234 | TUNGSTEN NITRIDO PRECURSORS FOR THE CVD OF TUNGSTEN NITRIDE, CARBONITRIDE, AND OXIDE FILMS - Embodiments of the invention are directed to a method of preparing a WN | 04-16-2015 |
20150315087 | DIAMOND POLYCRYSTALLINE BODY AND METHOD FOR MANUFACTURING THE SAME, AND TOOL - Provided are a diamond polycrystalline body having a longer life than conventional diamond polycrystalline bodies when it is slid, a method for manufacturing the same, and a tool. In a diamond polycrystalline body, at least one element whose sulfide or chloride has a melting point of less than or equal to 1000° C. is added thereto, and crystal grains have an average grain size of less than or equal to 500 nm. Thereby, wear of diamond can be suppressed, and the diamond polycrystalline body can have a longer life when it is slid. | 11-05-2015 |
20160002115 | Synthesis and Processing of Ultra High Hardness Boron Carbide - A super-hard material is a late transition metal doped B | 01-07-2016 |
20160016857 | METHOD FOR PRODUCING LOW POROSITY NONOXIDE CERAMICS - The present invention relates to a method of producing ultra-high melting point nonoxide ceramics with low porosity based on sintering at low temperatures of below about 1000° C. with low DC electric fields of less than about 100 V/cm. | 01-21-2016 |
20160060180 | Composite Material Comprising a Precious Metal, Manufacturing Process and Use of Such Material - A composite material combining—a precious metal or an alloy containing a precious metal—and a boron-based ceramic having a melting point greater than that of said precious metal and a density at most equal to 4 g/cm3. | 03-03-2016 |
20160115085 | NEW PROCESS OF MANUFACTURING CEMENTED CARBIDE AND A PRODUCT OBTAINED THEREOF - A process of manufacturing cemented carbide and to a product obtained thereof wherein hex doped WC is subjected to nitrogen before and/or during sintering. | 04-28-2016 |