Elemental Carbon Containing (e.g., Graphite, Etc.) Patents (Class 156/89.25)
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Patent number: 10590044Abstract: An engineered matrix is provided to blunt and self-heal matrix cracks to reduce oxygen ingress into a fiber reinforced composite.Type: GrantFiled: January 20, 2017Date of Patent: March 17, 2020Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space AdministrationInventor: Sai V. Raj
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Patent number: 10077693Abstract: A ceramic honeycomb structure having pluralities of flow paths partitioned by porous cell walls; (a) the cell walls having porosity of 50-60%; and (b) in a pore diameter distribution in the cell walls measured by mercury porosimetry, (i) pore diameters at cumulative pore volumes corresponding to particular percentages of the total pore volume being within specific ranges and having specific relationships; and (ii) the difference between a logarithm of the pore diameter at a cumulative pore volume corresponding to 20% of the total pore volume and a logarithm of the pore diameter at 80% being 0.39 or less, and its production method.Type: GrantFiled: September 18, 2017Date of Patent: September 18, 2018Assignee: HITACHI METALS, LTD.Inventor: Shunji Okazaki
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Patent number: 10046264Abstract: A non-extruded filter article, including: an activated carbon honeycomb substrate having a plurality of flow-through channels and porous walls, and the activated carbon substrate comprises a carbon in from 90 to 99.9 wt. % of the article, and the porous walls have a percentage porosity of from 40% to 65%. Also disclosed is a non-extrusion method of making the article and a method of using the article.Type: GrantFiled: September 30, 2015Date of Patent: August 14, 2018Assignee: Corning IncorporatedInventors: Keith Leonard House, Benedict Yorke Johnson
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Patent number: 9770841Abstract: Embodiments of the present disclosure relate to a hot press and methods of using the hot press. In an embodiment, the hot press can include a pressing element including a flared body. In another embodiment, the hot press can include a compression surface. The compression surface can include a first layer including a monocrystalline material and a second layer including a polycrystalline material, wherein the monocrystalline material and the polycrystalline material include a same primary compound. In a further embodiment, a sample including more than one layer of ceramic oxide material can be hot pressed without a die.Type: GrantFiled: May 20, 2015Date of Patent: September 26, 2017Assignee: SAINT-GOBAIN CERAMICS & PLASTICS, INC.Inventors: Aravind Mohanram, Brian P. Feldman, Yeshwanth Narendar, John D. Pietras, F. Michael Mahoney, Wesley R. Robbins
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Patent number: 8956481Abstract: The present invention relates to a method of assembling carbon parts using a braze based on silicon carbide. The invention also relates to the parts assembled using such a method.Type: GrantFiled: September 3, 2009Date of Patent: February 17, 2015Assignees: Commissariat a l'Energie Atomique et aux Energies Alternatives, Institut National Polytechnique de GrenobleInventors: Jean-Paul Garandet, Denis Camel, Beatrice Drevet, Nicolas Eustathopoulos, Rana Israel
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Patent number: 8871044Abstract: After making a carbon fiber preform and prior to completing densification of the preform with a carbon matrix, impregnation is performed with a liquid formed of a sol-gel type solution and/or a colloidal suspension enabling one or more zirconium compounds to be dispersed. The impregnation and the subsequent treatment, up to obtaining the final part, are performed in such a manner as to have, in the final part, grains or crystallites of one or more zirconium compounds presenting a fraction by weight lying in the range 1% to 10% and of composition having at least a majority of the ZrOxCy type with 1?x?2 and 0?y?1.Type: GrantFiled: May 12, 2010Date of Patent: October 28, 2014Assignee: Messier-Bugatti-DowtyInventors: Sandrine Baud, Pascale Jacquemard, René Pailler, Magali Rollin, Michaël Podgorski
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Publication number: 20120164441Abstract: Achieved is a ceramic carbon composite material and a ceramic-coated ceramic carbon composite material which are lighter than ceramics and excellent in at least one of properties including oxidation resistance, resistance to dust generation, heat conductivity, electrical conductivity, strength, and denseness. The ceramic carbon composite material is a ceramic carbon composite material in which an interfacial layer of a ceramic is formed between carbon particles of or containing graphite. The ceramic carbon composite material can be produced by forming a green body from ceramic-coated powder in which the surfaces of carbon particles of or containing graphite are coated with individual ceramic layers and sintering the green body.Type: ApplicationFiled: September 1, 2010Publication date: June 28, 2012Applicant: TOYO TANSO CO., LTD.Inventors: Yoshinari Miyamoto, Weiwu Chen, Masaharu Nakamura, Taihei Matsumoto, Tetsuro Tojo
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Patent number: 7922845Abstract: An apparatus for bonding a first carbon composite to a second carbon composite through a reactant layer includes a housing, and a pair of conductive press plates electrically isolated from the housing. The press plates are adapted to position the two parts to be bonded with a reactant layer therebetween. The press plates are subjected to an electrical potential and a clamping force, sufficient to initiate a combustion reaction that creates a molten ceramic to bond together the carbon-carbon composites.Type: GrantFiled: March 29, 2006Date of Patent: April 12, 2011Assignees: Honeywell International Inc., University of Notre Dame Du LacInventors: Allen H. Simpson, Slawomir T. Fryska, Mark L. La Forest, Roger L. Klinedinst, Alexander Mukasyan, Charles D. D'Amico
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Patent number: 7879169Abstract: A method for producing a ceramic compact includes a laminate-preparing step of preparing an unfired laminate including a base layer including a ceramic powder and a glass material and a constraining layer that is in contact with at least one principal surface of the base layer and that primarily includes a burnable material which does not burn off when the burnable material is fired in a low-oxygen atmosphere but which burns off when the burnable material is fired at an oxygen partial pressure greater than that of the low-oxygen atmosphere, and a firing step of firing the unfired laminate to sinter the base layer. The firing step includes a first firing sub-step of firing the laminate including the constraining layer to sinter the base layer and a second firing sub-step of firing at an oxygen partial pressure greater than that of the first firing sub-step such that the burnable material included in the constraining layer burns off.Type: GrantFiled: October 21, 2008Date of Patent: February 1, 2011Assignee: Murata Manufacturing Co., Ltd.Inventor: Takaki Murata
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Publication number: 20100319895Abstract: A heat spreader structure includes at least one carbonaceous matter-metal composite layer having a plurality of carbonaceous particles and at least one metal-mesh layer having a plurality of meshes. The carbonaceous particles are either separately firmly held inside the meshes of the metal-mesh layer or covered and held in place by the metal-mesh layer. The carbonaceous matter-metal composite layer can be coated on a metal-made body through sintering to ensure good bonding of the carbonaceous particles to the metal-made body and accordingly enhance the heat spreading efficiency of the metal-made body. A method for manufacturing the heat spreader structure is also disclosed.Type: ApplicationFiled: June 19, 2009Publication date: December 23, 2010Inventors: Wei-En Chen, Ying-Tung Chen
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Patent number: 7819995Abstract: There is provided a method of manufacturing a multilayer ceramic substrate, the method including: providing a non-sintered multilayer ceramic substrate having a plurality of low temperature sintering green sheets laminated therein; disposing a hard-to-sinter constraining green sheet on at least one of top and bottom surfaces of the non-sintered multilayer ceramic substrate; sintering the non-sintered multilayer ceramic substrate having the hard-to-sinter constraining layer disposed thereon; immersing the sintered multilayer ceramic substrate into an acidic solution; and activating a contact between the hard-to-sinter constraining layer and the acidic solution such that the hard-to-sinter constraining layer is removed.Type: GrantFiled: March 25, 2009Date of Patent: October 26, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Yong Suk Kim, Byeung Gyu Chang, Taek Jung Lee
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Publication number: 20100239885Abstract: A method for producing a high temperature-resistant article comprises an assembling step of foaming an assembly of a first substrate and a second substrate with an adhesive layer interposed therebetween and comprising paste of powder of at least one carbide of niobium carbide, hafnium carbide, tantalum carbide and tungsten carbide; and a bonding step of heating the assembly to bond the first substrate and the second substrate by sintering, thereby obtaining a high temperature-resistant article comprising the assembly after sintering.Type: ApplicationFiled: March 15, 2010Publication date: September 23, 2010Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventor: Daisuke Nakamura
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Publication number: 20100139841Abstract: The invention relates to a method for the manufacture of a ceramic component of desired final geometry using at least a cellulose-containing semi-finished moulded part, which is pyrolysed in non-oxidizing gas atmosphere. In order to manufacture complex components, it is suggested that at least two semi-finished moulded parts are firmly joined either in raw form or after at least partial carbonisation. The joined moulded parts are subsequently machined to achieve the desired final geometry or a geometry corresponding to the desired final geometry plus the machining allowance. Then, the carbon parts are available after carbonisation of the moulded parts in non-oxidizing atmosphere. Alternatively, these can be converted into a CMC composite material in a non-oxidizing gas atmosphere by a metal infiltration process with simultaneous reactive joining of at least two moulded parts.Type: ApplicationFiled: November 27, 2009Publication date: June 10, 2010Applicants: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e. V., Schunk Kohlenstofftechnik GmbHInventors: Stefan SIEGEL, Roland WEISS, Andreas LAUER, Gotthard NAUDITT
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Publication number: 20100051173Abstract: There is provided a method of manufacturing a multilayer ceramic substrate, the method including: providing a non-sintered multilayer ceramic substrate having a plurality of low temperature sintering green sheets laminated therein; disposing a hard-to-sinter constraining green sheet on at least one of top and bottom surfaces of the non-sintered multilayer ceramic substrate; sintering the non-sintered multilayer ceramic substrate having the hard-to-sinter constraining layer disposed thereon; immersing the sintered multilayer ceramic substrate into an acidic solution; and activating a contact between the hard-to-sinter constraining layer and the acidic solution such that the hard-to-sinter constraining layer is removed.Type: ApplicationFiled: March 25, 2009Publication date: March 4, 2010Inventors: Yong Suk KIM, Byeung Gyu CHANG, Taek Jung LEE
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Publication number: 20090173015Abstract: Polycrystalline diamond constructions include a diamond body comprising a matrix phase of bonded together diamond crystals formed at high pressure/high temperature conditions with a catalyst material. The sintered body is treated remove the catalyst material disposed within interstitial regions, rendering it substantially free of the catalyst material used to initially sinter the body. Accelerating techniques can be used to remove the catalyst material. The body includes an infiltrant material disposed within interstitial regions in a first region of the construction. The body includes a second region adjacent the working surface and that is substantially free of the infiltrant material. The infiltrant material can be a Group VIII material not used to initially sinter the diamond body. A metallic substrate is attached to the diamond body, and can be the same or different from a substrate used as a source of the catalyst material used to initially sinter the diamond body.Type: ApplicationFiled: March 6, 2009Publication date: July 9, 2009Applicant: SMITH INTERNATIONAL, INC.Inventors: Madapusi K. Keshavan, Anthony Griffo, Yuelin Shen, Youhe Zhang
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Publication number: 20090155625Abstract: [Problem] It is an object to provide a joining method that enables to join aluminum nitride sinters together efficiently and tightly. [Means for solution] A method of joining an aluminum nitride sinter includes placing an inclusion including a sintering aid between a surface to be joined of one aluminum nitride sinter and a surface to be joined of the other aluminum nitride sinter, and heating the inclusion by electromagnetic wave irradiation, thereby joining the aluminum nitride sinters together.Type: ApplicationFiled: March 29, 2007Publication date: June 18, 2009Inventors: Yukihiro Kanechika, Masanobu Azuma, Masaki Yasuoka, Koji Watari
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Patent number: 7497918Abstract: Within the pores of a porous thermostructural composite material, there is form an aerogel or xerogel made up of a precursor for a refractory material, the precursor is transformed by pyrolysis to obtain an aerogel or xerogel of refractory material, and then it is silicided by being impregnated with a molten silicon type phase. The aerogel or xerogel is formed by impregnating the composite material with a composition containing at least one organic, organometalloid, or organometallic compound in solution, followed by in situ gelling. The method is applicable to improving the tribological properties or the thermal conductivity of C/C or C/SiC composite material parts, or to making such parts leakproof.Type: GrantFiled: February 16, 2004Date of Patent: March 3, 2009Assignee: Snecma Propulsion SolideInventors: Jacques Thebault, René Pailler, Jean-Christophe Ichard
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Publication number: 20090032168Abstract: A method for producing a ceramic compact includes a laminate-preparing step of preparing an unfired laminate including a base layer including a ceramic powder and a glass material and a constraining layer that is in contact with at least one principal surface of the base layer and that primarily includes a burnable material which does not burn off when the burnable material is fired in a low-oxygen atmosphere but which burns off when the burnable material is fired at an oxygen partial pressure greater than that of the low-oxygen atmosphere, and a firing step of firing the unfired laminate to sinter the base layer. The firing step includes a first firing sub-step of firing the laminate including the constraining layer to sinter the base layer and a second firing sub-step of firing at an oxygen partial pressure greater than that of the first firing sub-step such that the burnable material included in the constraining layer burns off.Type: ApplicationFiled: October 21, 2008Publication date: February 5, 2009Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Takaki MURATA
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Patent number: 7416061Abstract: In a brake member having a brake lining bonded to a brake shoe, the brake shoe has a chemical conversion coating provided on the surface thereof and a ceramics coating layer provided on the chemical conversion coating which has been formed by dipping in a ceramics precursor solution. The brake lining is bonded to the ceramics coating layer by heating under pressure. A method for bonding a brake lining and a brake shoe is provided with a step of degreasing, cleaning and acid-washing the surface of a brake shoe and then forming a chemical conversion coating thereon, a step of dipping the brake shoe having a chemical conversion coating formed thereon in a ceramics precursor solution to effect ceramics coating and a step of bonding a dried brake lining to the brake shoe under heating and pressure.Type: GrantFiled: March 30, 2007Date of Patent: August 26, 2008Assignee: Akebono Brake Industry Co., Ltd.Inventors: Hiroshi Idei, Sho Kurihara, Yoshiyuki Sugai, Katsuhiro Kikuchi, Yoshihiro Aoyagi
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Publication number: 20070259185Abstract: High-temperature-resistant composites are formed of at least two layers of high-temperature-resistant carbon-based materials or graphite-based materials. The layers are joined to one another by a carbonized binder which contains planar anisotropic graphite particles. The planar anistropic graphite particles have a high anisotropy in respect of their crystal structure and their thermal conductivity are added to the carbonizable binder.Type: ApplicationFiled: May 4, 2007Publication date: November 8, 2007Inventors: Karl Hingst, Martin Christ, Elmar Eber
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Patent number: 7067077Abstract: Carbon-silicon carbide brake preforms are manufactured by carbonizing a blend of carbon (e.g., polyacrylonitrile) fibers and thermosetting pitch resin, optionally along with a lubricant such as graphite,.to provide an intermediate product having open porosity and subsequently filling the pores of the intermediate product with silicon by a melt infiltration process. Molded articles that consist principally of carbon, that have relatively high strength and resistance to decomposition by frictional heat, and that are suitable for melt infiltration with silicon, are produced by, e.g.Type: GrantFiled: April 27, 2004Date of Patent: June 27, 2006Assignee: Honeywell International Inc.Inventor: Paul E. Gray
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Patent number: 7052632Abstract: A fiber preform constituting fiber reinforcement of a composite material part that is to be fabricated is made by superposing and bonding together fiber plies, and by densifying the needled preform by introducing a material constituting the matrix of the composite material into it. During the process of making the preform, a powder is dusted onto the surface of at least some of the plies, the powder comprising at least one ingredient selected from a solid resin in powder form and solid fillers in powder form. The powder is dusted onto the surface of the top ply of the preform that is being made, prior to superposing and needling at least one additional ply.Type: GrantFiled: December 10, 2002Date of Patent: May 30, 2006Assignee: SNECMA Propulsion SolideInventors: Eric Lavasserie, Jean-Michel Guirman, Eric Bouillon, Eric Philippe
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Patent number: 6908660Abstract: The present invention relates to shaped bodies made of fiber-reinforced ceramic composites and comprising a core zone and at least one covering layer which has a coefficient of thermal expansion which is higher than that of the core zone. The covering layer is an SiC-rich covering layer and is divided into segments which are separated from the adjacent segments by gaps or bridging zones of a material which is different from the material of the segments. The invention also relates to a process for producing such shaped bodies by infiltration of an intermediate body with molten silicon and their use for friction disks, in vehicle construction or as protective plates.Type: GrantFiled: November 22, 2002Date of Patent: June 21, 2005Assignee: SGL Carbon AGInventors: Moritz Bauer, Nadine Hander, Andreas Kienzle, Rainer Zimmermann-Chopin
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Patent number: 6797094Abstract: The present invention relates to a process for the production of a braking band for a brake disk with venting passages and to a braking band which can be produced by the process. The process comprises the following steps: molding a core (200) of the braking band in a suitable mold (1), molding two covers (8) onto the core in a further suitable mold (101) so as to form a semi-finished product having a “sandwich” structure, firing the semi-finished product so as to produce a predetermined porosity of the covers, firing the semi-finished product further, in the presence of silicon, at a temperature such as substantially to bring about fusion of the silicon and its infiltration into the covers.Type: GrantFiled: June 23, 2003Date of Patent: September 28, 2004Assignee: Freni Brembo S.p.A.Inventors: Giovanni Paolo Pacchiana, Ralf Siegfried Goller
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Publication number: 20040076810Abstract: A composite high temperature insulator (A) includes a planar layer (10) having anisotropic thermal conductivity properties. A second planar layer (12) is formed from a rigid insulation material, such as a carbonized mixture of carbon fibers and a binder. The second layer is coextensive with the first layer and is preferably bonded thereto by a carbonaceous cement (44). When used to insulate a heat source, such as a furnace (50), convective heat is directed back to the source by the reflective surface (16) of the inner, anisotropic layer (10). Heat which enters the anisotropic layer is dissipated evenly through the plane of the layer along a plurality of heat paths defined by a plurality of layers (14) of flexible graphite. Accordingly, heat which reaches the outer, second layer (12) results in fewer hot spots than occur with a conventional rigid insulation material, thereby reducing the total amount of insulation material required to achieve a desired level of thermal insulation.Type: ApplicationFiled: October 17, 2002Publication date: April 22, 2004Applicant: UCAR Carbon Company Inc.Inventors: David P. Blain, Robert E. Smith
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Patent number: 6657129Abstract: A device for fixing a ceramic component in a metallic support is provided. The device includes a bush, which is produced from gray cast iron with lamellar graphite, arranged at those locations of the ceramic component where the ceramic component is fixed in the metallic support. Internal oxidation of the gray cast iron with lamellar graphite attaches the ceramic component to the bush.Type: GrantFiled: October 2, 2002Date of Patent: December 2, 2003Assignee: Alstom (Switzerland) LtdInventor: Klaus Friedrich Stärk
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Patent number: 6531011Abstract: A brake unit having a brake disc of ceramic and a hub of a different material, which radially overlap one another with their mutually facing rims and are mechanically joined by a wreath-type rim of mounting bolts that axially penetrate the overlapping rims. The mounting bolts are uniformly included in the transmission of torque. Entrainment bores or slots provided in the brake disc are plastically lined with a metal or plastic sleeve, or the disc material is formed specifically to certain areas in this region as a plastically deformable C/C structure. A method is disclosed for manufacturing a partially ceramized molded article, in particular a brake disc having a C/C structure in the area of the entrainment bores or slots. A completely non-metallic brake unit and a method for its manufacture are also disclosed.Type: GrantFiled: February 26, 2001Date of Patent: March 11, 2003Assignee: Daimler Benz AGInventors: Gerhard Gross, Tillman Haug, Kolja Rebstock, Christian Schwarz
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Publication number: 20020179225Abstract: A process for producing a fiber-reinforced, ceramic structural component comprising high-temperature resistant fibers which are reaction-bonded to a matrix of silicon carbide comprises the steps of coating bundles of fibers with pyrolysable binder and solidifying the binder, producing mixtures of fiber bundles, fillers and binders, pressing the mixtures to produce a pressed body, pyrolysing the pressed body under the exclusion of oxygen to form a porous, carbon-containing preform, infiltrating the preform with a silicon melt to form the silicon carbide matrix, in which various pressing compounds are produced, which contain fibers of different quality and in different proportions and different coatings. These pressing compounds are arranged at different levels and in different spatial directions in the press mould during the filling of the press mould. After the pressing, the regions produced in this way are retained in the press mould.Type: ApplicationFiled: May 30, 2002Publication date: December 5, 2002Inventors: Thomas Behr, Manfred Kurbjuhn, Robert Michal, Michael Niestegge, Karl-Ludwig Weisskopf
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Patent number: 6436221Abstract: A method of CNT field emission current density improvement performed by a taping process is disclosed. The method comprises following steps. First of all, a conductive pattern coated on a substrate by screen-printing a conductive slurry containing silver through a patterned screen is carried out. Thereafter, a CNT layer is attached thereon by screen-printing a CNT paste through a mesh pattern screen to form CNT image pixel array layer. The CNT paste consists of organic bonding agent, resin, silver powder, and carbon nano-tubes. After that the substrate is soft baked by an oven using a temperature of about 50-200° C. to remove volatile organic solvent. A higher temperature sintering process, for example 350-550° C. is then carried out to solidify the CNT on and electric coupled with the conductive pattern.Type: GrantFiled: February 7, 2001Date of Patent: August 20, 2002Assignee: Industrial Technology Research InstituteInventors: Yu-Yang Chang, Jyh-Rong Sheu, Cheng-Chung Lee
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Patent number: 6287500Abstract: A method for manufacturing a brake rotor which includes a disc-shaped carrier and friction rings arranged on or on top of the carrier, so that the friction rings and carrier form a single piece construction. The carrier and friction ring(s) are separately molded into pre-forms, subsequently joined and finished formed in a press tool. The carrier and friction rings are made from carbon/carbon materials and ceramic materials respectively. The carrier has a hat-shaped cross-sectional shape with a flanged outer edge and the friction rings are attached to each side of the flanged edge of the carrier. The brake rotor may be directly mounted onto the wheel flange via the carrier using bolts.Type: GrantFiled: June 15, 2000Date of Patent: September 11, 2001Assignees: DaimlerChrysler AG, SGL Carbon Composites, Inc., HitcoInventors: Dino Militello, Manfred Roessler, Ruediger Lichnofsky, Tilmann Haug, Emil Naeumann, Karl-Heinz Roess, Andreas Soens, Detlef Sokolowsky, Claus-Peter Weidner
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Patent number: 6206992Abstract: A fibrous ceramics fabrication method using a room extrusion process and a fibrous monolithic ceramics fabrication method using thereof is disclosed. The method includes the steps of obtaining a extrusion-purpose slurry by evenly mixing a hydrophilic cellulose bonding agent 3 to 7 and a hydrophilic organic plasticizer 5 to 20 for improving a formation property by softening the cellulose bonding agent with a distilled water 45 to 55, with regard to a weight percent 100 of a ceramic powders selected from a group of silicon nitride, silicon carbide and alumina, carrying out a room temperature extrusion from the extrusion-purpose slurry, and coating the fiber by passing through a mixedly dispersed coating-purpose slurry a ceramic powders 20 to 45 selected from a group of boron nitride and graphite, an organic dispersant 0.Type: GrantFiled: November 4, 1998Date of Patent: March 27, 2001Assignee: Agency for Defense DevelopmentInventors: Yong-Kee Baek, Do-Kyung Kim, Shi-Woo Lee, Jong-Gyu Paik