Silicon Carbide Patents (Class 501/88)
  • Patent number: 10322974
    Abstract: Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Processes and articles utilizing such high purity SiOC and SiC.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: June 18, 2019
    Assignee: Pallidus, Inc.
    Inventors: Mark S. Land, Ashish P. Diwanji, Andrew R. Hopkins, Walter J. Sherwood, Douglas M. Dukes, Glenn Sandgren, Brian L. Benac
  • Patent number: 10094041
    Abstract: A SiC single crystal having high crystallinity and a large diameter is provided. A SiC single crystal comprising a seed crystal with a c-plane and a non-c-plane, and a c-plane growth portion and an enlarged diameter portion that have grown from the c-plane and the non-c-plane of the seed crystal as origins in the direction of the c-plane and the direction of the non-c-plane, wherein a continuous region free of threading dislocations is present in a peripheral portion of a plane that is parallel to the c-plane of the seed crystal, and contains the seed crystal and the enlarged diameter portion, wherein the area of the continuous region occupies 50% or more of the total area of the plane.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: October 9, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Katsunori Danno
  • Patent number: 9994487
    Abstract: Disclosed is a process for producing a RBSiC member that has a large size and a complicated shape and possesses ceramic properties. The process is Selective Laser Sintering process which includes providing a raw material containing silicon carbide particles and a binder, forming a thin layer of the raw material, and sintering the thin layer by irradiating a desired area in the thin layer with laser to form a sintered thin layer, repeating the step of forming the sintered thin layer to obtain a green body, impregnating the green body with a carbon source and curing the green body impregnated with the carbon source to give a cured body, carbonizing an organic compound component in the cured body to give a fired body, and infiltrating the fired body with silicon and subjecting the fired body to reaction sintering to give a RBSiC member, wherein the fired body contains 8% to 30% by weight of carbon.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: June 12, 2018
    Assignee: Toto Ltd.
    Inventors: Takayuki Ide, Masami Ando, Takero Tokizono
  • Patent number: 9708224
    Abstract: The invention proposed a novel hot pressing flowing sintering method to fabricate textured ceramics. The perfectly 2-dimensional textured Si3N4 ceramics (Lotgering orientation factor fL 0.9975) were fabricated by this method. During the initial sintering stage, the specimen flowed along the plane which is perpendicular to the hot pressing direction under pressure, through the controlling of the graphite die movement. The rod-like ?-Si3N4 nuclei was easily to texture during the flowing process, due to the small size of the ?-Si3N4 nuclei and the high porosity of the flowing specimen. After aligned, the ?-Si3N4 grains grew along the materials flowing direction with little constraint. textured Si3N4 ceramics fabricated by this invention also showed high aspect ratio. Compared to the conventional hot-forging technique which contained the sintering and forging processes, hot pressing flowing sintering proposed is simpler and lower cost to fabricate textured Si3N4.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: July 18, 2017
    Assignees: DONGGUAN SOUTH CHINA DESIGN AND INNOVATION INST., GUANGDONG UNIVERSITY OF TECHNOLOGY
    Inventors: Shanghua Wu, Qiangguo Jiang, Weiming Guo, Shangxian Gu, Maopeng Zhou, Wei Liu, Lixia Cheng, Bo Wang, Chengyong Wang, Qimin Wang
  • Patent number: 9612215
    Abstract: The invention provides a susceptor capable of obtaining high-quality SiC semiconductor crystals by keeping the Si concentration and C concentration around a wafer constant and by preventing the generation of particles. A susceptor of graphite covered with silicon carbide is characterized in that at least one section of a part on which a wafer is placed is tantalum carbide or a graphite material covered with tantalum carbide. The part on which the wafer is placed may be a detachable member. A material around the part on which the wafer is placed may be a detachable graphite material covered with silicon carbide.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: April 4, 2017
    Assignee: TOYO TANSO CO., LTD.
    Inventors: Ichiro Fujita, Hirokazu Fujiwara
  • Patent number: 9546114
    Abstract: A silicon carbide based material exhibiting high strength, good thermal shock resistance, high resistance to abrasion and being chemically stable to harsh environmental conditions is described. The carbide Ball Hill ceramic comprises a ?-SiAlON bonding phase in which sintering is facilitated by at least one rare earth oxide sintering agents incorporated within the Vibrating Sieve batch admixture as starting materials. The residual rare earth sintering aid being chosen so as to impart good mechanical and refractory properties.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: January 17, 2017
    Assignee: Xeracarb Limited
    Inventors: Anthony Norris Pick, Hywel Jones
  • Patent number: 9540283
    Abstract: A method of forming a ceramic body including forming a mixture made of at least a first powder material (PM1) including carbon having a first average particle size (PS1), a second powder material (PM2) including carbon and different than the first powder material, the second powder material having a second average particle size (PS2) less than the first average particle size (PS1), and an aluminum content (AC2) greater than the aluminum content (AC1) of the first powder material, and further including forming a green body from the mixture, and sintering the green body and forming a ceramic body having a first type of grain having an average grain size of not greater than about 8 times the first average particle size (PS1).
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: January 10, 2017
    Assignee: SAINT-GOBAIN CERAMICS & PLASTICS, INC.
    Inventors: Nikolas J. Ninos, Diana R. Tierney
  • Patent number: 9464668
    Abstract: A bearing system having a bearing pair made up of at least one bearing and at least one running partner, wherein a coating which is made up of a layer of which the main constituent is amorphous SiO2 is applied to at least one running surface of the bearing pair.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: October 11, 2016
    Assignee: WIELAND-WERKE AG
    Inventors: Gerhard Thumm, Till Merkel, Volker Voggeser, Christian Lehnert
  • Patent number: 9388509
    Abstract: In a method of forming polycrystalline SiC grain material, low-density, gas-permeable and vapor-permeable bulk carbon is positioned at a first location inside of a graphite crucible and a mixture of elemental silicon and elemental carbon is positioned at a second location inside of the graphite crucible. Thereafter, the mixture and the bulk carbon are heated to a first temperature below the melting point of the elemental Si to remove adsorbed gas, moisture and/or volatiles from the mixture and the bulk carbon. Next, the mixture and the bulk carbon are heated to a second temperature that causes the elemental Si and the elemental C to react forming as-synthesized SiC inside of the crucible. The as-synthesized SiC and the bulk carbon are then heated in a way to cause the as-synthesized SiC to sublime and produce vapors that migrate into, condense on and react with the bulk carbon forming polycrystalline SiC material.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: July 12, 2016
    Assignee: II-VI Incorporated
    Inventors: Ilya Zwieback, Avinash K. Gupta, Ping Wu, Donovan L. Barrett, Gary E. Ruland, Thomas E. Anderson
  • Patent number: 9388084
    Abstract: Sintered product exhibiting a relative density of greater than 97% and composed of: more than 92% by weight of silicon carbide, between 0.5% and 8% by weight of an amorphous secondary phase comprising the elements O, Si and one or two elements chosen from Al and Y, less than 2% of other elements, present in said product in the form of an additional phase or of unavoidable impurities, in which the silicon carbide is present in the form of crystalline grains and in which said secondary phase is amorphous and located essentially at the boundaries of the silicon carbide grains.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: July 12, 2016
    Assignees: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Gilles Rossiquet, Eric Jorge
  • Patent number: 9328620
    Abstract: A method for making a gas turbine engine matrix composite structure. The method includes providing at least one metal core element, fabricating a matrix composite component about the metal core element, and removing at least part of the metal core element from the matrix composite component by introduction of a halogen gas.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: May 3, 2016
    Assignee: Rolls-Royce Corporation
    Inventors: Andrew Joseph Lazur, Adam Lee Chamberlain
  • Patent number: 9006121
    Abstract: A pipe choke for use in drilling and mining operations comprising a body including a first end and a second end configured to couple to a pipe, an opening extending through the body from the first end to the second end, and wherein the body includes a first phase comprising recrystallized silicon carbide and a second phase comprising silicon.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: April 14, 2015
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Christopher J. Reilly, Edmund A. Cortellini, Robin M. Harrington
  • Publication number: 20150087496
    Abstract: The invention relates to a refractory ceramic batch and to a refractory ceramic brick produced therefrom.
    Type: Application
    Filed: May 7, 2013
    Publication date: March 26, 2015
    Inventors: Harald Harmuth, Sabine Gschiel
  • Patent number: 8956482
    Abstract: A ceramics composite member includes a structure in which a first ceramic member and a second ceramic member are integrated with a joint portion. The joint portion has a texture in which a silicon phase having an average diameter of 0.05 ?m or more and 10 ?m or less is continuously provided in a network form in interstices of silicon carbide particles having an average particle diameter of 0.1 ?m or more and 0.1 mm or less.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: February 17, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shoko Suyama, Yoshiyasu Ito, Shigeki Maruyama, Norihiko Handa
  • Patent number: 8951638
    Abstract: A silicon carbide powder for the production of a silicon carbide single crystal has an average particle diameter of 100 ?m or more and 700 ?m or less and a specific surface area of 0.05 m2/g or more and 0.30 m2/g or less. A method for producing a silicon carbide powder for the production of the silicon carbide single crystal including sintering a silicon carbide powder having an average particle diameter of 20 ?m or less under pressure of 70 MPa or less at a temperature of 1900° C. or more and 2400° C. or less and in a non-oxidizing atmosphere, thereby obtaining a sintered body having a density of 1.29 g/cm3 or more; adjusting particle size by means of pulverization of the sintered body; and removing impurities by means of an acid treatment.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: February 10, 2015
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, National Institute of Advanced Industrial Science and Technology
    Inventors: Tomohisa Katou, Yusuke Takeda, Hiroshi Murata
  • Patent number: 8927447
    Abstract: A ceramic sintered body includes tungsten carbide, zirconia, and alumina. The content of the tungsten carbide is 20 to 50 vol %, and the content of the zirconia is 5 to 25 vol %. The crystal phase of the zirconia is a tetragonal crystal or a mixture of tetragonal and monoclinic crystals. The ceramic sintered body does not substantially include Ti compounds. The average particle diameter of the tungsten carbide, the average particle diameter of the zirconia, and the average particle diameter of the alumina are all 1 ?m or less.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: January 6, 2015
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Jun Moteki, Yusuke Katsu, Takeshi Mitsuoka
  • Publication number: 20140349832
    Abstract: Ceramic nanocomposites and methods for manufacturing the ceramic nanocomposites are disclosed. One method includes introducing to a fired green ceramic body having a ceramic matrix submicron particles having coefficient of thermal expansion lower than the coefficient of thermal expansion of the ceramic matrix and at least one type of location-controlling dopant at an amount that is sufficient to cover the majority of the ceramic matrix grain boundaries. One ceramic nanocomposite includes a ceramic matrix with submicron particles dispersed in the ceramic matrix, the submicron particles having a coefficient of thermal expansion lower than the coefficient of thermal expansion of the ceramic matrix and at least one dopant that covers the majority of the ceramic matrix grain boundaries, at a concentration that does not exceed the bulk solubility limit of the dopant in the ceramic matrix at the ceramic nanocomposite sintering temperature.
    Type: Application
    Filed: August 11, 2014
    Publication date: November 27, 2014
    Inventors: Wayne David KAPLAN, Gali Gluzer, Moshe Katz, Gil Perlberg
  • Publication number: 20140329663
    Abstract: A composition having nanoparticles of silicon carbide and a carbonaceous matrix or silicon matrix. The composition is not in the form of a powder. A composition having silicon and 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 silicon and the organic compound and heating to form silicon carbide or silicon nitride nanoparticles.
    Type: Application
    Filed: May 19, 2014
    Publication date: November 6, 2014
    Applicant: The Govenment of the United States of America, as represented by the Secretary of the Navy
    Inventors: Teddy M. Keller, Andrew Saab, Matthew Laskoski
  • Patent number: 8865607
    Abstract: A composite article including a body made of recrystallized silicon carbide and an infiltrant, wherein the body comprises a static impact resistance of at least about 1800 MPa.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: October 21, 2014
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Christopher J. Reilly, Edmund A. Cortellini, Robin M. Harrington
  • Patent number: 8859075
    Abstract: A silicon carbide ceramic is provided which has a small amount of resistivity change due to changes in temperature and which is capable of generating heat by current application. The silicon carbide ceramic contains silicon carbide crystals having 0.1 to 25 mass % of 4H—SiC silicon carbide crystals and 50 to 99.9 mass % of 6H—SiC silicon carbide crystals, preferably having a nitrogen content of 0.01 mass % or less, more preferably containing two or more kinds of silicon carbide particles containing silicon carbide crystals and silicon for binding the silicon carbide particles to each other and having a silicon content of from 10 to 40 mass %.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 14, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Atsushi Kaneda, Takayuki Inoue, Tsuyoshi Watanabe
  • Publication number: 20140287907
    Abstract: This disclosure concerns a method of making silicon carbide involving adding agricultural husk material to a container, creating a vacuum or an inert atmosphere inside the container, applying conventional heating or microwave heating, heating rapidly, and reacting the material and forming silicon carbide (SiC).
    Type: Application
    Filed: June 9, 2014
    Publication date: September 25, 2014
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Syed B. Qadri, Arne W. Fliflet, M. Ashraf Imam, Bhakta B. Rath, Edward P. Gorzkowski, III
  • Patent number: 8828534
    Abstract: The method comprises: using chemical vapor infiltration to form a first continuous interphase on the fibers of a fiber structure made of refractory fibers, the interphase having a thickness of no more than 100 nanometers; impregnating the fiber structure with a consolidation composition comprising a carbon or ceramic precursor resin; forming a fiber preform that is consolidated by shaping the impregnated fiber structure and using pyrolysis to transform the resin into a discontinuous solid residue of carbon or ceramic; using chemical vapor infiltration to form a second continuous interphase layer; and densifying the preform with a refractory matrix. This preserves the capacity of the fiber structure to deform so as to enable a fiber preform to be obtained that is of complex shape, while nevertheless guaranteeing the presence of a continuous interphase between the fibers and the matrix.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: September 9, 2014
    Assignee: Herakles
    Inventors: Eric Philippe, Eric Bouillon
  • Publication number: 20140206525
    Abstract: There is provided a method for the fabrication of porous SiC ceramic. The method comprises oxidizing particles of SiC ceramic thereby forming amorphous silica on the surface of the particles. The oxidized SiC particles are then mixed with an additive. Alternatively, layer(s) of the additive is (are) deposited on their surface by sol-gel technique. The oxidized SiC particles mixed or coated with the additive are then mixed with at least one pore-former. Alternatively, the oxidized SiC particles mixed or coated with the additive are coated with layer(s) of a polymer or pore-former by in-situ polymerization. In embodiments where the oxidized SiC particles are mixed with an additive and a pore-former or polymer, a further additive may be used. In each of these embodiments, the resulting product is then compacted into a green body which is heated and sintered to yield the porous SiC ceramic material. There is also provided a porous SiC ceramic fabricated by the method according to the invention.
    Type: Application
    Filed: August 24, 2012
    Publication date: July 24, 2014
    Applicant: POLYVALOR, LIMITED PARTNERSHIP
    Inventors: Jamal Chaouki, Omid Ebrahimpour, Charles Dubois
  • Patent number: 8697024
    Abstract: A precursor formulation of a silicon carbide material that includes a ceramic material and a boron-11 compound. The ceramic material may include silicon and carbon and, optionally, oxygen, nitrogen, titanium, zirconium, aluminum, or mixtures thereof. The boron-11 compound may be a boron-11 isotope of boron oxide, boron hydride, boron hydroxide, boron carbide, boron nitride, boron trichloride, boron trifluoride, boron metal, or mixtures thereof. A material for use in a nuclear reactor component is also disclosed, as are such components, as well as a method of producing the material.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: April 15, 2014
    Assignee: COI Ceramics, Inc.
    Inventors: Timothy E. Easler, Andrew Szweda, Eric Stein
  • Patent number: 8604149
    Abstract: The invention relates to a method for producing a polysilane-polycarbosilane copolymer solution. Said method comprises the preparation of a polysilane, obtained by the disproportionation of a methylchlorodisilane or a mixture of methylchlorodisilanes of formula Si2MenC16-n with a Lewis base as the catalyst, a subsequent thermal cross-linking of the polysilane to form an infusible polysilane-polycarbosilane copolymer that is soluble in inert solvents, in addition to the production of said solution by the dissolution of the polysilane-polycarbosilane copolymer in an inert solvent. The invention also relates to a method for producing oxygen-depleted ceramic fibers and other molded bodies with a composition similar to that of SiC. Said method comprises the spinning of the solution to obtain green fibers according to the dry spinning method and the pyrolysis of the dried green fibers in an inert gas atmosphere or a reductive atmosphere.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: December 10, 2013
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Juergen Clade, Erich Seider, Dieter Sporn, Erika Brendler, Thomas Lange, Gerhard Roewer, Dorit Mainhold
  • Publication number: 20130301151
    Abstract: Substrates suitable for mirrors used at wavelengths in the EUV wavelength range have substrates (1) including a base body (2) made of a precipitation-hardened alloy, of an intermetallic phase of an alloy system, of a particulate composite or of an alloy having a composition which, in the phase diagram of the corresponding alloy system, lies in a region which is bounded by phase stability lines. Preferably, the base body (2) is made of a precipitation-hardened copper or aluminum alloy. A highly reflective layer (6) is preferably provided on a polishing layer (3) of the substrate (1) of the EUV mirror (5).
    Type: Application
    Filed: July 19, 2013
    Publication date: November 14, 2013
    Inventors: Claudia EKSTEIN, Holger MALTOR
  • Publication number: 20130288880
    Abstract: A SiC ceramic material includes a bundle of SiC continuous fibers in a porous SiC ceramic matrix, has thermal insulation properties, a high level of strength and a high degree of toughness. A SiC ceramic structure is made of the SiC ceramic material. It is produced by preparing a pressure-sintered compact using a slurry prepared by mixing SiC powder and carbon powder in a liquid and by gasifying and releasing the carbon powder. The SiC ceramic structure can be produced by heating a reaction preparation containing a bundle of SiC continuous fibers and Si powder to a temperature equal to or higher than the melting point of silicon causing a reaction of the carbon component and Si powder and thereby obtaining a reaction-sintered compact, and by gasifying and releasing the carbon component from the reaction-sintered compact. The SiC ceramic can be produced by a chemical vapor deposition method.
    Type: Application
    Filed: November 10, 2011
    Publication date: October 31, 2013
    Applicant: KYOTO UNIVERSITY
    Inventors: Tatsuya Hinoki, Yi-Hyun Park
  • Publication number: 20130216768
    Abstract: Provided is a silicon carbide ceramic having a small amount of resistivity change due to temperature change and being capable of generating heat by current application; and containing silicon carbide crystals having 0.1 to 25 mass % of 4H—SiC silicon carbide crystals and 50 to 99.9 mass % of 6H—SiC silicon carbide crystals, preferably having a nitrogen content of 0.01 mass % or less, more preferably containing two or more kinds of silicon carbide particles containing silicon carbide crystals and silicon for binding these silicon carbide particles to each other and having a silicon content of from 10 to 40 mass %.
    Type: Application
    Filed: March 27, 2013
    Publication date: August 22, 2013
    Applicant: NGK INSULATORS, LTD.
    Inventor: NGK INSULATORS, LTD.
  • Publication number: 20130209777
    Abstract: A ceramics sliding member for use in ultrapure water or pure water of the present invention is made of a non-continuous-pore SiC sintered body. The non-continuous-pore SiC sintered body includes ?-SiC at a ratio of 20% by weight or more thereto and has an average crystal structure whose aspect ratio is 2 or greater.
    Type: Application
    Filed: September 11, 2012
    Publication date: August 15, 2013
    Applicants: NIPPON PILLAR PACKING CO., LTD., EBARA CORPORATION
    Inventors: Hiroshi Nagasaka, Hiroshi Yokota, Junya Kawabata, Hideki Kanno, Kenichi Hoshino, Satoshi Fujiwara, Eiji Okumachi
  • Publication number: 20130196844
    Abstract: A composition having nanoparticles of silicon carbide and a carbonaceous matrix or silicon matrix. The composition is not in the form of a powder. A composition having silicon and 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 silicon and the organic compound and heating to form silicon carbide or silicon nitride nanoparticles.
    Type: Application
    Filed: March 11, 2013
    Publication date: August 1, 2013
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Teddy M. Keller, Andrew Saab, Matthew Laskoski, Syed B. Qadri
  • Publication number: 20130184141
    Abstract: To obtain a ceramic fiber-reinforced composite material, by melt-infiltrating a composite material substrate obtained by forming ceramic fibers into a composite with a matrix formed of an inorganic substance, with an alloy having a composition that is constituted by a disilicate of at least one or more transition metal among transition metals that belong to Group 3A, Group 4A or Group 5A of the Periodic Table and silicon as the remainder, and having the silicon content ratio of 66.7 at % or more.
    Type: Application
    Filed: January 16, 2013
    Publication date: July 18, 2013
    Applicant: JAPAN AEROSPACE EXPLORATION AGENCY
    Inventor: JAPAN AEROSPACE EXPLORATION AGENCY
  • Publication number: 20130168079
    Abstract: A pipe choke for use in drilling and mining operations comprising a body including a first end and a second end configured to couple to a pipe, an opening extending through the body from the first end to the second end, and wherein the body includes a first phase comprising recrystallized silicon carbide and a second phase comprising silicon.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 4, 2013
    Inventors: Christopher J. Reilly, Edmund A. Cortellini, Robin M. Harrington
  • Patent number: 8475907
    Abstract: There is provided a silicon carbide-based porous body which can avoid excessive temperature elevation when it is used as a filter and the captured particulate matter (PM) is burnt for removal and which is low in strength reduction caused by heat cycle. The silicon carbide-based porous body comprises a plurality of silicon carbide (SiC) particles as an aggregate and a plurality of binding phases which bind the silicon carbide particles to each other, wherein of the binding phases, the phase having the largest volume is either of a Si phase and a phase (a metal silicide phase) made of at least one member selected from the group consisting of a Ti silicide, a Zr silicide, a Mo silicide and a W silicide, all having a linear thermal expansion coefficient at 40 to 800° C., higher than that of Si by at least 3×10?6 (° C.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: July 2, 2013
    Assignee: NGK Insulators, Ltd.
    Inventor: Masaaki Kawai
  • Patent number: 8475906
    Abstract: A silicon carbide based porous material, which contains a metal silicide in an amount of 1 to 30% by mass and having a porosity of 38 to 80%, is provided.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: July 2, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takahiro Tomita, Kenji Morimoto
  • Patent number: 8466076
    Abstract: The present invention pertains to a process for producing unmeltable polysilane-polycarbosilane copolymers which are soluble in inert solvents, comprising the steps providing the product of a disproportionation of a methylchlorodisilane or a mixture of several methylchlorodisilanes of the composition Si2MenCl6-n, wherein n=1?4, wherein the disproportionation was carried out with a Lewis base as a catalyst, wherein this product is a chlorine-containing, crude polysilane/oligosilane containing hydrocarbon groups, and thermally postcrosslinking the crude polysilane/oligosilane to a polysilane-polycarbosilane copolymer, characterized in that the chlorine content of the polysilane-polycarbosilane copolymer is lowered by reacting the crude polysilane/oligosilane with a substitution agent, by which chlorine bound therein is replaced with a chlorine-free substituent. Green fibers and low-oxygen/oxygen-free ceramic fibers with a very low chlorine content can be produced using this process.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: June 18, 2013
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Arne Ruedinger, Juergen Clade, Heiko Spaniol, Dieter Sporn
  • Publication number: 20130059720
    Abstract: A silicon carbide fiber dispersion-reinforced composite refractory molding includes an aggregate part and a bonding part which are obtained by compounding an plastic refractory composition containing at least SiC, with SiC fiber chops, in an amount of 0.1 to 3% by weight based on the plastic refractory composition, wherein fiber bundles each including a plurality of SiC inorganic fibers containing 50% or more SiC in their main component and having a length of 10 mm to 100 mm and a fiber diameter of 5 ?m to 25 ?m were bundled via an organic binder, kneading the mixture with water and then drying and solidifying it, wherein monofilaments including SiC inorganic fibers containing 50% or more SiC, having a fiber diameter of 5 ?m to 25 ?m, a fiber length of 50 ?m to 2,000 ?m and an aspect ratio of 5 to 200 are dispersed in the bonding part.
    Type: Application
    Filed: April 27, 2012
    Publication date: March 7, 2013
    Applicant: ARIAKE CERAMIC CONSTRUCTIONS CO., LTD.
    Inventors: Shigeru FUKUMARU, Hiroshi ICHIKAWA
  • Patent number: 8366071
    Abstract: Provided is a sliding member which includes a plurality of open pores in a sliding surface, which each comprises one or more opening portions having a circularity of 0.24 or more and a circle equivalent diameter of 10 ?m to 150 ?m. A ratio of the number of open pores having the overlapping degree of 10% or more between the opening portions is 3% or less. Another sliding member includes a plurality of open pores in a sliding surface, which each comprises one or more opening portions having a circularity of 0.24 or more and a circle equivalent diameter of not less than 10 ?m nor more than 78 ?m. A coefficient of variation of the opening portions satisfies the following equation: 1.03??V/X?1.51 where ?V is a standard deviation of circle equivalent diameters, and X is an average value of the circle equivalent diameters. A mechanical seal ring, a mechanical seal and a faucet valve each using the sliding member are also provided.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: February 5, 2013
    Assignee: Kyocera Corporation
    Inventors: Mieko Yashima, Yuusaku Ishimine
  • Publication number: 20130008748
    Abstract: A friction disc (2) with an anti-abrasion layer (1) and integrated wear indication, the friction disc (2) having a friction surface (2?) which is completely covered by the anti-abrasion layer (1). At least one indication surface element (3) which occupies a part of the friction surface (2?) and differs from at least one of the components friction surface (2?) and anti-abrasion layer (1) of the friction disc (2) in at least one of the features coloring and texture is provided between the anti-abrasion layer (1) and the friction disc (2). Compositions of the anti-abrasion layer (1) of the friction disc (2).
    Type: Application
    Filed: March 16, 2011
    Publication date: January 10, 2013
    Applicant: DAIMLER AG
    Inventors: Oliver Lembach, Ralph Mayer
  • Patent number: 8349231
    Abstract: This invention relates to a process for the production of a shaped composite material and the material obtained through that process. In particular it relates to a process for obtaining a disk of composite ceramic material for disc brakes in which the friction coefficient is varied by varying the composition of the surface layer.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: January 8, 2013
    Assignee: Brembo Ceramic Brake Systems S.p.A.
    Inventors: Ralf Siegfried Goller, Marco Orlandi, Riccardo Piavani
  • Publication number: 20120295784
    Abstract: A ceramic article comprises ceramic fibers having an aspect ratio of greater than 3:1 and ceramic particles. The ceramic fibers are substantially randomly oriented in three dimensions in the ceramic article. A method of forming the ceramic article includes the step of providing a composition including ceramic fibers having an aspect ratio of greater than 3:1 and ceramic particles. The composition is extruded through a multi-screw extruder having at least three intermeshing screws to form an extrudate. The extrudate is heated to form the ceramic article.
    Type: Application
    Filed: April 10, 2012
    Publication date: November 22, 2012
    Inventors: Thomas W. McCullough, James E. Schuetz, Thomas D. Wood
  • Publication number: 20120277087
    Abstract: Composite bodies made by a silicon metal infiltration process that feature a silicon intermetallic, e.g., a metal silicide. Not only does this give the composite material engineer greater flexibility in designing or tailoring the physical properties of the resulting composite material, but the infiltrant also can be engineered compositionally to have much diminished amounts of expansion upon solidification, thereby enhancing net-shape-making capabilities. These and other consequences of engineering the metal component of composite bodies made by silicon infiltration permit the fabrication of large structures of complex shape.
    Type: Application
    Filed: March 14, 2012
    Publication date: November 1, 2012
    Inventors: Michael K. Aghajanian, Allyn L. McCormick, Michael S. Epperly
  • Publication number: 20120276324
    Abstract: The present invention relates to specific additives comprising cellulose ether for improving the extrudability of ceramic masses and other masses which set as a result of baking or sintering, a corresponding extrusion process, the extrudates and their use.
    Type: Application
    Filed: November 27, 2007
    Publication date: November 1, 2012
    Inventor: Roland Bayer
  • Patent number: 8293667
    Abstract: It is an object of the invention to provide a ceramic sintered body that has a dense structure and minimal cracking and that exhibits excellent sliding properties even in a non-lubricated state, as well as a process for its production and sliding parts that employ the same. According to a preferred mode, the sintered body of the invention comprises silicon carbide as the parent material and further contains a solid lubricant A with a mean particle size of no greater than 5 ?m and a solid lubricant B with a mean particle size of 10-70 ?m.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: October 23, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Kazuyuki Akasaka, Kiyoshi Kawai
  • Patent number: 8282878
    Abstract: Embodiments of the present invention disclosed herein include a sintering aid composition that has a material useful for sintering, an amine, and optionally a carboxylic acid.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: October 9, 2012
    Assignee: Huntsman Petrochemical LLC
    Inventors: Alan P. Croft, David C. Lewis
  • Patent number: 8278011
    Abstract: The present invention relates to SiC nanostructures, including SiC nanopowder, SiC nanowires, and composites of SiC nanopowder and nanowires, which can be used as catalyst supports in membrane electrode assemblies and in fuel cells. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: October 2, 2012
    Assignee: Nanosys, Inc.
    Inventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan
  • Patent number: 8262981
    Abstract: A method for producing a ceramic material product. A filler material is provided. The filler material is divided into filler granules collectively having a median diameter approximately 10 microns or less. An amount of carbon is provided. The carbon is divided into carbon particles and the carbon particles are allowed to coat the filler granules. The mixture of carbon-coated filler granules is formed into a selected shape. The formed mixture is placed in a substantial vacuum. The mixture is introduced to a pre-selected amount of silicon and the mixture of carbon-coated filler granules and silicon is heated to a temperature at or above the melting point of the silicon.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: September 11, 2012
    Assignee: Schott Corporation
    Inventors: John Carberry, Jennifer Norwood, Katherine T. Leighton, Kyle Hoff, Carl Cline, Edgar L. Aleshire
  • Patent number: 8222171
    Abstract: A method for the production of a ceramic substrate for a semiconductor component, includes the steps of producing paper containing at least cellulose fibers, as well as a filler to be carbonized and/or SiC, pyrolizing the produced paper, and siliconizing the pyrolyzed paper.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: July 17, 2012
    Assignee: Schunk Kohlenstofftechnik GmbH
    Inventors: Marco Ebert, Martin Henrich, Andreas Lauer, Gotthard Nauditt, Thorsten Scheibel, Roland Weiss
  • Publication number: 20120165179
    Abstract: A composite article including a body made of recrystallized silicon carbide and an infiltrant, wherein the body comprises a static impact resistance of at least about 1800 MPa.
    Type: Application
    Filed: November 21, 2011
    Publication date: June 28, 2012
    Applicant: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Christopher J. Reilly, Edmund A. Cortellini, Robin M. Harrington
  • Patent number: 8182603
    Abstract: Disclosed are cement compositions for applying to honeycomb bodies. The cement compositions can be applied as a plugging cement composition, segment cement, or even as after applied artificial skins or coatings. The cement compositions generally include an inorganic powder batch mixture consisting essentially of inorganic particles having a particle size greater than 100 nm. The cement compositions can further include an organic binder, a liquid vehicle, and one or more optional processing aids. Also disclosed are honeycomb bodies having the disclosed cement compositions applied thereto and methods for making same.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: May 22, 2012
    Assignee: Corning Incorporated
    Inventors: Anthony Joseph Cecce, Thomas James Deneka, Kintu Odinga X Early, Jeffrey Donald Roche, Patrick David Tepesch
  • Patent number: 8137610
    Abstract: Disclosed is a molding compound for producing a fireproof lining, especially for a combustion chamber of a stationary gas turbine. The molding compound is characterized particularly by the fact that the molding compound is formed from more than about 50 percent by weight of silicon carbide and less than about 50 percent by weight of aluminum silicate.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: March 20, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Holger Grote, Margarete Herz, Wolfgang Kollenberg, Christine Rasch, Marc Tertilt