And Carbonaceous Material Patents (Class 501/90)
  • Patent number: 10508056
    Abstract: Disclosed herein are methods of forming substantially crystalline, dense silicon carbide fibers from infusible polysilazane fibers by utilizing a single stage pyrolysis. The pyrolysis is performed using a continuous process in a single furnace with a constant atmospheric condition. Also disclosed are substantially crystalline, dense silicon carbide fibers formed by these methods.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: December 17, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Anthony Yu-Chung Ku, Gary C. Buczkowski, Ryan Christopher Mills, Peter Kennedy Davis
  • Patent number: 9751807
    Abstract: Systems, methods and devices adapted to ease manufacture of composite articles (e.g., ceramic composite articles), particularly composite articles which include a hollow feature are disclosed. In one embodiment, a system includes: a consumable core formed to be disposed within an inner portion of a composite precursor, the consumable core adapted to convert into an infiltrant during a manufacturing process and infiltrate the composite precursor.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: September 5, 2017
    Assignee: General Electric Company
    Inventors: Glenn Curtis Taxacher, Peter de Diego, Paul Edward Gray, Philip Harold Monaghan
  • Patent number: 9362576
    Abstract: In one embodiment, an electrical power storage system using hydrogen includes a power generation unit generating power using hydrogen and oxidant gas and an electrolysis unit electrolyzing steam. The electrical power storage system includes a hydrogen storage unit storing hydrogen generated by the electrolysis and supplying the hydrogen to the power generation unit during power generation, a high-temperature heat storage unit storing high temperature heat generated accompanying the power generation and supplying the heat to the electrolysis unit during the electrolysis, and a low-temperature heat storage unit storing low-temperature heat, which is exchanged in the high-temperature heat storage unit and generating with this heat the steam supplied to the electrolysis unit.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: June 7, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shoko Suyama, Yoshiyasu Ito, Shigeo Kasai, Yasuo Takagi, Tsuneji Kameda, Kentaro Matsunaga, Masato Yoshino, Daisuke Horikawa, Kazuya Yamada
  • Patent number: 9353013
    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: Grant
    Filed: November 10, 2011
    Date of Patent: May 31, 2016
    Assignee: KYOTO UNIVERSITY
    Inventors: Tatsuya Hinoki, Yi-Hyun Park
  • Patent number: 9085493
    Abstract: Produced is a silicon carbide-coated carbon base material in which a silicon carbide coating is densely and uniformly formed on the surface of a carbon base material, such as graphite. A production process includes the steps of: preparing a carbon base material the surface of which has basal plane sites of an SP2 carbon structure with no dangling bond and edge plane sites of an SP2 carbon structure with a dangling bond; and reacting the surface of the carbon base material with SiO gas in an atmosphere at a temperature of 1400° C. to 1600° C. and a pressure of 1 to 150 Pa to form silicon carbide, whereby the carbon base material coated with silicon carbide is produced.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: July 21, 2015
    Assignee: Toyo Tanso Co., Ltd.
    Inventors: Masaharu Nakamura, Yoshinari Miyamoto, Tetsuro Tojo
  • Publication number: 20150141235
    Abstract: A method of fabricating a carbon fiber-reinforced article includes providing carbon fibers that have surfaces that include an initial interfacial bonding strength capacity with respect to bonding with boron nitride. The surfaces are then modified to reduce the initial interfacial bonding strength capacity. A layer of boron nitride is then deposited on the modified surfaces and the carbon fibers are then embedded in a ceramic matrix. A carbon fiber-reinforced article includes the carbon fibers, the layer of boron nitride on the surfaces of the carbon fibers, and the ceramic matrix. The article exhibits non-brittle fracture.
    Type: Application
    Filed: December 28, 2012
    Publication date: May 21, 2015
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Michael A. Kmetz, Sam Frueh
  • 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
  • Patent number: 8962504
    Abstract: The disclosure provides novel graphene-reinforced ceramic composites and methods for making such composite materials.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: February 24, 2015
    Assignee: Arizona Board of Regents on Behalf of The University of Arizona
    Inventors: Erica L. Corral, Luke S. Walker, Victoria R. Marotto, Mohammad A. Rafiee, Nikhil Koratkar
  • 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
  • Publication number: 20150005151
    Abstract: There are provided a carbon fiber composite material having higher strength than conventional carbon fiber composite materials, and a brake member, a structural member for semiconductor, a heat resistant panel and a heat sink, all of which use this carbon fiber composite material. The carbon fiber composite material is obtained by mixing carbon fiber with a resin, subsequently molding the mixture and carbonizing the molded product, and subjecting the resultant carbonized product to melt impregnation with silicon, in which the lattice spacing d002 of the carbon (002) plane of the carbon fiber as measured by an X-ray diffraction method is 3.36 to 3.43. A brake member, a structural member for semiconductor, a heat resistant panel and a heat sink, all of which use this carbon fiber composite material, are provided. The carbon fiber is preferably a carbon fiber obtained by calcining a pitch-derived precursor.
    Type: Application
    Filed: February 18, 2011
    Publication date: January 1, 2015
    Inventors: Kazuya BABA, Kazuyuki Akasaka
  • Patent number: 8916488
    Abstract: A sliding member having a sliding surface comprising a silicon carbide sintered body having a primary phase comprising mainly silicon carbide, and a subphase having a different composition from the primary phase and containing at least boron, silicon and carbon. The ratio of pores having a roundness of 6 ?m or less and a pore diameter of 10 to 60 ?m with respect to all pores having a pore diameter of 10 ?m or more in the sliding surface is 60% or more. This enables retention of good seal properties even in a long-term continuous use. The subphase in the silicon carbide sintered body is preferably granular crystal phases dotted among a plurality of the primary phases. This provides excellent lubricating liquid holding performance as well as excellent thermal conductivity and excellent thermal shock resistance properties.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: December 23, 2014
    Assignee: Kyocera Corporation
    Inventors: Yuusaku Ishimine, Kazuaki Takigawa
  • Publication number: 20140339718
    Abstract: Silicon carbide composite materials contain CSiC with a density of 2.95 to 3.05 g/cm?3 and a fiber bundle content of 2 to 10 wt. %. The fiber bundles have a length of 6 to 20 mm, a width of 0.2 to 3 mm, and a thickness of 0.1 to 0.8 mm. The fiber bundles are filled with a cured phenolic resin content of up to 45 wt. %, and the protected fiber bundles are integrated into an SiC matrix. A method produces the silicon carbide composite materials.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 20, 2014
    Inventors: TANJA DAMJANOVIC, ANDREAS KIENZLE, INGRID KRAETSCHMER
  • 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: 8828540
    Abstract: A process for manufacturing an article includes the steps of applying a quantity of a refractory metal sufficient to produce a coating on a carbon based felt; processing thermally a refractory metal coated carbon based felt at a temperature and for a period of time sufficient to form a ceramic based felt; and cooling the ceramic based felt under a controlled atmosphere.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: September 9, 2014
    Assignee: United Technologies Corporation
    Inventors: Wayde R. Schmidt, Robert A. Barth
  • Patent number: 8748009
    Abstract: The present invention relates to a material including a matrix and at least one reinforcing element introduced therein, wherein the matrix is selected from the group consisting of plastic, carbon, ceramic, glass, clay, metal, and combinations thereof, and the reinforcing element is spherical to ellipsoidal in shape and has an onionskin-like structure. The present invention further relates to a method for producing a material including steps preparing at least one spherical to ellipsoidal reinforcing element having an onionskin-type structure, and introducing the reinforcing element into a matrix, wherein the matrix is selected from the group consisting of plastic, carbon, ceramic, glass, clay, metal, and combinations thereof. The present invention further relates to use of the material in a friction application, as abrasion protection, an injection molding part, a support plate, catalyst substrate or as bone replacement material.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: June 10, 2014
    Assignee: SGL Carbon SE
    Inventors: Wilhelm Frohs, Andreas Kienzle, Ingrid Krätschmer
  • Patent number: 8741797
    Abstract: A composite article having a body including a first phase that includes a nitride material, a second phase that includes a carbide material, and a third phase having one of an amorphous phase material with a nitrogen content of at least about 1.6 wt % or an amorphous phase material comprising carbon.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: June 3, 2014
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Christopher J. Reilly, Vimal K. Pujari, Edmund A. Cortellini, David M. McElwee
  • Publication number: 20140100104
    Abstract: The present invention provides a method of preparing a carbon fiber-reinforced silicon carbide composite material, wherein carbon nanotubes are formed in the composite material, and then metal silicon is melted and infiltrated into the composite material, so the amount of unreacted metal is reduced and the strength of the composite material is improved, and provides a carbon fiber-reinforced silicon carbide composite material prepared by the method.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 10, 2014
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Se-Young KIM, Nam-Jo JEONG, In-Sub HAN, Sang-Kuk WOO, Doo-Won SEO, Kang BAI, Ji-Haeng YU, Sun-Dong KIM
  • Publication number: 20140094355
    Abstract: Provided is a novel method for producing a silicon carbide-carbon composite. A green body containing a carbonaceous material 2 having silicon nitride attached to a surface thereof is fired to obtain a silicon carbide-carbon composite 1.
    Type: Application
    Filed: May 24, 2012
    Publication date: April 3, 2014
    Applicant: TOYO TANSO CO., LTD.
    Inventors: Weiwu Chen, Yoshinari Miyamoto, Tetsuro Tojo
  • Publication number: 20140038808
    Abstract: A process for the fabrication of a SiC-based article that includes preparing an aqueous suspension with SiC powder, a titanium source, a carbon source and boron carbide powder, spray drying the mixture to obtain a powder, preparing a green body from the powder, applying heat treatment to the green body in a pyrolysis/thermolysis step, pressureless sintering the green body, optimally followed by HIPing for further densification.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 6, 2014
    Inventors: Charles Schenck WILEY, Robert F. SPEYER
  • Patent number: 8618006
    Abstract: A cement free refractory mixture contains aluminum oxide, silicon carbide, fumed silica, aluminum metal, an anti-oxidant, reactive alumina, and a carbon-bearing material. The mixture can be formed by conventional techniques to create refractory articles to contain or direct the flow of liquid metals. Refractory articles formed by the mixture do not require firing to achieve an initial cure.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: December 31, 2013
    Assignee: Vesuvius Crucible Company
    Inventors: Robert A. Pattillo, Samuel B. Bonsall
  • Publication number: 20130323152
    Abstract: Provided are: a readily sinterable silicon carbide powder substantially having a stoichiometric composition and from which a dense sintered body can be obtained; a silicon carbide ceramic sintered body having a low specific resistance; and a production method thereof. This readily sinterable silicon carbide powder has a carbon/silicon elemental ratio of 0.96 to 1.04, an average particle diameter of 1.0 to 100 ?m, and a ratio of 20% or less of an integrated value of an absorption intensity in a chemical shift range of 0 to 30 ppm to an integrated value of an absorption intensity in a chemical shift range of 0 to 170 ppm, in a 13C-NMR spectrum. By sintering this silicon carbide powder under pressure, there can be produced a dense sintered body having a low specific resistance and a high purity.
    Type: Application
    Filed: February 28, 2012
    Publication date: December 5, 2013
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yoshitaka Aoki, Kazuhide Yanaizumi
  • Patent number: 8598057
    Abstract: A monolithic, unitary, seamless and physically continuous ceramic armor plate having first regions of one mechanical property and one chemical composition and one microstructural composition isolated from one another by a network of second regions of another mechanical property different from the one mechanical property and another chemical composition different from the one chemical composition and another microstructural composition different from the one microstructural composition, the one mechanical property and the another mechanical property being the propensity to crack.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: December 3, 2013
    Assignee: Verco Materials, LLC
    Inventor: Robert F. Speyer
  • 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
  • Patent number: 8575051
    Abstract: The invention relates to a heat sink comprising a diamond-containing composite material. In addition to a diamond content of 40-90% by volume, the composite material further comprises from 0.005 to 12% by volume of a silicon-carbon compound, from 7 to 49% by volume of an Ag-, Au- or Al-rich phase and less than 5% by volume of a further phase, with the volume ratio of the Ag-, Au or Al-rich phase to silicon carbide being greater than 4 and at least 60% of the diamond surface being covered by the silicon-carbon compound. Preferred production processes include atmospheric pressure and pressure-aided infiltration techniques. The component is suitable, in particular, as heat sink for semiconductor components.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: November 5, 2013
    Assignee: Plansee SE
    Inventor: Arndt Lüdtke
  • Publication number: 20130224479
    Abstract: A carbon-fiber-reinforced silicon-carbide-based composite material which has better strength and toughness, and a braking material, such as a brake disc using the composite material, are provided. By using the carbon-fiber-reinforced silicon-carbide-based composite material including a bundle of fibers having chopped carbon fibers arranged in parallel and the other carbon component, carbon, silicon, and silicon carbide, in which the fiber bundle is flat, its cross-section perpendicular to its longitudinal direction has a larger diameter of 1 mm or more, a ratio of the larger diameter to a smaller diameter is from 1.5 to 5, and a plurality of the fiber bundles are randomly oriented substantially along a two-dimensional plane, and a two-dimensional side serves as a braking side to thereby constitute the braking material.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 29, 2013
    Applicant: Covalent Materials Corporation
    Inventor: Covalent Materials Corporation
  • 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
  • Patent number: 8480993
    Abstract: A diamond reference standard contains a diamond composite of 60-90% diamond crystals and 10-40% silicon carbide binding agent doped with a plurality of elements. The standard is prepared by doping a diamond composite containing a silicon carbide binder with a plurality of elements, the presence of which can readily be detected using a variety of instruments, e.g. a mass spectrometer.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: July 9, 2013
    Assignee: Her Majesty the Queen in right of Canada as represented by the Solicitor General acting through the Commissoner of the Royal Canadian Mounted Police
    Inventors: David Ballantyne, Claude Dalpe
  • Publication number: 20130090228
    Abstract: A composite article having a body including a first phase that includes a nitride material, a second phase that includes a carbide material, and a third phase having one of an amorphous phase material with a nitrogen content of at least about 1.6 wt % or an amorphous phase material comprising carbon.
    Type: Application
    Filed: September 27, 2012
    Publication date: April 11, 2013
    Inventors: Christopher J. Reilly, Vimal K. Pujari, Edmund A. Cortellini, David M. McElwee
  • Patent number: 8357623
    Abstract: Methods of forming composite materials include coating particles of titanium dioxide with a substance including boron (e.g., boron carbide) and a substance including carbon, and reacting the titanium dioxide with the substance including boron and the substance including carbon to form titanium diboride. The methods may be used to form ceramic composite bodies and materials, such as, for example, a ceramic composite body or material including silicon carbide and titanium diboride. Such bodies and materials may be used as armor bodies and armor materials. Such methods may include forming a green body and sintering the green body to a desirable final density. Green bodies formed in accordance with such methods may include particles comprising titanium dioxide and a coating at least partially covering exterior surfaces thereof, the coating comprising a substance including boron (e.g., boron carbide) and a substance including carbon.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: January 22, 2013
    Assignee: U.S. Department of Energy
    Inventors: Thomas M. Lillo, Henry S. Chu, William M. Harrison
  • 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
  • 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: 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
  • Patent number: 8097546
    Abstract: A composition for ceramic extrusion-molded bodies includes a ceramic material, a water-soluble cellulose ether, a styrenesulfonate and water. A method for manufacturing a ceramic extrusion-molded body using the composition is also provided.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: January 17, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shingo Niinobe, Kazuhisa Hayakawa
  • Patent number: 7985354
    Abstract: Carbon nanomaterials are stabilized and uniformly dispersed in a liquid such as water using a simple procedure. Methylcellulose is added to hot water where it separates and expands with a temperature of about 80-90 degree Celsius. Methylcellulose swiftly dissolves when the water cools down. Carbon nanomaterials are dispersed in a solvent and sonicated. This nanomaterial dispersed solvent is then added to the methylcellulose dispersed water and mechanically stirred. The resulting uniform mixture is up to 90% by weight nanomaterials and is stable for months.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: July 26, 2011
    Assignee: Oceanit Laboratories, Inc.
    Inventor: Vinod P. Veedu
  • Publication number: 20110175264
    Abstract: A method of forming a sintered silicon carbide body includes mixing silicon carbide powder having an oxygen content of less than about 3 wt % and having a surface area in a range of between about 8 m2/g and about 15 m2/g, with boron carbide powder and carbon sintering aid to form a green silicon carbide body. Alternatively, a method of producing a sintered silicon carbide body includes mixing the silicon carbide powder with titanium carbide powder having an average particle diameter in a range of between about 5 nm and about 100 nm and with carbon sintering aid to form a green silicon carbide body. In another alternative, a method of forming a sintered silicon carbide body includes mixing silicon carbide powder with boron carbide powder, the titanium carbide powder, and carbon sintering aid to form a green silicon carbide body. After sintering, the silicon carbide bodies have a density at least 98% of the theoretical density of silicon carbide.
    Type: Application
    Filed: July 22, 2010
    Publication date: July 21, 2011
    Inventors: Vimal K. Pujari, Eric Jorge, Christopher J. Reilly
  • Publication number: 20110172080
    Abstract: A porous sintered silicon carbide body that includes silicon carbide and graphite and methods of making thereof are described. The porous silicon carbide body can be a seal. The porous sintered silicon carbide body defines pores with an average pore size in a range of between about 20 ?m and about 40 ?m, comprising a porosity in a range of between about 1% and about 5% by volume.
    Type: Application
    Filed: July 22, 2010
    Publication date: July 14, 2011
    Inventors: Vimal K. Pujari, Nikolas J. Ninos
  • Publication number: 20110160035
    Abstract: In a method of preparing a boron carbide material, boron carbide powder is washed with essentially pure water at an elevated temperature to generate washed boron carbide powder. The washed boron carbide powder is combined with a sintering aid. The mixture of the boron carbide powder and the sintering aid is pressed to form a shaped material, and the shaped material is sintered. A sintered boron carbide material comprises a boron carbide component that includes boron carbide, elemental carbon, and not more than about 0.6 wt % of oxygen on the basis of the total weight of the boron carbide component. The sintered boron carbide material has a density of at least about 99% of the theoretical density. Another sintered boron carbide material comprises a boron carbide component that includes boron carbide, silicon carbide, elemental carbon, and not more than about 0.3 wt % oxygen on the basis of the total weight of the boron carbide component, and has a density of at least about 97% of the theoretical density.
    Type: Application
    Filed: March 10, 2011
    Publication date: June 30, 2011
    Applicant: Saint-Gobain Ceramics & Platics, Inc.
    Inventors: Vimal K. Pujari, James T. Hennessey, William T. Collins
  • Patent number: 7959841
    Abstract: Uniformly dense, diamond-silicon carbide composites having high hardness, high fracture toughness, and high thermal stability are prepared by consolidating a powder mixture of diamond and amorphous silicon. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPa·m1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: June 14, 2011
    Assignee: Los Alamos National Security, LLC
    Inventor: Yusheng Zhao
  • Publication number: 20110124483
    Abstract: In various embodiments, composite materials containing a ceramic matrix and a carbon nanotube-infused fiber material are described herein. Illustrative ceramic matrices include, for example, binary, ternary and quaternary metal or non-metal borides, oxides, nitrides and carbides. The ceramic matrix can also be a cement. The fiber materials can be continuous or chopped fibers and include, for example, glass fibers, carbon fibers, metal fibers, ceramic fibers, organic fibers, silicon carbide fibers, boron carbide fibers, silicon nitride fibers and aluminum oxide fibers. The composite materials can further include a passivation layer overcoating at least the carbon nanotube-infused fiber material and, optionally, the plurality of carbon nanotubes. The fiber material can be distributed uniformly, non-uniformly or in a gradient manner in the ceramic matrix. Non-uniform distributions may be used to form impart different mechanical, electrical or thermal properties to different regions of the ceramic matrix.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 26, 2011
    Applicant: APPLIED NANOSTRUCTURED SOLUTIONS, LLC
    Inventors: Tushar K. SHAH, Harry C. Malecki, Murray N. Carson
  • Publication number: 20110082033
    Abstract: The present invention relates to a material including a matrix and at least one reinforcing element introduced therein, wherein the matrix is selected from the group consisting of plastic, carbon, ceramic, glass, clay, metal, and combinations thereof, and the reinforcing element is spherical to ellipsoidal in shape and has an onionskin-like structure. The present invention further relates to a method for producing a material including steps preparing at least one spherical to ellipsoidal reinforcing element having an onionskin-type structure, and introducing the reinforcing element into a matrix, wherein the matrix is selected from the group consisting of plastic, carbon, ceramic, glass, clay, metal, and combinations thereof. The present invention further relates to use of the material in a friction application, as abrasion protection, an injection moulding part, a support plate, catalyst substrate or as bone replacement material.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 7, 2011
    Inventors: Wilhelm Frohs, Andreas Kienzle, Ingrid Krätschmer
  • Publication number: 20110028301
    Abstract: Disclosed is a method for the synthesis of silicon carbide (SiC) bodies having a relative density of 99% or higher and a SiC body synthesized according to the method.
    Type: Application
    Filed: December 2, 2009
    Publication date: February 3, 2011
    Inventors: Lionel VARGAS-GONZALEZ, Robert SPEYER
  • Patent number: 7875211
    Abstract: A high performance multifunctional cementitious nanocomposite material is made by adding a nano admixture to the water used in a conventional cementitious material manufacturing process. The nano admixture is made by dispersing nanomaterials in a solvent and sonicating the mixture, adding a hydrophilic emulsifier, thickener, additive or cellulose derived compound to hot water, where it separates and expands, cooling the water, causing the compound to dissolve, and then adding the solvent and nanomaterial mixture to the water and mechanically mixing. The contact between the nanomaterials and the surrounding matrix changes with applied stress, affecting the volume electrical response of the finished nanocomposite material. By measuring the electrical resistance of the material, its structural health, as well as the stress applied to it, can be monitored. A bridge made with the material is monitored for structural integrity and for the weight, speed, and location of traffic over the bridge.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: January 25, 2011
    Assignee: Oceanit Laboratories, Inc.
    Inventor: Vinod P. Veedu
  • Publication number: 20100331166
    Abstract: An object of the present invention is to produce a heat-resistant carbon/silicon carbide system composite material having a high density without deteriorating the mechanical properties such as toughness of carbon fiber. The present invention is a carbon/silicon carbide system composite material comprising a matrix containing a silicon carbide phase; a carbon fiber dispersed in the matrix; and a eutectic alloy phase containing silicon and an element for lowering a melting point of the silicon, wherein the carbon fiber is covered with a cover layer formed of a composite carbide of the silicon and the element.
    Type: Application
    Filed: June 29, 2010
    Publication date: December 30, 2010
    Inventors: Kishio HIDAKA, Kazuya Baba, Makoto Ebihara
  • Publication number: 20100292069
    Abstract: This invention provides carbon composite materials, which comprise metal carbide particles, at least the particle surfaces or the entirety of which are metal carbides, synthesized in situ from a metal source, i.e., at least one member selected from the group comprising metal particles, metal oxide particles, and composite metal oxide particles, and a carbon source, i.e., a thermosetting resin, dispersed in a carbon, carbon fiber, or carbon/carbon fiber matrix, and contain no free metal particles. This invention also provides a method for producing such composite carbon materials, which enables the production of carbon composite materials having a high coefficient of friction, high thermostability, and abrasion resistance.
    Type: Application
    Filed: July 23, 2010
    Publication date: November 18, 2010
    Inventors: Shigeru Ichikawa, Sumio Kamiya, Koji Yamada, Hironori Sasaki
  • Publication number: 20100279845
    Abstract: A process for producing a silicon-containing CMC article that exhibits improved physical, mechanical, and microstructural properties at elevated temperatures exceeding the melting point of silicon. The process entails producing a body containing a ceramic reinforcement material in a solid matrix that comprises solid elemental silicon and/or silicon alloy and a ceramic matrix material. The ceramic matrix composite article is produced by at least partially removing the solid elemental silicon and/or silicon alloy from the solid matrix and optionally reacting at least part of the solid elemental silicon and/or silicon alloy in the solid matrix to form one or more refractory materials. The solid elemental silicon and/or silicon alloy is sufficiently removed from the body to enable the ceramic matrix composite article to structurally and chemically withstand temperatures above 1405° C.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 4, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anteneh Kebbede, Krishan Luthra, Gregory Corman
  • Publication number: 20100260972
    Abstract: This invention provides a protective member comprising a ceramic body comprising a plurality of first phases (2) composed mainly of silicon carbide and a plurality of second phases (3) having a composition different from the composition of the first phase (2) and containing at least boron, silicon and carbon. A part of the second phase is present in the first phase as a whole, and at least a part of the remaining part of the second phase is present between a plurality of the first phases.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 14, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Takehiro Oda, Teppei Kayama, Masahito Nakanishi
  • Patent number: 7776773
    Abstract: A boron carbide sintered body having a plurality of pores, comprises a boron carbide as a main component and a plurality of graphite particles dispersed in the sinter. The graphite particles is exposed to the pores or is in the vicinity of the pores.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: August 17, 2010
    Assignee: Kyocera Corporation
    Inventors: Nobuyuki Horiuchi, Teppei Kayama, Masahito Nakanishi, Takehiro Oda
  • Publication number: 20100179045
    Abstract: A composite material having a fibrous structure and a coating is disclosed. More specifically, a composite material may be comprised of a fibrous structure having a surface and impregnated with a interface material, a first ceramic material, a ceramic mixture, and a third ceramic material or alloy material or combination thereof, a coating disposed on the surface of the fibrous structure, wherein the coating comprises a first ceramic coating material and a ceramic coating mixture.
    Type: Application
    Filed: January 12, 2009
    Publication date: July 15, 2010
    Applicant: GOODRICH CORPORATION
    Inventors: Vincent Fry, Ron Kestler, Andy Lazur
  • Publication number: 20100179049
    Abstract: A silicon carbide-silicon carbide fiber composite consists of silicon carbide particles and silicon carbide fibers. The composite has excellent oxidation resistance and finds a wide range of application as heat resistant material. The silicon carbide conversion method is simple and consistent enough to ensure production of silicon carbide-silicon carbide fiber composites with minimized variation in quality.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 15, 2010
    Inventors: Hirofumi FUKUOKA, Susumu Ueno, Toshio Okada, Meguru Kashida