Composites (continuous Matrix With Dispersed Fiber Phase) Patents (Class 501/95.2)
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Publication number: 20110071014Abstract: A method of forming a highly densified chemical matrix composite CMC from a preform of a matrix of a non-oxide ceramic and continuous ceramic fibers. An interface coating is added, followed by partially densifying the preform with a resin to increase the density of the preform using a polymer infiltration pyrolysis PIP) process one or more times. A chemical vapor infiltration (CVI) process is used to bring the CMC to a final desired density.Type: ApplicationFiled: September 24, 2009Publication date: March 24, 2011Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Michael A. Kmetz, Kirk C. Newton
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Publication number: 20110071015Abstract: A method for preparing a high-temperature heat-resistant composite material by combining a mixture of submicron alumina powder and submicron silica powder, wherein the ratio of alumina to silica is from about 4:1 to about 5:1, submicron Group II metal oxide powder, and a Group I metal silicate solution to form a slurry, wherein the weight of the Group II metal oxide powder is an amount corresponding to about 5% to about 10% of the weight of the silicate solution; contacting reinforcing high-temperature resistant fibers with the slurry to form a composite precursor composition; and curing the composition at a temperature sufficient to produce the high-temperature heat-resistant composite material capable of resisting temperatures up to about 1400° C. Composite materials prepared according to the method and articles incorporating the material are also presented.Type: ApplicationFiled: November 16, 2010Publication date: March 24, 2011Applicant: Rutgers, The State UniversityInventor: Perumalsamy Naidu Balaguru
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Patent number: 7893000Abstract: Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.Type: GrantFiled: August 16, 2010Date of Patent: February 22, 2011Assignee: The DoshishaInventors: Ken Hirota, Yoshihiro Nakayama, Shingo Nakane
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Patent number: 7858554Abstract: A porous cordierite substrate and a method of forming a porous cordierite substrate including providing a fiber that includes at least one cordierite precursor material and providing at least one organic binder material. The fiber and the organic binder material are mixed with a fluid. The mix of fiber, organic binder material and fluid is extruded into a green substrate. The green substrate is fired to enable the formation of bonds between the fibers and to form a porous cordierite fiber substrate.Type: GrantFiled: May 24, 2007Date of Patent: December 28, 2010Assignee: Geo2 Technologies, Inc.Inventors: James Jenq Liu, Bilal Zuberi, Jerry G. Weinstein, Rachel A. Dahl, William M. Carty
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Patent number: 7854882Abstract: A method for preparing a high-temperature heat-resistant composite material by combining a mixture of submicron alumina powder and submicron silica powder, wherein the ratio of alumina to silica is from about 4:1 to about 5:1, submicron Group II metal oxide powder, and a Group I metal silicate solution to form a slurry, wherein the weight of the Group II metal oxide powder is an amount corresponding to about 5% to about 10% of the weight of the silicate solution; contacting reinforcing high-temperature resistant fibers with the slurry to form a composite precursor composition; and curing the composition at a temperature sufficient to produce the high-temperature heat-resistant composite material capable of resisting temperatures up to about 1400° C. Composite materials prepared according to the method and articles incorporating the material are also presented.Type: GrantFiled: March 26, 2007Date of Patent: December 21, 2010Assignee: Rutgers, The State UniversityInventor: Perumalsamy Naidu Balaguru
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Patent number: 7820278Abstract: A refractory mortar cured material is formed in the surface or joint portions of a ceramic refractory material, such as fire bricks used in the lining of melting furnace or firing furnace used at high temperature, and includes ceramic particles with an inorganic binder having silanol group that are kneaded together with water. The kneaded mortar is applied on the surface of a ceramic base material. The average particle size of ceramic particles in the refractory mortar is 10 to 50 ?m, and the difference between the 90% particle size and the 10% particle size is 10 ?m or more to 60 ?m or less. The average pore size of the refractory mortar cured material is 5 to 25 ?m, and the width of pore size distribution is 20 to 80 ?m, so that the cracks are suppressed. In addition, the bulk density is 0.9 to 1.5 g/cm3.Type: GrantFiled: February 21, 2008Date of Patent: October 26, 2010Assignees: NGK Insulators, Ltd., NGK Adrec Co., Ltd.Inventors: Tsuneo Komiyama, Osamu Yamakawa, Tetsuhiro Honjo, Akito Higuchi
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Patent number: 7799715Abstract: Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.Type: GrantFiled: September 12, 2008Date of Patent: September 21, 2010Assignee: The DoshishaInventors: Ken Hirota, Yoshihiro Nakayama, Shingo Nakane
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Patent number: 7723610Abstract: The invention relates to a titanium oxide-based polymer composition. The inventive composition comprises a TiOx(OH)y(H2O)z(x+y?+z=3) titanium oxide-based polymer in the form of a gel or sol. Said polymer, which has a one-dimensional (1D) structure, is made from concentrically-wound fibers having a periodicity which is deduced from the spacing between said fibers, of between 3.5 ? and 4 ?. Each fiber comprises TiO6octahedrons and each TiO6octahedron shares two opposite edges with two adjacent octahedrons (2.times.2.92 ?) in order to form infinite chains which develop along the axis of a fiber. According to the invention, two adjacent chains form double lines as a result of the shared edges (2.times.3.27 ?). The inventive polymer is suitable for use as a photosensitive element in a photovoltaic cell, such as a sunscreen for a window.Type: GrantFiled: March 18, 2009Date of Patent: May 25, 2010Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)Inventors: Luc Brohan, Hari Sutrisno, Yves Piffard, Maria Teresa Caldes-Rouillon, Olivier Joubert, Eric Puzenat, Annabelle Rouet
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Publication number: 20100117272Abstract: The present invention provides a ceramic precursor batch composition comprising inorganic ceramic-forming ingredients, a binder, an aqueous solvent and a chaotropic agent. The chaotropic agent can be urea, methylurea, ethylurea, n-butylurea, 1,3-dimethylurea, ethyleneurea, 1,1-dimethylurea, tetramethylurea, thiourea or mixtures thereof. The presence of the chaotropic agent provides a composition with a lower viscosity and/or a greater batch stiffening temperature allowing for increased rates of extrusion. Methods for producing a ceramic honeycomb body using the ceramic precursor batch composition of the present invention are also provided.Type: ApplicationFiled: November 13, 2008Publication date: May 13, 2010Inventor: MICHAEL EDWARD DEROSA
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Publication number: 20100081556Abstract: An oxide-based ceramic matrix composite and a method of making oxide-based ceramic composite are provided. The oxide-based ceramic matrix composite comprises a ceramic fiber and a mullite-alumina impregnating the ceramic fiber, wherein the mullite-alumina ceramic matrix comprises of 10-70 wt % mullite-alumina mixture.Type: ApplicationFiled: July 21, 2006Publication date: April 1, 2010Inventors: Vann Heng, Robert A. DiChiara, JR., Susan Saragosa, Elizabeth Chu, Carlos G. Levi, Frank W. Zok
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Publication number: 20100068601Abstract: A fibrous ceramic material including a plurality of fibers entangled with one another. The fibrous ceramic material includes at least one connector projecting between the fibers. At least a portion of the fibers have the connectors extending between and attach the fibers to one another. A method of manufacturing the fibrous ceramic material includes providing a precursor material having a plurality of fibers. A holder is provided for holding the precursor material. The precursor material is placed on the holder and both are heated to between about 1500 degrees Celsius and about 1700 degrees Celsius to form the fibrous ceramic material, thereby causing connectors to project from a portion of the fibers and attach the fibers to one another.Type: ApplicationFiled: September 18, 2008Publication date: March 18, 2010Inventors: Chao-Yi Yuh, Dana A. Kelley, Nikhil H. Jalani
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Patent number: 7666344Abstract: The disclosed invention relates to ceramic matrix composites with ceramic fiber reinforcements.Type: GrantFiled: March 11, 2008Date of Patent: February 23, 2010Assignee: Stanton Advanced Ceramics, Inc.Inventors: Karl-Heinz Schofalvi, Gerald C. Dodds
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Patent number: 7648932Abstract: The invention relates to a process for the production of a molded porous ceramic article containing ?-SiC, which process comprises the following steps: the preparation of a molded article containing silicon and carbon and the subsequent pyrolysis and siliconization of the article containing silicon and carbon to form SiC. The invention further relates to a molded porous ceramic article containing SiC which has been produced from a molded article containing silicon and carbon.Type: GrantFiled: July 5, 2006Date of Patent: January 19, 2010Assignee: Mann+Hummel Innenraumfilter GmbH & Co. KGInventors: Lars Weisensel, Thomas Wolff, Heino Sieber, Peter Greil
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Publication number: 20090295045Abstract: A method is provided for producing insulation materials and insulation for high temperature applications using novel castable and powder-based ceramics. The ceramic components produced using the proposed process offers (i) a fine porosity (from nano-to micro scale); (ii) a superior strength-to-weight ratio; and (iii) flexibility in designing multilayered features offering multifunctionality which will increase the service lifetime of insulation and refractory components used in the solid oxide fuel cell, direct carbon fuel cell, furnace, metal melting, glass, chemical, paper/pulp, automobile, industrial heating, coal, and power generation industries. Further, the ceramic components made using this method may have net-shape and/or net-size advantages with minimum post machining requirements.Type: ApplicationFiled: August 14, 2006Publication date: December 3, 2009Inventors: Akash Akash, Nair Balakrishnan G.
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Publication number: 20090280257Abstract: A method for forming interphase layers in ceramic matrix composites. The method forms interphase layers in ceramic matrix composites thereby enabling higher matrix densities to be achieved without sacrificing crack deflection and/or toughness. The methods of the present invention involve the use fugitive material-coated fibers. These fibers are then infiltrated with a ceramic matrix slurry. Then, the fugitive material is removed and the resulting material is reinfiltrated with an interphase layer material. The ceramic matrix composite is then fired. Additional steps may be included to densify the ceramic matrix or to increase the strength of the interphase layer. The method is useful for the formation of three dimensional fiber-reinforced ceramic matrix composites envisioned for use in gas turbine components.Type: ApplicationFiled: December 14, 2004Publication date: November 12, 2009Inventor: Jay Morrison
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Publication number: 20090264274Abstract: 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 resulting mixture with water and then drying and solidifying it, wherein the aggregate part contains at least SiC, the bonding part is constructed by hydration reaction, and monofilaments comprising SiC inorganic fibers containing 50% or more SiC in their main component, 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: ApplicationFiled: February 24, 2009Publication date: October 22, 2009Applicant: ARIAKE CERAMIC CONSTRUCTIONS CO., LTDInventors: Shigeru Fukumaru, Hiroshi Ichikawa
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Patent number: 7597838Abstract: A ceramic matrix composite with a ceramic matrix and a gradient layering of coating on ceramic fibers. The coating typically improves the performance of the composite in one direction while degrading it in another direction. For a SiC-SiC ceramic matrix composite, a BN coating is layered in a gradient fashion or in a step-wise fashion in different regions of the article comprising the ceramic. The BN coating thickness is applied over the ceramic fibers to produce varying desired physical properties by varying the coating thickness within differing regions of the composite, thereby tailoring the strength of the composite in the different regions. The coating may be applied as a single layer as a multi-layer coating to enhance the performance of the coating as the ceramic matrix is formed or infiltrated from precursor materials into a preform of the ceramic fibers.Type: GrantFiled: December 30, 2004Date of Patent: October 6, 2009Assignee: General Electric CompanyInventors: Suresh Subramanian, James Dale Steibel, Douglas Melton Carper, Toby George Darkins, Jr.
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Publication number: 20090181292Abstract: A thin, flexible, porous ceramic composite (PCC) film useful as a separator for a molten-salt thermal battery comprises 50% to 95% by weight of electrically non-conductive ceramic fibers comprising a coating of magnesium oxide on the surface of the fibers in an amount in the range of 5% to 50% by weight. The ceramic fibers comprise Al2O3, AlSiO2, BN, AlN, or a mixture of two or more of the foregoing; and the magnesium oxide coating interconnects the ceramic fibers providing a porous network of magnesium oxide-coated fibers having a porosity of not less than 50% by volume. The pores of the film optionally can include a solid electrolyte salt. A laminated electrode/PCC film combination is also provided, as well as a thermal battery cell comprising the PCC film as a separator.Type: ApplicationFiled: December 1, 2008Publication date: July 16, 2009Inventor: Thomas D. Kaun
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Publication number: 20090149310Abstract: A pulling roll for glass manufacture comprised of a high-temperature millboard material. The millboard comprises aluminosilicate refractory fiber, silicate, mica, and kaolin clay. A method of manufacturing a pulling roll is disclosed, together with a roll produced by the methods disclosed herein. The method comprises forming a pulling roll and densifying at least a portion of the pulling roll by exposing to the pulling roll to high temperatures.Type: ApplicationFiled: February 10, 2009Publication date: June 11, 2009Inventors: Dean Veral Neubauer, Maurice Lacasse
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Patent number: 7524482Abstract: The invention relates to a titanium oxide-based polymer composition. The inventive composition comprises a TiOx(OH)y(H2O)z (x+y+z=3) titanium oxide-based polymer in the form of a gel or sol. Said polymer, which has a one-dimensional (1D) structure, is made from concentrically-wound fibers having a periodicity which is deduced from the spacing between said fibers, of between 3.5 ? and 4 ?. Each fiber comprises TiO6octahedrons and each TiO6octahedron shares two opposite edges with two adjacent octahedrons (2×2.92 ?) in order to form infinite chains which develop along the axis of a fiber. According to the invention, two adjacent chains form double lines as a result of the shared edges (2×3.27 ?). The inventive polymer is suitable for use as a photosensitive element in a photovoltaic cell, such as a sunscreen for a window.Type: GrantFiled: January 14, 2003Date of Patent: April 28, 2009Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)Inventors: Luc Brohan, Hari Sutrisno, Yves Piffard, Maria Teresa Caldes-Rouillon, Olivier Joubert, Eric Puzenat, Annabelle Rouet
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Patent number: 7507466Abstract: The present invention is ceramic matrix composite gas turbine engine component comprising a plurality of cured ceramic matrix composite plies, each ply comprising ceramic fiber tows, each ceramic fiber tow comprising a plurality of ceramic fibers, the tows in each ply lying adjacent to one another such that each ply has a unidirectional orientation. The component further comprises a layer of a coating on the ceramic fibers. The component further comprises a ceramic matrix material lying in interstitial regions between the fibers and tows of each ply and the interstitial region between the plurality of plies, wherein at least a portion of the component is no greater than about 0.021 inch thick. The present invention is also a method for making such a ceramic matrix composite component.Type: GrantFiled: February 22, 2006Date of Patent: March 24, 2009Assignee: General Electric CompanyInventors: James D. Steibel, Stephen M. Whiteker, Douglas M. Carper, Suresh Subramanian
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Publication number: 20090071160Abstract: A ceramic hybrid structure (207, 502, 602, 608) that includes a wavy ceramic matrix composite (CMC) wall (214, 532, 603, 609) bonded with a ceramic insulating layer (230, 538, 604, 610) having a distal surface (242) that may define a hot gas passage (250, 550, 650) or otherwise be in proximity to a source of elevated temperature. In various embodiments, the waves (216, 537, 637) of the CMC wall (214, 532, 603, 609) may conform to the following parameters: a thickness (222) between 1 and 10 millimeters; an amplitude (224) between one and 2.5 times the thickness; and a period (226) between one and 20 times the amplitude. The uninsulated backside surface (218) of the CMC wall (214) provides a desired stiffness and strength and enhanced cooling surface area. In various embodiments the amplitude (224), excluding the thickness (222), may be at least 2 mm.Type: ApplicationFiled: September 14, 2007Publication date: March 19, 2009Applicant: SIEMENS POWER GENERATION, INC.Inventors: Douglas A. Keller, Anthony L. Schiavo, Jay A. Morrison
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Publication number: 20090069169Abstract: A method of making high performance friction materials with tailored levels of a ceramic hard phase to achieve optimum thermal conductivity, friction coefficient and wear performance of composite brake materials. In accordance with one method of the invention specific end-use application friction requirements are satisfied by tailoring the level of carbon in a selected carbon/carbon preform, heat treating the carbon/carbon composite preform, thereby affecting thermal conductivity so as to optimize overall braking performance prior to ceramic processing and by selecting an optimum level of ceramic hard phase to achieve satisfactory friction disc wear life and friction characteristics of the braking material.Type: ApplicationFiled: May 16, 2008Publication date: March 12, 2009Inventor: Dieter Bauer
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Patent number: 7494950Abstract: The present invention relates in general to implantable compositions, and method for preparing same, containing a calcium salt-containing component, optionally demineralized bone, a plurality of discrete fibers, optionally a flow additive, and optionally continuous reinforcing fibers or an array of organized fibers in the form of mesh. Advantageously, the discrete fibers have a specific aspect ratio (length/diameter) from about 50:1 to about 1000:1. The addition of a small amount of discrete fibers and/or the continuous reinforcing fibers or fiber mesh can cause drastic increases in certain mechanical properties including flexural strength, flexural toughness, and/or screw pullout strength.Type: GrantFiled: September 7, 2004Date of Patent: February 24, 2009Assignees: Synthes (U.S.A.), Synthes GmbHInventors: Bryan Monro Armitage, Ira Ison, Mark Fulmer, Sean Kerr, Michael Lehmicke, Patrick Leamy, William Schiffer
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Patent number: 7481267Abstract: Ceramic materials are converted to materials with anisotropic thermal properties, electrical properties, or both, by forming the ceramics into composites with carbon nanotubes dispersed therein and uniaxially compressing the composites in a direction in which a lower thermal or electrical conductivity is desired.Type: GrantFiled: May 24, 2005Date of Patent: January 27, 2009Assignee: The Regents of the University of CaliforniaInventors: Guodong Zhan, Joshua D. Kuntz, Amiya K. Mukherjee
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Publication number: 20090000260Abstract: A method of manufacturing a fibrous material includes mixing at least two cordierite precursor materials to form a mixture. One or more of the at least two cordierite precursor materials is in a form of a fiber and the mixture includes about 43% to about 51% by weight SiO2, about 36% to about 41% by weight Al2O3, and about 12% to about 16% by weight MgO. The method also includes extruding the mixture to create a fibrous body, and heat treating the fibrous body, at a temperature of about 1200° C. to about 1420° C., to form the fibrous material including about 50% to about 95% by weight cordierite. A fibrous body includes an extruded substrate having a plurality of fibers including about 50% to about 95% by weight cordierite. The extruded substrate has a coefficient of thermal expansion in at least one direction of less than about 3.8·10?6 per ° C.Type: ApplicationFiled: July 12, 2008Publication date: January 1, 2009Applicant: GEO2 Technologies, Inc.Inventors: James Jenq Liu, Bilal Zuberi, Rachel A. Dahl, William M. Carty
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Publication number: 20090005232Abstract: A ceramic matrix composite structure has a reinforced core for carrying loads. The core includes a web connected between the facesheets by edge bonded joints for transmitting compressive, tensile and shear loads. The edge bonded joints are laterally reinforced by bridging members bonded to the facesheets, on opposite sides of the webs The bridging members may comprise low density, high temperature rigid foam.Type: ApplicationFiled: June 28, 2007Publication date: January 1, 2009Inventors: Michael L. Hand, Leanne L. Lehman, Miklos P. Petervary
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Publication number: 20080293557Abstract: The disclosed invention relates to ceramic matrix composites with ceramic fiber reinforcements.Type: ApplicationFiled: March 11, 2008Publication date: November 27, 2008Inventors: Karl-Heinz Schofalvi, Gerald C. Dodds
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Publication number: 20080214381Abstract: A method for preparing a high-temperature heat-resistant composite material by combining a mixture of submicron alumina powder and submicron silica powder, wherein the ratio of alumina to silica is from about 4:1 to about 5:1, submicron Group II metal oxide powder, and a Group I metal silicate solution to form a slurry, wherein the weight of the Group II metal oxide powder is an amount corresponding to about 5% to about 10% of the weight of the silicate solution; contacting reinforcing high-temperature resistant fibers with the slurry to form a composite precursor composition; and curing the composition at a temperature sufficient to produce the high-temperature heat-resistant composite material capable of resisting temperatures up to about 1400° C. Composite materials prepared according to the method and articles incorporating the material are also presented.Type: ApplicationFiled: March 26, 2007Publication date: September 4, 2008Applicant: RUTGERS, THE STATE UNIVERSITYInventor: Perumalsamy Naidu Balaguru
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Publication number: 20080207430Abstract: The present invention pertains to a method for producing a polysilane-polycarbosilane copolymer solution, which comprises the preparation of a polysilane, obtained by the disproportionation of a methylchlorodisilane or a mixture of methylchlorodisilanes of the formula Si2MenCl6-n with a Lewis base as the catalyst, a subsequent thermal crosslinking of the polysilane to form an infusible polysilane-polycarbosilane copolymer that is soluble in inert solvents, as well as the production of said solution by the dissolution of the polysilane-polycarbosilane copolymer in an inert solvent. In addition, the present invention also pertains to a method for producing oxygen-depleted ceramic fibers and other molded bodies having a composition similar to that of SiC.Type: ApplicationFiled: May 2, 2005Publication date: August 28, 2008Inventors: Jurgen Clade, Erich Seider, Dieter Sporn, Erika Brendler, Thomas Lange, Gerhard Roewer, Dorit Meinhold
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Patent number: 7378362Abstract: The present invention is a composite material, a process and a product formed by the process. The composite is formed by a process that includes forming a fibrous structure comprising fibers into a preform, coating the fibers of the fibrous structure preform with elemental carbon to impregnate that preform, infiltrating the preform with boron carbide to form an impregnated green body. The impregnated green body is infiltrated with liquid naphthalene or other carbon precursor, which is thereafter pyrolyzed to form a carbon char. Then, the char infiltrated green body is infiltrated with molten silicon to form a continuous matrix throughout the composite. The silicon in the continuous matrix is reacted with the carbon char to form silicon carbide.Type: GrantFiled: October 24, 2003Date of Patent: May 27, 2008Assignee: Goodrich CorporationInventors: Thomas Dwayne Nixon, Sai-Kwing Lau, Edward R. Stover, Salvatore J. Calandra, Vijay V. Pujar, Lanny Ritz, Gary L. Clark, Steve T. Keller
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Patent number: 7306828Abstract: The present invention is directed towards a ceramic nanocomposite comprising a nanostructured carbon component inside a ceramic host. The ceramic nanocomposite may further comprise vapor grown carbon fibers. Such nanostructured carbon materials impart both structural and thermal barrier enhancements to the ceramic host. The present invention is also directed towards a method of making these ceramic nanocomposites and for methods of using them in various applications.Type: GrantFiled: December 22, 2005Date of Patent: December 11, 2007Assignee: William Marsh Rice UniversityInventors: Enrique V. Barrera, Leonard Lee Yowell, Jr., Brian Mitchell Mayeaux, Erica L. Corral, Joseph Cesarano, III
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Patent number: 7300621Abstract: A green body ceramic matrix composite material (30) is formed using ceramic fibers (32) in an intermediate state disposed in a green body ceramic matrix material (34). The fibers may be in either a dry but unfired (green) condition or in a partially fired condition. Selective control of the degree of pre-firing (pre-shrinkage) of the fibers may be used to control the level of residual stresses within the resulting refractory material resulting from differential shrinkage of the fibers and the matrix material during processing of the composite material.Type: GrantFiled: March 16, 2005Date of Patent: November 27, 2007Assignee: Siemens Power Generation, Inc.Inventor: Gary Brian Merrill
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Patent number: 7223465Abstract: The present invention is a ceramic matrix composite turbine engine component, wherein the component has a region of expected higher interlaminate stress during normal engine operation. The component includes both coated fiber tows and uncoated fiber tows arranged together into a preselected form, wherein the uncoated fiber tows are located at predetermined regions of expected high interlaminate stress. The invention further includes method of manufacturing a CMC such as a composite turbine engine component, wherein the component has a region of expected higher interlaminate stress during engine operation.Type: GrantFiled: December 29, 2004Date of Patent: May 29, 2007Assignee: General Electric CompanyInventors: Suresh Subramanian, James Dale Steibel, Douglas Melton Carper
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Patent number: 7208432Abstract: The invention relates to friction linings for structural and functional elements used in braking systems, especially in systems for motor vehicles. Said friction linings consist of an inorganic composite material which in turn consists of a glass or glass ceramics matrix, inorganic reinforcing fibers and one or more fillers, including one or more anti-friction substances with planar hexagonal structural elements.Type: GrantFiled: October 13, 2000Date of Patent: April 24, 2007Assignee: Schott AGInventors: Wolfram Beier, Rainer Liebald, Jochen Heinz
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Patent number: 7198839Abstract: The invented insulation is a ceramic fiber insulation wherein the ceramic fibers are treated with a coating which contains transition metal oxides. The invented process for coating the insulation is a process of applying the transition metal oxide coating to the fibers of the insulation after the fibers have been formed into a tile or other porous body. The coating of transition metal oxide lowers the transmittance of radiation through the insulation thereby lowering the temperature of the backface of the insulation and better protecting the structure that underlies the insulation.Type: GrantFiled: August 16, 2002Date of Patent: April 3, 2007Assignee: The Boeing CompanyInventors: Alfred A. Zinn, Ryan Jeffrey Tarkanian
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Patent number: 7150837Abstract: Insulation materials suited to high temperature applications, such as the insulation of furnaces, are formed from a mixture of pitch carbon fibers, such as isotropic pitch carbon fibers, and a binder comprising a solution of sugar in water. The sugar solution is preferably at a concentration of from 20–60% sucrose to yield a low density material having high flexural strength and low thermal conductivity when carbonized to a temperature of about 1800° C.Type: GrantFiled: June 10, 2004Date of Patent: December 19, 2006Assignee: UCAR Carbon Company, Inc.Inventors: Charles C. Chiu, Irwin Charles Lewis, Ching-Feng Chang
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Patent number: 7112547Abstract: Production processes of an inorganic fiber-bonded ceramic component comprising inorganic fibers mainly comprising Si, M, C and O, an inorganic substance mainly comprising Si and O and boundary layers comprising carbon as a main component; and an inorganic fiber-bonded ceramic component comprising inorganic fibers which are composed mainly of a sintered structure of SiC and contain specific metal atoms and boundary layers composed mainly of carbon, wherein a preliminary shaped material is set in a carbon die, covered with a carbon powder and then hot-pressed to load a pseudo-isotropic pressure on the preliminary shaped material; and a highly heat-resistant inorganic fiber-bonded ceramic component almost free from the occurrence of peelings of surface fibers or delamination, wherein fibers are aligned in a surface shape.Type: GrantFiled: August 6, 2003Date of Patent: September 26, 2006Assignee: UBE Industries, Ltd.Inventors: Shinji Kajii, Kenji Matsunaga, Toshihiko Hogami, Mitsuhiko Sato
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Patent number: 7048996Abstract: A temperature resistant material, comprising a temperature resistant matrix and a set of short metal fibers, which characterized in that the set of short metal fibers represents at least 0.5% by weight of the temperature resistant material. The set of short metal fibers has an equivalent diameter D in the range of 1 to 150 ?, and comprising curved fibers and entangled fibers. The curved fibers have an average length L in the range of 10 to 2000 ?.Type: GrantFiled: December 10, 2001Date of Patent: May 23, 2006Assignee: N.V. Bekaert S.A.Inventors: Ronny Losfeld, Lieven Anaf
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Patent number: 7012035Abstract: Material from a fibre composite ceramic, constructed from a) a dense fabric or cluster of three-dimensional oriented fibres with a high thermal conductivity, b) a crystalline matrix of ?-silicon carbide, that is produced in a CVI process on the fibres, c) a matrix component of ?-silicon carbide that in a polymer infiltration and pyrolysis process is generated in pores of the fabric structure, starting from a suspension of silicon carbide powder in a polymer, and d) a further matrix component of ?-silicon carbide that is created in a CVI process in cracks and pores of the material, caused by the preceding pyrolysis process.Type: GrantFiled: February 6, 2003Date of Patent: March 14, 2006Assignee: MT Aerospace AGInventor: August Mühlratzer
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Patent number: 6987076Abstract: A composite material comprises inorganic-bonded alkaline earth silicate fibers in which any bonding agents or fillers comprise low amounts of aluminum so that the composite material comprises less than 1% by weight aluminum expressed as Al2—O3.Type: GrantFiled: September 14, 1999Date of Patent: January 17, 2006Assignee: The Morgan Crucible Company plcInventors: Gary Anthony Jubb, Jean-Louis Martin, Jane Miller, Arlette Wotovic, Lindsay John Harold Todd
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Patent number: 6986940Abstract: A fiber reinforced composite article, comprising a matrix and reinforcing fibers and subjected during operation concurrently to a plurality of temperatures and stresses, varying between a plurality of regions of the article, experiences different stresses concurrently in different regions of the article. The article is provided with fiber reinforcement of a strength in each region greater than the stress experienced in that region. Such fiber reinforcement is provided through a member for inclusion in the matrix, for example in the form of at least one of a fabric, weave, braid, lay-up, etc. One form of such an article for use at relatively high temperatures is a turbine engine component, for example a gas turbine engine exhaust flap. Another form of such an article is a gas turbine engine blading component.Type: GrantFiled: July 27, 2000Date of Patent: January 17, 2006Assignee: General Electric CompanyInventor: Douglas Melton Carper
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Patent number: 6905992Abstract: A ceramic composite made by compacting a starting powder blend. The composite includes between about 50 volume percent and about 99 volume percent of a ceramic matrix; and between about 1 volume percent and about 50 volume percent as-processed silicon carbide whiskers. The ceramic composite having a fracture toughness (KIC) of greater than about 4.0 MPam1/2. The ceramic has a silicon carbide whisker density as measured in whiskers per square millimeter equal to or less than about 1500 times the volume percent of silicon carbide whiskers, but in a density sufficient for the ceramic composite to have the fracture toughness.Type: GrantFiled: July 30, 2002Date of Patent: June 14, 2005Assignee: Kennametal Inc.Inventors: Pankaj K. Mehrotra, Shanghua Wu
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Patent number: 6896968Abstract: A protective coating for a carbon-containing component comprises a material selected from the group consisting of non-stoichiometric silicon and carbon; non-stoichiometric silicon and oxygen; non-stoichiometric silicon and nitrogen; compounds of silicon, oxygen, and carbon; compounds of silicon, oxygen and nitrogen; compounds of silicon, nitrogen, and carbon; and silicon.Type: GrantFiled: April 6, 2001Date of Patent: May 24, 2005Assignee: Honeywell International Inc.Inventor: Ilan Golecki
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Patent number: 6893992Abstract: A dry refractory composition having superior resistance to crack propagation. The dry refractory composition includes at least matrix material, filler lightweight material, and metal fibers. The composition also may include dense refractory aggregate. The dry refractory composition is suitable for use in containing heat in metal containment and other applications.Type: GrantFiled: February 7, 2003Date of Patent: May 17, 2005Assignee: Allied Mineral Products, IncInventors: Douglas K. Doza, Dana G. Goski, Yuechu Ma
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Patent number: 6875374Abstract: Composite materials formed of a matrix of fused ceramic grains with single-wall carbon nanotubes dispersed throughout the matrix and a high relative density, notably that achieved by electric field-assisted sintering, demonstrate unusually high electrical conductivity in combination with high-performance mechanical properties including high fracture toughness. This combination of electrical and mechanical properties makes these composites useful as electrical conductors in applications where high-performance materials are needed due to exposure to extreme conditions such as high temperatures and mechanical stresses.Type: GrantFiled: February 26, 2003Date of Patent: April 5, 2005Assignee: The Regents of the University of CaliforniaInventors: Guodong Zhan, Joshua D. Kuntz, Amiya K. Mukherjee
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Patent number: 6864199Abstract: A dry refractory composition having superior resistance to crack propagation. The dry refractory composition includes at least matrix materials and metal fibers. The composition also may include dense refractory aggregate. The dry refractory composition is particularly suitable for use in metal containment applications.Type: GrantFiled: February 7, 2003Date of Patent: March 8, 2005Assignee: Allied Mineral Products, Inc.Inventors: Douglas K. Doza, Dana G. Goski, Yuechu Ma
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Patent number: 6844091Abstract: A flexible insulation blanket having a ceramic matrix composite (CMC) outer layer, and a method of producing a flexible insulation blanket having a smooth, aerodynamically suitable, outer surface by infiltrating ceramic material within the outer ceramic fabric layer of the flexible insulation blanket and curing the ceramic material to form a CMC layer. The CMC layer is cured while the blanket is under compression such that the resulting CMC layer has a smooth surface.Type: GrantFiled: November 11, 2002Date of Patent: January 18, 2005Assignee: The Boeing CompanyInventors: Jerry Denham, Robert A. Dichiara, Jr., Vann Heng, Leanne L. Lehman, David Zorger
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Publication number: 20040207133Abstract: A carbon fiber-carbon matrix reinforced ceramic composite comprises a carbon fiber-carbon matrix reinforcement embedded within a ceramic matrix. The ceramic matrix does not penetrate into the carbon fiber-carbon matrix reinforcement to any significant degree. The carbide matrix is a formed in situ solid carbide of at least one metal having a melting point above about 1850 degrees centigrade. At least when the composite is intended to operate between approximately 1500 and 2000 degrees centigrade for extended periods of time the solid carbide with the embedded reinforcement is formed first by reaction infiltration. Molten silicon is then diffused into the carbide. The molten silicon diffuses preferentially into the carbide matrix but not to any significant degree into the carbon-carbon reinforcement.Type: ApplicationFiled: April 15, 2004Publication date: October 21, 2004Inventors: Brian Williams, Robert Benander
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Patent number: 6803108Abstract: Carbon fiber bundles may be dispersed into substantially single mono-filaments in pitch by stirring a mixture of fibers and pitch at a temperature at which the pitch has a viscosity of about 0.1 to about 5 poise. The resulting fiber pitch binder contains about 0.5 to about 10.0 wt. % carbon fibers substantially dispersed as substantially single mono-filaments which are randomly oriented which may then be used directly as a binder for producing carbon bodies, for example, graphite electrodes, pinstock or specialty graphite articles. This unique binder using an economical amount of carbon fibers has the capacity to increase the strength and reduce the coefficients of thermal expansion of the resulting carbon products in more than one direction due to the random orientation of the carbon fibers.Type: GrantFiled: February 11, 2002Date of Patent: October 12, 2004Assignee: UCAR Carbon Company Inc.Inventors: Irwin C. Lewis, Terrence A. Pirro