Laterally Noncoextensive Components (e.g., Embedded, Etc.) Patents (Class 428/614)
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Patent number: 5296310Abstract: A hybrid structural material combines high thermal conductivity and pre-determined mechanical properties compatible with adjacent or attached materials. It has three elements: (1) a non-structural, high thermal conductivity core material which defines the thermal conductivity of the hybrid structural material; (2) a pair of face sheets, which form opposing surfaces of the hybrid structural material and help to define its mechanical properties, disposed on opposite sides of the core material to create a face sheet-core material-face sheet sandwich construction; and (3) a frame substantially surrounding the core material and bonded to the face sheets for helping to define (along with the face sheets) the mechanical properties of the hybrid structural material.The interfaces between the face sheets and the core material allow physical contact, but prevent structural interaction, between the face sheets and the core material.Type: GrantFiled: February 14, 1992Date of Patent: March 22, 1994Assignee: Materials Science CorporationInventors: John J. Kibler, Thomas G. Cassin
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Patent number: 5286577Abstract: Wire of co-drawn composite of conductor core and matrix is provided, for instance in the form of high purity aluminum conductor and Al-Fe-Ce alloy matrix, suitable for use for electrical conduction at cryogenic temperatures. Included are extrusion and drawing processes enabling successful production.Type: GrantFiled: July 23, 1990Date of Patent: February 15, 1994Assignee: Aluminum Company of AmericaInventors: M. K. Premkumar, Gary W. Malette
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Patent number: 5279902Abstract: An air hardened steel having a reduced nickel content and acceptable impact hardness. The air hardened steel may include 0.18-0.35 w/o carbon, 1.3-1.75 w/o silicon, 1.3-2.0 w/o manganese, 0.65-2.1 w/o chromium, 0.9-2.0 w/o nickel and 0.2-0.35 w/o molybdenum and the balance impurities, deoxidants, and iron.Type: GrantFiled: December 3, 1991Date of Patent: January 18, 1994Assignee: Kennametal Inc.Inventor: James P. Materkowski
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Patent number: 5277990Abstract: Composite structures having a higher density, stronger reinforcing niobium based alloy embedded within a lower density, lower strength niobium based alloy are provided. The matrix is preferably an alloy having a niobium and titanium base according to the expression:Nb--Ti.sub.32-45 --Al.sub.3-18 --Hf.sub.8-15and the reinforcement may be in the form of strands of the higher strength, higher temperature niobium based alloy. The same crystal form is present in both the matrix and the reinforcement and is specifically body centered cubic crystal form.Type: GrantFiled: January 2, 1992Date of Patent: January 11, 1994Assignee: General Electric CompanyInventors: Mark G. Benz, Melvin R. Jackson, John R. Hughes
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Patent number: 5277989Abstract: A net shaped ceramic-reinforced aluminum matrix composite is formed by forming a permeable mass of ceramic material with a defined surface boundary having a barrier, and contacting a molten aluminum-magnesium alloy with the permeable mass of ceramic material in the presence of a gas comprising from about 10 to 100% nitrogen, by volume, balance nonoxidizing gas, e.g. hydrogen or argon. Under these conditions, the molten alloy spontaneously infiltrates the ceramic mass under normal atmospheric pressures until it reaches the barrier. A solid body of the alloy can be placed adjacent to a permeable bedding of ceramic material having a barrier, and brought to the molten state, preferably to at least about 700.degree. C., in order to form the net shape aluminum matrix composite by infiltration. In addition to magnesium, auxiliary alloying elements may be employed with aluminum. The resulting composite products may contain a discontinuous aluminum nitride phase in the aluminum matrix.Type: GrantFiled: August 24, 1992Date of Patent: January 11, 1994Assignee: Lanxide Technology Company, LPInventors: Michael K. Aghajanian, Terry D. Claar
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Patent number: 5273569Abstract: A composite has a magnesium base metal matrix and a reinforcing phase. The composite is produced from a charge containing a rapidly solidified magnesium base alloy and particles of a reinforcing material present in an amount ranging from about 0.1 to 50 percent by volume of the charge. Ball milling the charge energetically enfolds metal matrix material around each of the particles, while maintaining the charge in a pulverant state. Consolidation of the charge provides a mechanically formable, substantially void-free mass.Type: GrantFiled: November 9, 1989Date of Patent: December 28, 1993Assignee: Allied-Signal Inc.Inventors: Paul S. Gilman, Michael S. Zedalis
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Patent number: 5273831Abstract: Composite structures having a higher density, stronger reinforcing niobium based alloy embedded within a lower density, lower strength niobium based cladding alloy are provided. The cladding is preferably an alloy having a niobium and titanium base according to the expression:Nb.sub.balance -Ti.sub.27-40.5 -Al.sub.4.5-10.5 -Hf.sub.1.5-5.5 V.sub.0-6 Cr.sub.4.5-8.5 Zr.sub.0-1 C.sub.0-0.5,where each metal of the metal/metal composite has a body centered cubic crystal structure, andwherein the ratio of concentrations of Ti to Nb (Ti/Nb) is greater than or equal (.gtoreq.) to 0.5, andwherein the maximum concentration of the Hf+V+Al+Cr additives is less than or equal (.ltoreq.) to the expression:16.5+5.times.Ti/Nb.The reinforcement may be in the form of plates, sheets or rods of the higher strength, higher temperature niobium based reinforcing alloy. The same crystal form is present in both the matrix and the reinforcement and is specifically body centered cubic crystal form.Type: GrantFiled: September 30, 1992Date of Patent: December 28, 1993Assignee: General Electric CompanyInventors: Melvin R. Jackson, Mark G. Benz, John R. Hughes
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Patent number: 5270122Abstract: Composite structures having a higher density, stronger reinforcing niobium based alloy embedded within a lower density, lower strength niobium based alloy are provided. The matrix is preferably an alloy having a niobium and titanium base according to the expression:Nb.sub.balance --Ti.sub.31-48 --Al.sub.8-21.The reinforcement may be in the form of strands of the higher strength, higher temperature niobium based alloy. The same crystal form is present in both the matrix and the reinforcement and is specifically body centered cubic crystal form.Type: GrantFiled: January 2, 1992Date of Patent: December 14, 1993Assignee: General Electric CompanyInventors: Mark G. Benz, Melvin R. Jackson, John R. Hughes
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Patent number: 5268043Abstract: There is provided a magnetic device having first and second portions with different magnetic coercivities. A magnetic field is induced in both the first and second portion. When exposed to a sufficiently high external magnetic field, the polarity of the first portion reverses generating a voltage pulse which may be detected by an external sensor. Either the first or second portion, or both, is formed from a copper alloy containing dispersed magnetic phase.Type: GrantFiled: August 2, 1991Date of Patent: December 7, 1993Assignee: Olin CorporationInventor: Charles J. McCowen
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Patent number: 5264295Abstract: The invention provides an improved combined body of ceramics and metal which maintains high anti-torsional strength and anti-slip off strength while stress concentration is relaxed and deterioration of the ceramics is well prevented. The combined body includes a ceramic member inserted into and firmly engaged with a recess or an opening of a metal member. The combined body has a treated surface region in the vicinity of an engagement end of a contact surface of either the ceramic member or the metal member, and an untreated surface region at a location other than the vicinity of the engagement end.Type: GrantFiled: June 9, 1993Date of Patent: November 23, 1993Assignee: NGK Spark Plug Co., Ltd.Inventors: Takaya Yoshikawa, Noboru Ishida
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Patent number: 5264293Abstract: Composite structures having a higher density, stronger reinforcing niobium based alloy embedded within a lower density, lower strength niobium based alloy are provided. The matrix is preferably an alloy having a niobium and titanium base according to the expression:Nb-Ti.sub.35-45- Hf.sub.10-15,and the reinforcement may be in the form of strands of the higher strength, higher temperature niobium based alloy. The same crystal form is present in both the matrix and the reinforcement and is specifically body centered cubic crystal form.Type: GrantFiled: January 2, 1992Date of Patent: November 23, 1993Assignee: General Electric CompanyInventors: Mark G. Benz, Melvin R. Jackson, John R. Hughes
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Patent number: 5260141Abstract: A method is provided for preparing a diamond coating on a substrate. The method includes a first step of applying a partial diamond coating having an effective amount of void area therein to the work surface of a substrate. In a follow-up step the void area in the partial coating is filled with binder, preferably metallic binder. In a later step, diamond projecting outwardly from the binder is further grown, to generate a covering portion or a head portion extending over, and in protective relationship with, the binder or binder material. According to the present invention preferred products are also provided.Type: GrantFiled: November 29, 1991Date of Patent: November 9, 1993Assignee: Regents of the University of MinnesotaInventors: Chung-hsien Tsai, John C. Nelson, Joachim V. R. Heberlein, Emil Pfender, William W. Gerberich
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Patent number: 5260137Abstract: Reinforced metallic or intermetallic alloy matrix composite materials which are reinforced by the incorporation of preferably small-diameter ceramic fibers infiltrated within a metal bonding layer. The bonding layer comprises a foil, such as copper, which forms a molten eutectic alloy with the major metal of the matrix alloy, such as titanium, and infiltrates the fibers to form a unitary reinforced composite.Type: GrantFiled: November 19, 1991Date of Patent: November 9, 1993Assignee: Avco CorporationInventors: Dan G. Rosenthal, Donald E. Larsen, Jr.
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Patent number: 5252147Abstract: The surface properties of copper-refractory metal (CU-RF) alloy bodies are modified by heat treatments which cause the refractory metal to form a coating on the exterior surfaces of the alloy body. The alloys have a copper matrix with particles or dendrites of the refractory metal dispersed therein, which may be niobium, vanadium, tantalum, chromium, molybdenum, or tungsten. The surface properties of the bodies are changed from those of copper to that of the refractory metal.Type: GrantFiled: February 11, 1991Date of Patent: October 12, 1993Assignee: Iowa State University Research Foundation, Inc.Inventors: John D. Verhoeven, Edwin D. Gibson
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Patent number: 5246056Abstract: The present invention relates to alloys having substantially uniform aggregate distribution, a method of making such alloys, and centrifugally cast members made from such alloys. The alloys of the present invention utilize aggregates of tungsten carbide, vanadium carbide and titanium carbide so formulated to allow them to be uniformly distributed throughout the alloy matrix.Type: GrantFiled: June 10, 1991Date of Patent: September 21, 1993Assignee: Bimex CorporationInventors: Donald P. Lomax, Gregory N. Patzer, Giri Rajendran
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Patent number: 5244747Abstract: Thermoplastic cores reinforced with strong magnetic shots or/and particles are molded and then thermosets are molded around this thermoplastic core. The thermoplastic core is decored by a magnet at a high temperature above the softening point of thermoplastic matrix to produce a hollow curved internal space.Type: GrantFiled: November 13, 1989Date of Patent: September 14, 1993Assignee: Bauer Hammar International, Inc.Inventor: Jeong M. Lee
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Patent number: 5244748Abstract: A fiber coating which allows ceramic or metal fibers to be wetted by molten metals is disclosed. The coating inhibits degradation of the physical properties caused by chemical reaction between the fiber and the coating itself or between the fiber and the metal matrix. The fiber coating preferably includes at least a wetting layer, and in some applications, a wetting layer and a barrier layer between the fiber and the wetting layer. The wetting layer promotes fiber wetting by the metal matrix. The barrier layer inhibits fiber degradation. The fiber coating permits the fibers to be infiltrated with the metal matrix resulting in composites having unique properties not obtainable in pure materials.Type: GrantFiled: January 27, 1989Date of Patent: September 14, 1993Assignee: Technical Research Associates, Inc.Inventors: Joseph K. Weeks, Jr., Chantal Gensse
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Patent number: 5240495Abstract: In situ formation of metal-ceramic oxide microstructures is carried out on a starting oxide phase containing at least a most noble metallic component (e.g., iron) and a least noble metallic component (e.g. manganese) and subjecting the starting oxide phase to a temperature and oxygen partial pressure and for a time period to cause reduction of only part of the most noble metallic component to elemental metal.Type: GrantFiled: April 2, 1992Date of Patent: August 31, 1993Assignee: Cornell Research Foundation, Inc.Inventors: Rudiger Dieckmann, Stephen L. Sass
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Patent number: 5232525Abstract: A method to increase the fracture resistance of titanium alloy matrix composites which comprises thermally treating a composite at a temperature about 5 to 10% above the beta-transus temperature of the alloy for about 4 to 60 minutes.Type: GrantFiled: March 23, 1992Date of Patent: August 3, 1993Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Paul R. Smith, Daniel Eylon
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Patent number: 5231269Abstract: An electromagnetic wave energy conversion heat-generating material comprising zinc oxide whisker used as a heat-generating material. A heating container for an electronic oven, comprising the zinc oxide whiskers, and a microwave oven provided with a heat generator comprising the zinc oxide whiskers. The present electromagnetic wave energy conversion heat-generating material generates heat upon exposure to microwaves. In a preferred embodiment, the zinc oxide whiskers include a central part and needle crystal projections extending from the central part in plural, preferable four, different axial directions.Type: GrantFiled: February 15, 1990Date of Patent: July 27, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsumasa Oku, Kohei Shiota
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Patent number: 5227249Abstract: The subject invention relates to a coated reinforcement material comprising a SiC reinforcement having an outer core coating of the general formula:Ti.sub.x M.sub.y B.sub.zwherein M is at least one of V, Nb, Ta, Cr, Mo, W, Zr, and Hf; x is between about 30 and 60 atomic percent; y is between about 5 and 30 atomic percent; z is between about 35 and 60 atomic percent; and x+y+z=100. The invention further relates to a high strength, high temperature performance composite comprising a ternary boride coated SiC reinforcement material and titanium alloy matrix material.Type: GrantFiled: October 3, 1991Date of Patent: July 13, 1993Assignee: Standard Oil CompanyInventors: D. Lukco, M. A. Tenhover
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Patent number: 5224030Abstract: Gas derived graphite fibers generated by the decomposition of an organic gas are joined with a suitable binder. This produces a high thermal conductivity composite material which passively conducts heat from a source, such as a semiconductor, to a heat sink.The fibers may be intercalated. The intercalate can be halogen or halide salt, alkaline metal, or any other species which contributes to the electrical conductivity improvement of the graphite fiber.The fibers are bundled and joined with a suitable binder to form a high thermal conductivity composite material device. The heat transfer device may also be made of intercalated highly oriented pyrolytic graphite and machined, rather than made of fibers.Type: GrantFiled: May 11, 1992Date of Patent: June 29, 1993Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Bruce A. Banks, James R. Gaier
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Patent number: 5223052Abstract: A method treating a surface of rotors in a screw-type rotary fluid machine, with the method comprising the steps of: conducting a non-electrolytic Ni plating on the surface of each rotor so as to form a first layer of non-electrolytic Ni plating layer; heating the rotor having the first layer at a temperature not lower than 500.degree. C.; and forming, at least, a second layer of an organic resin so as to cover the first layer.Type: GrantFiled: April 3, 1991Date of Patent: June 29, 1993Assignee: Hitachi, Ltd.Inventors: Akihiko Yamamoto, Toshihiro Yamada, Tatsuo Natori, Kotaro Naya, Motohiro Satoo, Mitsuru Fujiwara, Katsumi Matsubara, Kazuaki Shiinoki, Hirotaka Kameya
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Patent number: 5223347Abstract: A fabrication method of strengthening metallic alloys by composite technology has been developed by mixing steel shots or aggregates with conventional alloys, thus preventing cold flow or creep. Preventing creep is advantageous in thermal plugs which must withstand fluid pressure without leakage until subjected to dangerous temperatures such as caused by fire. The matrix alloy primarily consists of some or all of copper, magnesium, bismuth, tin, lead, cadmium, and indium and the particle material is preferably iron or steel. New alloys exhibit a higher strength against a hydrostatic gas pressure than that of conventional matrix phase containing no reinforcing particles, while maintaining the melting temperature of new alloys in the same range of conventional unreinforced matrix alloy. The mixing of steel particles with the matrix is achieved by employing a flux such as ammonium chloride.Type: GrantFiled: July 26, 1991Date of Patent: June 29, 1993Assignee: Composites Technology International, Inc.Inventors: Chang Lhymn, Yoon O. Lhymn
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Patent number: 5217815Abstract: A metal matrix composite is produced by forming a rapidly solidified aluminum base alloy into wire. The wire is arc sprayed onto at least one substrate having thereon a fiber reinforcing material to form a plurality of preforms. Each of the preforms has a layer of the alloy deposited thereon, and the fiber reinforcing material is present in an amount ranging from about 0.1 to 75 percent by volume thereof. The preforms are bonded together to form an engineering shape.Type: GrantFiled: December 6, 1990Date of Patent: June 8, 1993Assignee: Allied-Signal Inc.Inventors: Santosh K. Das, Michael S. Zedalis, Paul S. Gilman
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Patent number: 5217816Abstract: A method is taught for the in-situ precipitation of ceramic materials in a metal matrix. By means of the solvent assisted reaction, metal-ceramic composites having highly superior properties may be obtained. The invention involves the reaction of the ceramic forming constituents in a metal solvent medium to provide very finely-dispersed ceramic particles in the metal matrix. Exemplary materials include titanium diboride in an aluminum matrix.Type: GrantFiled: September 4, 1991Date of Patent: June 8, 1993Assignee: Martin Marietta CorporationInventors: John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
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Patent number: 5215831Abstract: A beta phase nickel aluminide microalloyed with iron having improved ductility. Nickel aluminide intermetallics alloyed with no more than about 0.5 atomic percent iron have significantly improved room temperature ductility over conventional unalloyed beta phase nickel aluminides or beta phase nickel aluminides alloyed with higher percentages of iron.Type: GrantFiled: March 4, 1991Date of Patent: June 1, 1993Assignee: General Electric CompanyInventors: Ramgopal Darolia, David F. Lahrman, Robert D. Field
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Patent number: 5207842Abstract: The present invention relates to novel materials based on silver and tin oxide for the production of electrical contacts as well as the electrical contacts thus produced. According to the invention, these materials contain at least 6% by weight of tin oxide and from 0.02 to 5% by weight of tellurium oxide; the total content by weight of metal oxides, with the exclusion of tellurium oxide, does not exceed 15%, the balance being made up by silver. Application: manufacture of electrical equipment.Type: GrantFiled: October 23, 1990Date of Patent: May 4, 1993Assignee: Comptoir Lyon-Alemand LouyotInventors: Jean-Paul Guerlet, Dan Weber, Sophie Coupez, Claude Lambert
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Patent number: 5196273Abstract: A tantalum carbide composite material comprises a tantalum carbide preform infiltrated with a low melting temperature metal selected from aluminum, copper, various alloys of either aluminum or copper, gold and silver.Type: GrantFiled: May 13, 1991Date of Patent: March 23, 1993Assignee: Noranda Inc.Inventors: Peter Tsantrizos, Lakis T. Mavropoulos, Kartik Shanker, Robin A. L. Drew, Bruce Henshaw, Raynald Lachance
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Patent number: 5187021Abstract: Diamond and ceramic whiskers 712 are grown on diamond, ceramic, or metal coated 714 fibers 710 (e.g. carbon, glass, ceramic or metal fibers) and used in composites 700. The whiskers 712 1) increase fiber-matrix bonding, 2) maintain fiber separation and 3) provide uniform fiber distribution. The coating 714 1) improves the mechanical properties of the fiber and 2) protects the fiber 710 from corrosive attack by the matrix material 720. A catalytic process for growing whiskers 712 allows fiber strength to be maintained during the whisker growth process. Composite materials made with whiskered or coated and whiskered fibers are useful whenever light-weight and high strength materials are required.Type: GrantFiled: February 8, 1989Date of Patent: February 16, 1993Assignee: Diamond Fiber Composites, Inc.Inventors: Jacob Vydra, Anatoly Altshuler
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Patent number: 5185216Abstract: Disclosed is a composite plating film for sliding members, essentially containing at least one of the alloy elements selected from tin, indium, antimony, and copper; inorganic particles; and lead; the composition of the composite plating film being:a) at least one of the alloy elements selected from tin, indium, antimony, and copper . . . 2 to 30 weight % in total;b) inorganic particles . . . 0.3 to 25 volume %; andc) lead . . . the balance.Type: GrantFiled: August 29, 1990Date of Patent: February 9, 1993Assignees: Daido Metal Company Ltd., C. Uyemura & Company, Ltd.Inventors: Tadashi Tanaka, Masaaki Sakamoto, Motomu Wada, Hideo Ishikawa, Sowjun Matsumura, Tadashi Chiba, Kiyoshi Asakawa, Syoichi Oohora
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Patent number: 5174368Abstract: The structure consists of a composite material having a reinforcement texture and a matrix. The composition of the matrix varies practically without discontinuity, in the structure's thickness direction, from an essentially refractory material (13) in the region of the front face intended to be exposed to very high temperatures, up to a material that is essentially heat conductive (16). Cooling fluid circulation conduits (15) can be arranged within the structure at a portion where the matrix is essentially heat conductive.Type: GrantFiled: July 10, 1991Date of Patent: December 29, 1992Assignee: Societe Europeenne de PropulsionInventors: Didier P. Boury, Louis G. Heraud
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Patent number: 5174834Abstract: A process of production of alumina short fiber reinforced magnesium or magnesium alloy product features formation of alumina short fiber pre-form utilizing a inorganic binder which is composed of one or more oxides having thermodynamically stability equivalent to or higher than MgO. In the alternative, the composite almina fiber and binder surfaces of the alumina short fiber pre-form can be coated by a baked coating layer. Pressure casting of molten magnesium or magnesium alloy is then performed for forming the final products.Type: GrantFiled: January 10, 1991Date of Patent: December 29, 1992Assignees: Nissan Motor Company, Limited, Nichias CorporationInventors: Harumichi Hino, Mikiya Komatsu, Kenichi Shibata, Mitsushi Wadasako, Junichi Ogawa
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Patent number: 5175133Abstract: A calcined microsphere of ultrafine bauxite particles having a mean particle size in the range 0.01 to 0.3 micrometers, said microsphere having a particle size less than 30 micrometers and being characterized by a substantially solid form having a pycnometric density substantially falling in the range 3.2-3.9 g/cm.sup.3, a BET surface area substantially falling in the range 0.05 to 0.5 m.sup.2 /g and a crystal grain size less than 4 micrometers, the surface chemistry of the microsphere being modified to enhance the wettability of the microsphere and to improve its ability to bond strongly with matrix materials in use.Type: GrantFiled: December 21, 1990Date of Patent: December 29, 1992Assignee: Comalco Aluminium LimitedInventors: Thomas K. Smith, Raymond W. Shaw, Christopher J. Heathcock, Leslie C. Edwards, Malcolm J. Couper, Kenong Xia
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Patent number: 5166004Abstract: A composite material (20) comprises a matrix layer (21) having a plurality of interspersed reinforcing whiskers (23) and a plurality of continuous reinforcing fibers (25) embedded within the matrix layer (21). The preferred embodiment includes a matrix layer (21) which may be a ceramic, intermetallic or metallic material having interspersed reinforcing whiskers (23) upon which a second layer of the matrix (24) having embedded continuous reinforcing fibers (25) is placed, and a third layer (22) of the matrix material having the interspersed reinforcing whiskers (23) on the second layer (24). The composite exhibits improved fracture toughness due to the crack deflection ability of whiskers (23) and crack bridging and fiber pull out due to continuous fibers (25) and minimizes creep associated with known ceramic and intermetallic composites.Type: GrantFiled: July 8, 1991Date of Patent: November 24, 1992Assignee: Southwest Research InstituteInventors: Animesh Bose, James Lankford, Richard Page, Cheryl Blanchard
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Patent number: 5162159Abstract: Coated reinforcement material for metal matrix composites comprising a carbon or silicon-containing reinforcement having a coating of the general formula:A.sub.100-x M.sub.xwherein A is at least one of Y, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; M is at least one of Mo, W or Re; and x is from about 10 to about 90.Type: GrantFiled: November 14, 1991Date of Patent: November 10, 1992Assignee: The Standard Oil CompanyInventors: Michael A. Tenhover, Dorothy Lukco
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Patent number: 5158917Abstract: A method of producing shaped, self-supporting ceramic bodies includes preparing a mold by applying a permeable, conformable material to a shape-defining surface of an expendable pattern. The permeable, conformable material, when set or stable, provides a mold with a shaped surface which is defined by, and is therefore substantially congruent to, the shape-defining surface. Upon heating, the material of the expendable pattern combusts or volatilizes and thus establishes the shaped cavity mold. A molten parent metal is then vaporized with a vapor-phase oxidant in such a manner as to form a ceramic body which grows into the mold cavity, and is shaped by it. The ceramic body is recovered from the mold having a shaped surface replicating the shape-defining surface of the expandable pattern.Type: GrantFiled: October 5, 1990Date of Patent: October 27, 1992Assignee: Lanxide Technology Company, LPInventor: E. Allen LaRoche, Jr.
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Patent number: 5156923Abstract: Layers of copper and Invar are cold pressure rolled with reduction in thickness to be metallurgically bonded together in interleaved relation, and strips of the bonded materials are cold pressure rolled together a plurality of times with reduction in thickness to be metallurgically bonded together to form a metal composite and to break up the layers of Invar in the composite, thereby to distribute portions of the Invar material in a copper matrix to limit thermal expansion of the composite while permitting the matrix to extend in continuous phase along three mutually perpendicular axes through the composite substantially free of diffusion between the copper and Invar materials.Type: GrantFiled: January 6, 1992Date of Patent: October 20, 1992Assignee: Texas Instruments IncorporatedInventors: Sunil C. Jha, James A. Forster
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Patent number: 5154984Abstract: The present invention relates to a metal-ceramic composite for use in a high temperature and a abrasion-resisting member such as a supporting member of a heating furnace having a construction, in which ceramic particles having superior abrasion resistance and heat resistance are dispersed in a metallic matrix having superior toughness or ceramic blocks are buried in a metallic surface, whereby the characteristics of a ceramic and a metal are simultaneously utilized. A metal-ceramic composite superior in physical characteristic, such as abrasion resistance and heat resistance, and a method of producing the same are provided.Type: GrantFiled: December 6, 1991Date of Patent: October 13, 1992Assignee: Sumitomo Metal Industries, Ltd.Inventors: Yoshiyasu Morita, Manabu Seguchi, Kazuo Okamura, Fuminori Hikami, Koichiro Ishihara, Katsutoshi Hara
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Patent number: 5147728Abstract: Novel Ag-SnO electrical contact materials are disclosed, which are made of Ag alloys consisting of 5-20 weight % of Sn and a balance of Ag, the alloys having been prepared by melting and having been internal oxidized. Novel manufacturing methods are also disclosed, in which internal-oxidation is conducted in an oxygen atmosphere of 10 atm to 200 atm, and at a temperature of 750.degree. C. to 500.degree. C.Type: GrantFiled: July 5, 1991Date of Patent: September 15, 1992Inventors: Seiichi Tanaka, Teruo Hirata, Masaharu Yida
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Patent number: 5145513Abstract: A process for the preparation of composite materials consisting essentially of an oxide phase and a metal phase is effected by grinding a mixture of at least one oxide precursor of the metal phase of the composite with at least one reducing agent, the reducing agent being a precursor of the oxide phase. The grinding being performed in a high energy mechanical grinder for a sufficient length of time so that at least 80 percent of the oxide precursor is reduced to metal or to a metal alloy. The process is particularly valuable for the preparation of oxide/metal composite materials which have improved mechanical, electrical or radiation absorption properties.Type: GrantFiled: April 12, 1991Date of Patent: September 8, 1992Assignee: Centre National de le Recherche ScientifiqueInventors: Paolo Matteazzi, Gerard Le Caer, Elizabeth Grosse-Bauer
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Patent number: 5143795Abstract: A magnesium based metal matrix composite is made from rapidly solidified magnesium alloy powder and SiC particulate using liquid suspension coprocessing or mechanical alloying. The composite is suitable for consolidation into bulk shapes having, in combination, high strength, high stiffness, low density, low coefficient of thermal expansion, and high hardness. The composite is suited for uses in such applications as space and missile guidance and navigation and control system precision components where low density, very high specific stiffness and long term dimensional and environmental stability are principal performance criteria.Type: GrantFiled: February 4, 1991Date of Patent: September 1, 1992Assignee: Allied-Signal Inc.Inventors: Santosh K. Das, Chin-Fong Chang, Derek Raybould
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Patent number: 5141819Abstract: A net shaped ceramic-reinforced aluminum matrix composite is formed by forming a permeable mass of ceramic material with a defined surface boundary having a barrier, and contracting a molten aluminum-magnesium alloy with the permeable mass of ceramic material in the presence of a gas comprising from about 10 to 100% nitrogen, by volume, balance nonoxidizing gas, e.g. hydrogen or argon. Under these conditions, the molten alloy spontaneously infiltrates the ceramic mass under normal atmospheric pressures until it reaches the barrier. A solid body of the alloy can be placed adjacent to a permeable bedding of ceramic material having a barrier, and brought to the molten state, preferably to at least about 700.degree. C., in order to form the net shape aluminum matrix composite by infiltration. In addition to magnesium, auxiliary alloying elements may be employed with aluminum. The resulting composite products may contain a discontinuous aluminum nitride phase in the aluminum matrix.Type: GrantFiled: February 19, 1991Date of Patent: August 25, 1992Assignee: Lanxide Technology Company, LPInventors: Michael K. Aghajanian, Terry D. Claar
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Patent number: 5141821Abstract: MCrAlY composite material with platinum and/or rhodium alloying elements as 5-15 wt. % thereof and containing included particles of carbides vanadium, niobium, tantalum, titanium, zirconium, hafnium, chromium, molybdenum and/or tungsten and/or mixtures thereof, enhancing the corrosion- and wear-resistance of such materials at high temperatures.Type: GrantFiled: May 29, 1990Date of Patent: August 25, 1992Assignee: Hermann C. Starck Berlin GmbH & Co KGInventors: Erich Lugscheider, Heinz Eschnauer, Johannes Wilden, Frank Buche, Helmut Meinhardt
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Patent number: 5137792Abstract: A laminate material or workpiece with a backing layer and a functional layer, in particular a friction bearing layer, with the structure of a solid but fusible dispersion with a matrix and at least one component which is dispersed in the matrix and which at least in the solid condition is insoluble in the material of the matrix or is soluble only in an amount which is smaller than the amount present, or with the structure of a substantially fusible mixture which is fixedly combined in itself and which can be used for tribological purposes, of components which are not soluble in each other or which are soluble only in an amount which is smaller than the amount present, possibly partially in crystal-like form, is transformed at the exposed surface of the functional layer into another structure in respect of the dispersion alloy or the mixture by melting and extremely rapid cooling from the molten condition, so that fine globular distribution of the undissolved components occurs and the material of the surface rType: GrantFiled: December 20, 1989Date of Patent: August 11, 1992Assignee: Glyco AktiengesellschaftInventors: Erich Hodes, Ulrich Engel
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Patent number: 5134038Abstract: A magnetic storage medium is composed of a non-wettable substrate upon which a transient liquid metal layer is deposited and maintained as a distribution of discontinuous liquid features. A magnetic film layer is deposited on the transient liquid metal layer resulting in a reaction of the liquid metal with the magnetic film. The topology of the magnetic film is controllable by adjusting the thickness of the transient liquid metal layer.Type: GrantFiled: September 4, 1991Date of Patent: July 28, 1992Assignee: International Business Machines CorporationInventors: Robert J. Baseman, Christopher V. Jahnes, Igor Y. Khandros, Seyyed M. T. Mirzamaani, Michael A. Russak
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Patent number: 5134039Abstract: The present invention provides a process for the electroless plating of easily reducible metals onto ultrafine, usually inert, particles. Such plating is achieved through careful and accurate control of such parameters as the feed rates of the various solutions, the control of pH of the solution, the temperature, pressure and the rate of agitation of the solution in which the plating is taking place. The plated ultrafine composite particles and the powders made from the particles produced by the process are also a part of the invention. There is also provided a metal article of manufacture consisting of a metal such as copper, silver, gold, ruthenium, rhodium, palladium, osmium and platinum with a plurality of spherical shaped ultrafine particles with a diameter of less than about 10 microns dispersed substantially evenly through the metal article.Type: GrantFiled: June 11, 1990Date of Patent: July 28, 1992Assignee: Leach & Garner CompanyInventors: Guy B. Alexander, Ravindra A. Nadkarni
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Patent number: 5132278Abstract: A superconducting composite material comprising a superconducting element, coated on its exterior surface with noble or inert metal, in a conductive metal matrix which includes nonsuperconducting fibers. The superconducting element may suitably comprise a filament of 123 metal oxide high temperature superconductor (MOHTSC) material, or other metal oxide superconductive material. The composite structure of the invention overcomes the inherent brittleness of metal oxide-type superconductive materials and the sensitivity to flaws to which MOHTSC materials are suceptible. The noble or inert metal and conductive matrix metal may suitably be applied by MOCVD techniques. A preferred form of the superconducting article of the present invention is a tape comprising a generally planar array of superconductive filaments, for applications such as energy storage devices, power transmission and propulsion systems that require large magnetic fields, transformers, motors, and generators.Type: GrantFiled: May 11, 1990Date of Patent: July 21, 1992Assignee: Advanced Technology Materials, Inc.Inventors: Ward C. Stevens, David S. Kurtz
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Patent number: 5130209Abstract: A metal matrix composite is produced by rapidly solidifying an aluminum base alloy directly into wire. The wire is arc sprayed onto at least one substrate having thereon a fiber reinforcing material to form a plurality of preforms. Each of the preforms has a layer of the alloy deposited thereon, and the fiber reinforcing material is present in an amount ranging from about 0.1 to 75 percent by volume thereof. The preforms are bonded together to form an engineering shape.Type: GrantFiled: July 12, 1991Date of Patent: July 14, 1992Assignee: Allied-Signal Inc.Inventors: Santosh K. Das, Michael S. Zedalis, Paul S. Gilman
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Patent number: 5120612Abstract: A method of casting a copper based composite which includes a second phase ceramic particles. A copper or copper based alloy containing a eutectic reactive element is spray cast with the ceramic particles being injected into the spray cast stream of material prior to its being deposited onto the moving substrate. The eutectic reactive element diffuses into the ceramic particles and provides a good bond between the copper based matrix and the second phase ceramic particles. The ceramic particles may be selected from the group consisting of oxides, borides, nitrides, carbides and mixtures thereof. The eutectic reactive materials may include zirconium, chromium, titanium, aluminum and magnesium.Type: GrantFiled: September 4, 1990Date of Patent: June 9, 1992Assignee: Olin CorporationInventor: Sankaranarayanan Ashok