Base Metal One Or More Of Copper(cu) Or Noble Metal Patents (Class 75/247)
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Patent number: 4863514Abstract: There is provided a material for dentures having metallic matrix, containing 0.5-30 volume % glass having a softening temperature above 650.degree. C. and/or ceramic particles having a maximum grain size of 40 .mu.m.Type: GrantFiled: February 8, 1989Date of Patent: September 5, 1989Assignee: Degussa AtiengesellschaftInventors: Werner Groll, Josef Rothaut
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Patent number: 4855102Abstract: A sintering method and fusion welding method of the present invention are characterized in that energy is radiated to the black component of starting materials so as to convert it from the state of an energy absorber to the state of an energy reflector (the state where metallic luster is exhibited). The methods can be utilized effectively for forming the electrode of a sensor or the bump of an electronic component. When applied to the production of the sensor and the electrode, the methods can produce these products by a simple production process and with extremely high producibility.Type: GrantFiled: March 21, 1988Date of Patent: August 8, 1989Assignee: Hitachi, Ltd.Inventors: Ryoji Okada, Mitsuaki Haneda, Takeshi Araya, Susumu Hioki
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Patent number: 4836979Abstract: A method of producing a composite material from a mixture of copper and a low coefficient of thermal expansion nickel-iron alloy (Invar) powder is disclosed wherein advantageously at least part of the copper is deposited on the Invar powder prior to processing. Processing includes cold compacting to a green strip or other configuration, annealing in the temperature range of 550.degree.-750.degree. C. and working the annealed material at a temperature in that range to high density.Type: GrantFiled: June 14, 1988Date of Patent: June 6, 1989Assignee: Inco LimitedInventors: James A. E. Bell, Thijs Eerkes, Carlos M. Diaz, William L. Mankins
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Patent number: 4818283Abstract: A process for producing a dispersion hardened copper alloy includes admixing to a copper melt from 0.3 to 15 weight % of molybdenum to provide a mixture which is a melt; superheating the mixture to a temperature ranging from about 200.degree. C. to about 1000.degree. C. above the melting point of coper to provide a superheated melt; and subjecting the superheated melt to very rapid solidification at a cooling rate ranging from 104.degree. to 106.degree. C./sec. The above process produces dipsersion hardened copper alloy comprising copper and from 1 to 15 weight % of molybdenum which is present in the dispersion hardened copper alloy as particles having a diameter of less than 0.1 .mu.m embedded in the copper matrix. Such dispersion hardened copper alloys are useful for providing electrical conductors which are subjected to elevated temperatures, such as for providing spot welding electrodes, particularly for welding of zinc-galvanized sheet metal.Type: GrantFiled: October 16, 1987Date of Patent: April 4, 1989Assignee: Battelle-Institut e.V.Inventors: Karl-Heinz Grunthaler, Dieter Langbein, Fehmi Nilmen, Heinrich Winter
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Patent number: 4810289Abstract: A process of hot isostatic pressing of powders to form electrical contacts is characterized by the steps: (A) mixing powders, 1 in the Drawing, from metal containing powder or metal containing powder plus carbon powder, where at least one of Ag and Cu is present, (B) thermal cleaning treatment of the powder, 2 in the Drawing, (C) granulating the thermally treated powder, 3 in the Drawing, (D) uniaxially pressing the powders without heating, 5 in the Drawing, to provide a compact, (E) placing at least one compact in a pressure-transmitting, pressure-deformable container, 6 in the Drawing, and surrounding each compact with fine particles of a separating material, (F) evacuating air from the container, 7 in the Drawing, (G) sealing the compacts inside the container, 8 in the Drawing, (H) hot isostatic pressing, 9 in the Drawing, the compacts through the pressure transmitting material at a pressure from 352 kg/cm.sup.2 to 2,115 kg/cm.sup.2 and a temperature from 0.5.degree. C. to 100.degree. C.Type: GrantFiled: April 4, 1988Date of Patent: March 7, 1989Assignee: Westinghouse Electric Corp.Inventors: Norman S. Hoyer, Natraj C. Iyer
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Patent number: 4799955Abstract: Disclosed is a composite metal powder made from a base iron powder milled with an alloying component such as nickel, copper, managnese, chromium, silicon, phosphorus, boron, vanadium, and molybdenum, where the composite metal powder has a compressibility comparable to the compressibility of the soft base iron powder prior to milling. Such a composite is obtained by using a short mill time followed by an annealing step.Type: GrantFiled: October 6, 1987Date of Patent: January 24, 1989Assignee: Elkem Metals CompanyInventor: Melvin L. McClellan
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Patent number: 4781980Abstract: The present invention provides a copper powder for use in a conductive paste which allows the paste to possess excellent initial electrical conductivity, thermal resistance, and humidity resistance, and which enables the paste to maintain stable electrical conductivity for a long period of time. The copper powder of the present invention comprises a raw material copper powder; an anti-oxidization film comprising an organic acid salt of a higher aliphatic amine which is formed on the surface of the copper powder; and a surface film which comprises 0.2 to 10 parts by weight of a dispersing agent of a boron-nitrogen composite type and 0.1 to 10 parts by weight of at least one coupling agent of the group consisting of isopropyl-triisostearoyl-titanate and aceoalkoxy-aluminum-diisopropylate, relative to 100 parts by weight of the copper powder, and which is formed on the anti-oxidization film.Type: GrantFiled: March 23, 1987Date of Patent: November 1, 1988Assignee: Fukuda Metal Foil & Powder Co., Ltd.Inventors: Masayoshi Yoshitake, Shigeru Kito, Jiro Yamamoto
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Patent number: 4775414Abstract: Inorganic adhesives suitable for bonding metals to metals, metals to ceramics, or ceramics to ceramics with high bonding strength are disclosed, which contain a composite mechanical alloy powder comprising:(a) from about 10 to 60 wt % of particles of at least one of Cu and Ni;(b) from about 10 to 80 wt % of particles of at least one of Ti, Nb, and Zr; and(c) from about 10 to 80 wt % of Ag particles.The composite powder can be dispersed in an organic solvent to form a paste adhesive.Type: GrantFiled: June 26, 1987Date of Patent: October 4, 1988Assignee: Showa Denko Kabushiki KaishaInventor: Takashi Shoji
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Patent number: 4769071Abstract: There is provided a process for infiltrating a compacted ferrous powder metal body with copper or a copper alloy which process is characterized by presintering the ferrous metal body at a temperature of from about 1875.degree. F. to a temperature below the melting point of the infiltrant, and then in the same furnace, raising the temperature above the melting point of the copper or copper alloy infiltrant for a period sufficient to infiltrate the powder metal body. This process is more economical than the prior double run infiltration processes and provides excellent impact strengths and tensile strengths.Type: GrantFiled: August 21, 1987Date of Patent: September 6, 1988Assignee: SCM Metal Products, IncInventors: Erhard Klar, Mark Svilar
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Patent number: 4766274Abstract: A powdered metallurgical procedure for forming chromium copper contacts used in vacuum circuit interrupters, in which prealloyed powder formed by mixing to copper, chromium of between two to thirty-seven weight percent is rapidly solidified after melting at about 1100.degree. C. to 1500.degree. C. This powder may be blended with additional chromium of between 12 to 50 weight percent with a maximum of fifty-five weight percent of chromium in the final contact structure. This blended mixture may then be either (i) cold pressed at 100,000 psig. and vacuum sintered at 800.degree. to 1400.degree. C.; or (ii) be subjected to hot isostatic pressure of 10,000 to 30,000 psig. at between 700.degree. C. to 1080.degree. C.; or (iii) containing the blended copper-chromium powder and the additional chromium powder into an evacuated can and hot extruding the can between 400.degree. C. to 900.degree. C., to form the contacts.Type: GrantFiled: January 25, 1988Date of Patent: August 23, 1988Assignee: Westinghouse Electric Corp.Inventors: Natraj C. Iyer, Alan T. Male, Sidney J. Cherry, Robert E. Gainer
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Patent number: 4764227Abstract: Contact materials based on AgSnO.sub.2 and having Bi.sub.2 O.sub.3 and CuO as further metal oxide additives were previously disclosed. In these materials the total content of all metal oxides was supposed to be between 10 and 25% by volume with the SnO.sub.2 share equal to or greater than 70% by volume of the total amount of oxide.According to this invention the quantity of SnO.sub.2 is kept smaller than 70% by volume; specifically at about 65%, but in any case equal to or greater than 50%. The SnO.sub.2 weight content is to be in the 4% to 8% range and the weight percentage ratio of SnO.sub.2 to CuO is to be between 8:1 and 12:1.In the associated production process, either Bi.sub.2 O.sub.3 powder is purposely admixed to an internally oxidized alloy powder (IOAP) in an additional operation, a grain restructuring with locally different Bi.sub.2 O.sub.3 concentrations occurring in the structure after sintering and compacting.Type: GrantFiled: November 12, 1986Date of Patent: August 16, 1988Assignee: Siemens AktiengesellschaftInventors: Bernhard Rothkegel, Wolfgang Haufe
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Patent number: 4732610Abstract: Loose metal particles, or a consolidated metal particle composition, of an aluminum alloy consisting essentially of about 5 to 13% zinc, 1 to 3.5% magnesium, 0.5 to 3.0% copper, with iron being present up to 0.5%, with silicon being present up to 0.4%, plus nickel or cobalt or both being present in an amount effective essentially to place the iron in the incoherent dispersoid Al.sub.9 (Fe,M).sub.2, M being nickel or cobalt or both, M being present up to 0.75%, plus means being present for forming coherent dispersoids, said means being present up to 1%, balance aluminum.Type: GrantFiled: February 24, 1986Date of Patent: March 22, 1988Assignee: Aluminum Company of AmericaInventors: Gregory J. Hildeman, Linda C. Labarre, David J. Brownhill, Arshad Hafeez
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Patent number: 4731118Abstract: A copper or copper alloy infiltrated ferrous powder metal part, and method for making the same, characterized as having after infiltration an overall density of at least 7.50 g/cm.sup.3 and a diffusion depth of copper into the steel matrix of less than about 4 micrometers as determined by chemical etching or less than about 8 micrometers as determined by electron dispersive X-ray analysis (EDXA), wherein said ferrous metal is plain carbon steel having a combined carbon content in the range of about 0.15% to about 1.25%, or a low alloy steel.Type: GrantFiled: November 28, 1986Date of Patent: March 15, 1988Assignee: SCM Metal Products, Inc.Inventors: Mark Svilar, Erhard Klar
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Patent number: 4687515Abstract: An electrical contact for vacuum interrupters of a pressed and sintered composition of copper (60-80 wt %), ferrovanadium alloy (40-100 wt % of the balance) with at least 80 wt % of any remainder consisting of a refractory metal of the group of chromium, vanadium and their compounds. The ferrovanadium alloy comprises 55-85 wt % of vanadium.Type: GrantFiled: April 10, 1986Date of Patent: August 18, 1987Assignee: General Electric CompanyInventor: Joseph L. Talento
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Patent number: 4662939Abstract: Corrosion resistance of stainless steel powder moldings is improved by combining the powder before molding with about 8 to 16% by weight of an additive consisting essentially of about 2 to 30% by weight of tin and 98 to 70% by weight of copper and/or nickel. Stainless steel moldings are prepared by compacting the powder at high pressure and heating to sintering temperature.Type: GrantFiled: February 21, 1986Date of Patent: May 5, 1987Assignee: Pfizer Inc.Inventor: John H. Reinshagen
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Patent number: 4626282Abstract: Contact material for vacuum circuit breaker according to the present invention contains (1) copper, (2) molybdenum, and (3) niobium or tantalum.Type: GrantFiled: October 30, 1985Date of Patent: December 2, 1986Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Eizo Naya, Mitsuhiro Okumura
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Patent number: 4618473Abstract: A method for forming an iron alloy article having increased toughness comprises compacting and sintering a powder mixture composed of predominantly iron powder and carbon powder and containing a powder of a liquating nickel boride compound. Limited nickel diffusion into the iron structure during sintering produces metastable retained austenite in regions about pores in the product structure that retards crack formation and thereby improves mechanical properties.Type: GrantFiled: June 14, 1985Date of Patent: October 21, 1986Assignee: General Motors CorporationInventor: William F. Jandeska, Jr.
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Patent number: 4613370Abstract: A hollow charge, or plate charge, lining, and a projectile charge coating, made from a composite material of tungsten and copper. Indicated are material proportions, grain sizes, and manufacturing methods.Type: GrantFiled: October 3, 1984Date of Patent: September 23, 1986Assignees: Messerschmitt-Bolkow Blohm GmbH, Bayerische Metallwerke GmbHInventors: Manfred Held, Alfred Leidig, Wilhelm A. Merl, Gunter Stempel
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Patent number: 4608085Abstract: The invention concerns a self-lubricating sintered bearing of antimony bronze, and method for its production, the bearing containing dispersed phases (3, 4, 5) which are harder than the matrix (11), of the following composition (% by weight):Sb 1.5 to 4%Sn 5 to 10% with Sn/Sb=1.3 to 3.5Cu+other elements and impurities: balance,and that its dispersed phases each consist of a diffusion halo (9, 10) in a condition of continuity with the matrix (11), said halo (9, 10) surrounding a microporosity (6, 7, 8) and being of a ternary intermetallic composition (Cu, Sn, Sb).The invention also concerns the process for the production of the self-lubricating sintered bronze bearings.Type: GrantFiled: November 28, 1984Date of Patent: August 26, 1986Assignee: Alliages Frittes MetaframInventors: Michel Eudier, Hassan Youssef
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Patent number: 4604259Abstract: A copper-rich metal shape is produced by forming a coherent forerunner shape consisting essentially of cupreous powder, said powder containing a proportion of copper oxide sufficient for facilitating the obtaining of a high sinter density in sintered porous mass, and in a reducing atmosphere at temperature that will sinter copper present, converting said forerunner shape into a porous sintered mass virtually devoid of copper oxide. Said porous mass can be worked so virtually full density if desired.Type: GrantFiled: September 19, 1985Date of Patent: August 5, 1986Assignee: SCM CorporationInventor: Charles I. Whitman
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Patent number: 4596746Abstract: A metal powder sheet for use for forming a sintered layer on a metal substrate. The sheet includes powders of a metal which provides a required physical property such as wear-resistance and ultra-fine powders of a metal having a powder size finer than 1 micron. These powders are kneaded with an addition of an acryl resin as a binder. The ultra-fine powders make it possible to carry out the sintering process at a lower temperature.Type: GrantFiled: April 17, 1985Date of Patent: June 24, 1986Assignee: Mazda Motor CorporationInventors: Tuyoshi Morishita, Sigemi Osaki
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Patent number: 4581070Abstract: An acoustical transducer is provided with an acoustically absorbant backing material having an acoustical impedance precisely matching the impedance of the piezoelectric element in the transducer. The backing material is a multiphase mixture of selected materials, such as a low melting point alloy (InPb) and one or more powders having high impedance characteristics (tungsten and copper). The slope of the curve impedance versus volume fraction of the backing components is low, thus allowing the impedance of the material to be precisely controlled. The backing material is preferably electrically conductive and is fuzed to one surface of the piezoelectric element to further improve the output characteristics of the transducer.Type: GrantFiled: August 6, 1984Date of Patent: April 8, 1986Assignee: Systems Research Laboratories, Inc.Inventors: Yoseph Bar-Cohen, David A. Stubbs, Wally C. Hoppe
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Patent number: 4534937Abstract: This invention relates to a process for sintering aluminum alloy powders under pressure.It consists in placing the powder in a capsule, in coating the capsule with an easily melted, stable vitreous material with a viscosity between 10.sup.2 and 10.sup.5 poises at the sintering temperature and in pressing it in a unidirectional press.It applies, in powder metallurgy, to the obtaining of castings that exhibit homogeneous mechanical properties, these castings being able to be roughcasts or finished castings.Type: GrantFiled: March 29, 1983Date of Patent: August 13, 1985Assignee: Cegedur Societe de Transformation de L'Aluminium PechineyInventors: Jean Meunier, Marc Salesse
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Patent number: 4505987Abstract: A sliding member highly improved with lubricating performance, wear resistant property and strength has a thin steel sheet or plate and sintered metal layer deposited on the steel sheet, wherein the sintered metal layer, comprises copper as a main component incorporated with a certain amount of tin, nickel, phosphorus, graphite and, optionally, with iron, and a sliding member exhibiting excellent lubricating performance, wear resistant property and strength even under impact and heavy loads includes a thick steel sheet or plate with which thin steel sheet of the above-mentioned sliding member is integrally joined.Type: GrantFiled: November 10, 1981Date of Patent: March 19, 1985Assignees: Oiles Industry Co., Ltd., Mitsuya Seiko Co. Ltd.Inventors: Shinji Yamada, Saburo Hanafusa
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Patent number: 4497669Abstract: An alloy made by water atomizing the charge component into powder, extruding the powder, hot rolling the powder and heat treating the product. The alloy displays superior stress rupture characteristics when compared to a corresponding conventionally wrought alloy.Type: GrantFiled: July 22, 1983Date of Patent: February 5, 1985Assignee: Inco Alloys International, Inc.Inventors: Kathy K. Wang, Mark L. Robinson
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Patent number: 4450135Abstract: A method of preparing electrical contacts and electrical contact materials comprises the steps of blending a conductive metallic component, such as silver, with nickel and zirconium diboride which is substantially completely free of oxides, pressing the powder mixture to form a pre-sintered compact, and thereafter liquid phase sintering the compact to a densified body.The zirconium diboride is mixed with about 2 weight percent of a reducing agent, preferably mixed carbon and boron powders, and heated to remove oxides from the surface of the zirconium diboride powder particles prior to the steps of pressing and sintering.Type: GrantFiled: January 4, 1982Date of Patent: May 22, 1984Assignee: GTE Laboratories IncorporatedInventors: Thomas E. Peters, John C. Gustafson, Boon Wong
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Patent number: 4434211Abstract: A method of forming a clinically unbreakable composite structure between a noble based metal and a ceramic comprising depositing a thin layer of a bonding material including finely divided particles of a noble metal halide alone or in combination with particles of a noble metal; sintering the layer at a predetermined temperature between 1775.degree. F. and 1975.degree. F. and firing a ceramic over the sintered coating.Type: GrantFiled: January 14, 1983Date of Patent: February 28, 1984Inventors: Itzhak Shoher, Aharon Whiteman
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Patent number: 4426356Abstract: A process for making capacitors using electrode compositions of finely divided particles of noble metals and certain inorganic metal oxides dispersed in an inert organic medium. Suitable inorganic metal oxides are MoO.sub.3, GeO.sub.2, Pb.sub.5 Ge.sub.3 O.sub.11, Nb.sub.2 O.sub.5, NiO, ZnO, SnO.sub.2, CdO, metal phosphates, metal fluorides, phosphate glasses, germanate glasses, fluoride glasses and mixtures and precursors thereof.Type: GrantFiled: September 30, 1982Date of Patent: January 17, 1984Assignee: E. I. Du Pont de Nemours and CompanyInventor: Kumaran M. Nair
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Patent number: 4374086Abstract: There is presented an electrical contact material consisting of an alloy of gold and a compound selected from a group consisting of a carbide, a boride, or a silicide of a refractory element. The compound of the refractory element is selected from a group consisting of WC, Hfb.sub.2, TiB.sub.2, ZrB.sub.2, WSi.sub.2, and TiSi.sub.2. The resulting alloys have a hexagonal crystal structure and exhibit high wear resistance, low contact resistance, low electrical noise, and a homogeneous uncontaminated microstructure.Type: GrantFiled: April 27, 1981Date of Patent: February 15, 1983Assignee: The United States of America as represented by the Secretary of the NavyInventor: Jaydev D. Desai
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Patent number: 4372783Abstract: A vacuum type circuit interrupter contact comprises a principal phase material selected from the group consisting of copper and solid solutions of chromium copper, iron copper and cobalt copper, and a second phase material selected from the group consisting of chromium, iron and cobalt. The second phase material is dispersed into the principal phase material and has a particle diameter in the range of 74 .mu.m to 250 .mu.m. The contact can be formed by powder metallurgy, an infiltration process or a fusion process.Type: GrantFiled: July 25, 1980Date of Patent: February 8, 1983Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaru Kato
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Patent number: 4365996Abstract: Cu/Al and Cu/Al/Ni memory alloys having improved mechanical properties are prepared by powder metallurgy from mixtures of pre-alloyed and/or pre-mixed powder ingredients. The mixture of powder ingredients is subjected successively to isostatic pressing, sintering in an inert atmospheric and subsequent multi-step hot working with intermediate annealing which serves to homogenize. Final annealing is carried out in the .beta.-phase solid solution temperature range and the annealed article is quenched in water.Type: GrantFiled: March 2, 1981Date of Patent: December 28, 1982Assignee: BBC Brown, Boveri & Company LimitedInventors: Keith Melton, Olivier Mercier, Helmut Riegger
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Patent number: 4334926Abstract: A bearing material which is excellent in seizure resistance, wear resistance and conformability. The bearing material is prepared by sintering, on a backing steel sheet, a powder mixture consisting of Cu-Pb base alloy powder or its constituent metal powders and 1 to 30 wt. % of one or more members of hard material powders. The hard material powders mean the powders of Mo, Co, Fe.sub.3 P, Fe.sub.2 P, self-fusing alloys, FeB, Fe.sub.2 B, Fe-Cr, Fe-Mn, Fe-Si, Cr, W; SiC and other carbides, TiN and other nitrides, and SiO.sub.2 and other oxides. The bearing material of the present invention is characterized in that it has excellent sliding characteristics especially relative to the materials having rough surfaces.Type: GrantFiled: March 12, 1980Date of Patent: June 15, 1982Assignee: Taiho Kogyo Co., Ltd.Inventors: Kenichiro Futamura, Tatsuhiko Fukuoka
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Patent number: 4304600Abstract: In the interest of mechanical strength and hardness, metallic bodies desirably contain dispersed particles whose diameter preferably is in the range of 50-10,000 Angstrom. A disclosed method for producing such metallic bodies calls for preparing a solution of mixed salts of elements, removing the solvent, transforming to metallic form, and compacting under pressure. Strength of a resulting metallic body may be further developed by aging and, optionally, cold deformation prior to aging.Use of the disclosed method is indicated especially to produce bodies comprising immiscible elements. For example, when Mo is dispersed in Cu, high strength and electrical conductivity are realized.Type: GrantFiled: November 1, 1979Date of Patent: December 8, 1981Assignee: Bell Telephone Laboratories, IncorporatedInventors: John T. Plewes, Murray Robbins, Raymond C. Stoffers
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Patent number: 4285739Abstract: Solid bodies of copper-zinc-aluminium alloys having beta-crystal structure are manufactured by a powder-metallurgic process. Starting with a powder comprising 10-40% by weight of Zn, 1-12% by weight of Al and the balance Cu, the solid bodies are formed by means of a cold compacting step, an optional hot compacting step and a hot extrusion step.Type: GrantFiled: December 21, 1978Date of Patent: August 25, 1981Assignee: Leuven Research and Development VZWInventors: Andre E. A. Deruyttere, Lucas J. A. E. Delaey, Etienne A. D. Aernoudt, Josef R. Roos
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Patent number: 4273580Abstract: The reinforced jacket crown of the present invention comprises an inner structure including a thin metal foil of platinum conforming in shape to the tooth preparation to be restored, at least one fired on coating of a composition of finely divided particles of from about 1 to 100% by weight of a noble metal halide in combination with from zero to 99% by weight of a noble based metal and a relatively thick fired on outer coating of dental porcelain.Type: GrantFiled: April 4, 1979Date of Patent: June 16, 1981Inventors: Itzhak Shoher, Aharon E. Whiteman
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Patent number: 4198234Abstract: A process for the manufacture of sintered metal articles includes the steps of selecting a prealloy powder having a composition consisting essentially of 10-18% chromium, 2-6% iron, 2-6% silicon, 2-6% boron, 0.5-2% carbon, balance nickel, mixing the prealloy powder with copper powder in an amount equal to between 20% and 50% of the weight of the total of prealloy powder and copper, preferably adding a small percentage of a suitable lubricant, pressing the mixture to form a compact, and sintering the compact in the range 1050.degree.-1100.degree. C. for such a time that the copper and the nickel-rich prealloy only partly dissolve in one another.Type: GrantFiled: November 12, 1973Date of Patent: April 15, 1980Assignee: Brico EngineeringInventors: Terence M. Cadle, Martyn S. Lane, Trevor K. Johnson
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Patent number: 4172719Abstract: A local zone only of a powdered metal part is hardened by heating the part, in contact with a powdered metal alloy briquette with a surface of the zone to be locally hardened, to the liquidus range of the briquette and holding the part and the briquette at the liquidus range for a length of time sufficient for the liquid metal and hardening elements of the briquette to infiltrate into the local zone of the part.Type: GrantFiled: December 23, 1976Date of Patent: October 30, 1979Assignee: Amsted Industries IncorporatedInventors: Sherwood W. McGee, Charles T. Shork
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Patent number: 4139378Abstract: The properties of brass powder compacts are improved by including selected amounts of cobalt in the brass powder compositions; specifically brass powder compacts broadly comprising about 5% to about 45% zinc, about 1% to about 7% cobalt, balance essentially copper, are disclosed.Type: GrantFiled: October 28, 1977Date of Patent: February 13, 1979Assignee: The New Jersey Zinc CompanyInventors: Richard S. Bankowski, Kermit E. Geary
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Patent number: 4116688Abstract: Method and material for fabricating composite structures and cutting tools containing super hard filaments using a modified brazing process that employs liquid phase sintering to alloy a mixture of metals about groups of the filaments in side by side parallelized arrangement to produce preforms or bundles of the filaments secured spaced apart in a strong tough metal matrix. A plurality of the completed bundles may then be bonded together by like method and materials into larger structures, tools or cutting portions thereof.Type: GrantFiled: December 24, 1975Date of Patent: September 26, 1978Assignee: General Dynamics CorporationInventor: William Thomas Kaarlela
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Patent number: 4116689Abstract: Material and method for securely attaching boron filaments to other like filaments and to a substrate with preservation of the filament integrity for cutting and abrading by coating them with a mixture of matrix metals essentially containing copper, tin and titanium and joining the filaments by the matrix metals and/or to the substrate into an integral structure by liquid-phase-sintering of the matrix metals which grip and adhere the filaments in a strong, tough alloy with the integrity of the filaments essentially preserved. Boron-filament-containing tools for cutting, grinding, abrading, or the like may be fabricated using the materials of the invention and the methods disclosed.Type: GrantFiled: December 24, 1975Date of Patent: September 26, 1978Assignee: General Dynamics CorporationInventor: William Thomas Kaarlela
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Patent number: 4083650Abstract: Between the rotor and stator components of turbomachines, compressors, pressure wave machines and the like, the clearance space is partially filled out by an abradable element which is capable of "growing" when subjected to an elevated temperature and/or to the influence of the particular atmosphere in which the machine operates. As the element grows, it compensates for corrosion and erosion factors which take place in the machine and which otherwise tend to increase the clearance. Suitable materials which will "grow" under these operating conditions are gray cast iron and a sintered graphite-metal.Type: GrantFiled: June 28, 1976Date of Patent: April 11, 1978Assignee: BBC Brown, Boveri & Company, LimitedInventor: Josef Zboril
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Patent number: 4083719Abstract: Copper powder, carbon fibers arranged in random directions and a metal capable of reacting with carbon fibers are homogeneously mixed together, and the mixture is heated and molded under high pressure to form an integral composite. The so formed carbon fiber-copper matrix composite has no directional characteristic in mechanical properties, and the linear thermal expansion coefficient of the composite is low and the thermal stability of the composite is so high that when it is exposed to high temperature, no damage by thermal deformation is caused.Type: GrantFiled: October 29, 1976Date of Patent: April 11, 1978Assignee: Hitachi, Ltd.Inventors: Hideo Arakawa, Keiichi Kuniya, Takashi Namekawa, Tomio Iizuka
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Patent number: 4029475Abstract: Sintered blanks for rolling and forging, metal powders used in making such blanks, and a method of producing such blanks and powders characterized in that a compound of an alkali metal or an alkaline earth metal is added to the metal powders before sintering.Type: GrantFiled: December 12, 1974Date of Patent: June 14, 1977Assignee: Kabushiki Kaisha Hamai SeisakushoInventors: Yoshihiko Hamai, Tatsuro Hamai, Yuya Tanaka, Akira Nakatani