Sintering Or With Agglomerating Or Compacting Patents (Class 75/765)
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Patent number: 9138806Abstract: An in-situ process for making aluminum titanium carbide composite materials include the steps of mixing powdered aluminum, titanium and calcium carbonate, compacting the mixture and heating by a high frequency induction heater up to a temperature at which titanium carbide is formed at about 800° C.-1,000° C. The compact are then introduced into a tube furnace under an inert atmosphere such as argon, nitrogen, helium etc. at 1200° C. to 1350° C. for 4 to 7 hours to complete the reaction and optimize the TiC particles.Type: GrantFiled: December 19, 2012Date of Patent: September 22, 2015Assignee: King Saud UniversityInventors: Ahmed Mohammed Nabawy Nabawy, Khalil Abdelrazek Khalil, Abdulrahman M. Al-Ahmari
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Publication number: 20140326108Abstract: Iron and molybdenum containing pellets and a process for producing the pellets are disclosed. A green pellet is produced from mixing an iron containing powder, a molybdenum oxide powder, and a carbonaceous powder. The green pellets can be reduced at a temperature in the range of 400-1500° C. The pellets can be briquetted.Type: ApplicationFiled: November 26, 2012Publication date: November 6, 2014Applicant: AB FERROLEGERINGARInventor: Johan Arvidsson
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Publication number: 20140260799Abstract: Iron and molybdenum containing agglomerates and a process for producing the agglomerates is are disclosed. A green agglomerate is produced from mixing an iron containing powder, a molybdenum oxide powder, and a carbonaceous powder. The green agglomerates can be reduced at a temperature in the range of 400-1500° C.Type: ApplicationFiled: May 27, 2014Publication date: September 18, 2014Applicant: AB FERROLEGERINGARInventors: Johan Arvidsson, Dag Sjöberg, Bo Zander
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Patent number: 8696789Abstract: The invention relates to a method for producing a ferroalloy containing nickel. From a fine-grained raw material containing iron and chromium and a fine-grained raw material containing nickel, a mixture is formed with binding agent, the mixture is agglomerated so that first formed objects of desired size are obtained. The objects formed are heat treated in order to strengthen the objects so that the heat treated objects withstand conveyance and loading into a smelter furnace. Further, the objects are smelted under reducing circumstances in order to achieve ferrochromenickel, a ferroalloy of a desired composition containing at least iron, chromium and nickel.Type: GrantFiled: February 11, 2010Date of Patent: April 15, 2014Assignee: Outokumpu OyjInventors: Tuomo Mäkelä, Pekka Niemelä
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Patent number: 8679222Abstract: The process for producing the sponge iron includes the steps of preparing a sandwich of at least two layers wherein the at least two layers includes a first layer (10) of iron oxide source which content is carbon free or comprises of only self-contaminant carbon or carbonaceous and second layer (12) is a mixture of iron oxide source and carbon source and subjecting the sandwich of at least two layers to a pyrolysis process in a non-oxidative environment at temperature between 950° C. to 1900° C. for a period between 10 minutes to 36 hours. The carbon source in the second layer (12) is equal to or more than stoichiometric weight of carbon according to a predominant reaction. The non-oxidative pyrolysis occurs in a reactor. The sandwich of two layers is placed in a moving carrier (16) such as tray to accommodate the sandwich of two layers in the reactor.Type: GrantFiled: March 26, 2010Date of Patent: March 25, 2014Assignee: IOP Specialists SDN. BHD.Inventor: Kin Onn Low
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Publication number: 20130305882Abstract: The subject matter of the invention is a molded body containing titanium, a method for the production thereof, and the use thereof.Type: ApplicationFiled: July 22, 2013Publication date: November 21, 2013Applicant: Sachtleben Chemie GmbHInventors: Djamschid AMIRZADEH-ASL, Dieter FUENDERS
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Publication number: 20130305880Abstract: The present invention concerns a new type of grain refiners for steel, in the form of a particulate composite material, containing a high volume fraction of tailor-made dispersed particles, with the purpose of acting as potent heterogeneous nucleation sites for iron crystals during solidification and subsequent thermo-mechanical treatment of the steel.Type: ApplicationFiled: June 18, 2013Publication date: November 21, 2013Inventors: Oystein GRONG, Casper VAN DER EIJK, Gabriella Maria TRANELL, Leiv Olav KOLBEINSEN
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Patent number: 8246716Abstract: A method of producing a fluxing agent that can be used in production of steel, preferably stainless steel, employs as a raw material a hydroxide sludge that results from neutralization of metal-contaminated pickling liquid from a pickling step for a steel and contains at least one fluoride-containing compound. The hydroxide sludge is calcined. Steel, preferably stainless steel, is produced by decarburizing a steel heat, whereby a slag is formed on top of the steel heat, and adding a fluxing agent to the slag.Type: GrantFiled: June 10, 2010Date of Patent: August 21, 2012Assignee: Outokumpu OyjInventors: Sven-Eric Lunner, Ye Guozhu
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Patent number: 8029923Abstract: The invention relates to a vapour-deposition material for the production of optical layers of high refractive index which comprises titanium oxide and gadolinium oxide and/or dysprosium oxide, to a process for the preparation thereof, and to the use thereof.Type: GrantFiled: January 23, 2004Date of Patent: October 4, 2011Assignee: Merck Patent GmbHInventors: Martin Friz, Reiner Dombrowski, Beate Dombrowski, legal representative, Uwe Anthes
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ORE FINE AGGLOMERATE TO BE USED IN SINTERING PROCESS AND PRODUCTION PROCESS OF ORE FINES AGGLOMERATE
Publication number: 20110232420Abstract: An ore fine agglomerate to be used in a sintering process is disclosed, wherein the ore fine agglomerate is formed by a mixture of ore fine particles and an agglomerating agent, and wherein the particles have diameters between 0.01 mm and 8.0 mm. A production process of ore fines agglomerate is disclosed comprising the steps of using ore fine particles with a granulometry lower than 0.150 mm, mixing the ore fine particles with an agglomerating agent in a ratio of 0.5 to 5.0% by mass of sodium silicate, forming wet particles with diameters between 0.01 mm and 8.0 mm with an addition of water, and drying the wet particles at a temperature varying from 100° C. and 150° C. to form dry particles that are resistant to mechanical efforts and the elements.Type: ApplicationFiled: November 17, 2010Publication date: September 29, 2011Applicant: VALE S.A.Inventors: Hamilton Porto Pimenta, Flavio De Castro Dutra -
Publication number: 20110179910Abstract: A process for producing agglomerates from fine-grained iron carriers and at least one binder as a charge material for a metallurgical process is shown. In at least one further agglomeration step, the agglomerates are coated with a layer, comprising iron carriers and at least one binder, and heated in such a way that the binder is cured in the region of the surface of the agglomerates. In a process for producing liquid pig iron or liquid primary steel products from charge materials and possibly additions and agglomerates, the agglomerates are preheated in a reducing zone, which has a preheating stage, in such a way that the agglomerates completely harden in the preheating stage.Type: ApplicationFiled: August 17, 2009Publication date: July 28, 2011Inventors: Christian Boehm, Hado Heckmann, Hans Herbert Stiasny, Johannes Leopold Schenk
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Publication number: 20100300246Abstract: A method for producing a substantially metallic iron-containing product from iron oxide. The metallic iron produced according to the invention is non-pyrophoric and may be safely shipped and handled without additional process steps. The method of the invention is simple, economical, and produces high quality metallic product which may be used as a feed for Electric Arc Furnace (EAF), Blast Furnaces and Cupolas among other applications.Type: ApplicationFiled: May 24, 2010Publication date: December 2, 2010Inventors: James L. Coburn, John L. Sullivan
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Patent number: 7754280Abstract: The invention relates to a process for producing a material based on silver-carbon, that involves the steps of: (i) providing a suspension of carbon particles; and (ii) supplying a solution of a silver compound and of a reducing agent, such that a silver-containing precipitate is deposited onto the carbon particles, where the carbon particles have a mean diameter of 200 nm or greater. The invention further relates to a material obtainable by this process and to the use of the material in circuit breakers for low-voltage power engineering.Type: GrantFiled: August 10, 2006Date of Patent: July 13, 2010Assignee: Umicore AG & Co. KGInventors: Bernd Kempf, Roger Wolmer, Carsten Boehme, Werner Roth, Andreas Koffler
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Patent number: 7744674Abstract: A method of producing a fluxing agent that can be used in production of steel, preferably stainless steel, employs as a raw material a hydroxide sludge that results from neutralization of metal-contaminated pickling liquid from a pickling step for a steel and contains at least one fluoride-containing compound. The hydroxide sludge is calcined. Steel, preferably stainless steel, is produced by decarburizing a steel heat, whereby a slag is formed on top of the steel heat, and adding a fluxing agent to the slag.Type: GrantFiled: April 6, 2005Date of Patent: June 29, 2010Assignee: Outokumpu OyjInventors: Sven-Eric Lunner, Ye Guozhu
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Patent number: 7682710Abstract: The invention relates to a vapour-deposition material for the production of optical layers of high refractive index which comprises titanium oxide and ytterbium oxide in a molar ratio of from 4:1 to 1:4, to a process for the preparation thereof, and to the use thereof.Type: GrantFiled: January 23, 2004Date of Patent: March 23, 2010Assignee: Merck Patent GmbHInventors: Martin Friz, Reiner Dombrowski, Uwe Anthes
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Patent number: 7655182Abstract: A metallic article made of metallic constituent elements is fabricated from a mixture of nonmetallic precursor compounds of the metallic constituent elements. The mixture of nonmetallic precursor compounds is chemically reduced to produce an initial metallic material, without melting the initial metallic material. The initial metallic material is consolidated to produce a consolidated metallic article, without melting the initial metallic material and without melting the consolidated metallic article.Type: GrantFiled: August 6, 2007Date of Patent: February 2, 2010Assignee: General Electric CompanyInventors: Andrew Philip Woodfield, Eric Allen Ott, Clifford Earl Shamblen
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Patent number: 6946197Abstract: Device nanotechnology based on silicon wafers and other substrates is described. Methods for preparing such devices are discussed. The teachings allow integration of current semiconductor device, sensor device and other device fabrication methods with nanotechnology. Integration of nanotubes and nanowires to wafers is discussed. Sensors, electronics, biomedical and other devices are presented.Type: GrantFiled: February 20, 2004Date of Patent: September 20, 2005Assignee: NanoProducts CorporationInventors: Tapesh Yadav, Dmitri Routkevitch, Peter Mardilovich, Alex Govyadinov, Stephanie Hooker, Stephen S. Williams
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Patent number: 6926755Abstract: An article of aluminum base-metal alloyed with an alloying element is prepared by mixing a chemically reducible nonmetallic base-metal precursor compound of the aluminum base-metal and a chemically reducible nonmetallic alloying-element precursor compound of an alloying element to form a precursor compound mixture. The alloying element may be, but is not necessarily, thermophysically melt incompatible with the aluminum base metal. The method further includes chemically reducing the precursor compound mixture to a metallic alloy, without melting the metallic alloy, and thereafter consolidating the metallic alloy to produce a consolidated metallic article, without melting the metallic alloy and without melting the consolidated metallic article.Type: GrantFiled: June 12, 2003Date of Patent: August 9, 2005Assignee: General Electric CompanyInventors: Clifford Earl Shamblen, Andrew Philip Woodfield, Eric Allen Ott, Michael Francis Xavier Gigliotti
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Patent number: 6926754Abstract: An article of a base metal alloyed with an alloying element is prepared by mixing a chemically reducible nonmetallic base-metal precursor compound of a base metal and a chemically reducible nonmetallic alloying-element precursor compound of an alloying element to form a compound mixture. The base metal is nickel, cobalt, iron, iron-nickel, or iron-nickel-cobalt. One or more of the alloying elements are thermophysically melt incompatible with the base metal. The method further includes chemically reducing the compound mixture to a metallic superalloy, without melting the metallic superalloy, and thereafter consolidating the metallic superalloy to produce a consolidated metallic article, without melting the metallic superalloy and without melting the consolidated metallic article.Type: GrantFiled: June 12, 2003Date of Patent: August 9, 2005Assignee: General Electric CompanyInventors: Clifford Earl Shamblen, Andrew Philip Woodfield, Eric Allen Ott, Michael Francis Xavier Gigliotti
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Patent number: 6713176Abstract: Nanostructured non-stoichiometric materials and methods of reducing manufacturing and raw material costs through the use of nanostructured materials are provided. Specifically, use of non-stoichiometric materials of oxide, nitride, carbide, chalcogenides, borides, alloys and other compositions are taught.Type: GrantFiled: November 27, 2001Date of Patent: March 30, 2004Assignee: NanoProducts CorporationInventors: Tapesh Yadav, Ming Au, Bijan Miremadi, John Freim, Yuval Avniel, Roger Dirstine, John Alexander, Evan Franke
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Publication number: 20030145685Abstract: A process for producing a composite material of titanium carbide, titanium nitride, or tungsten carbide and metal or a metal alloy such as iron or steel or an alloy comprises blending together precursor materials including a titanium or tungsten source, a source of carbon, and a metal or a metal alloy and heating the precursor materials in a vacuum or an inert atmosphere or a nitrogen containing atmosphere to a temperature effective to form TiC, TiN or WC, to thereby form a material comprising particles of TiC, TiN or WC substantially encapsulated in a matrix of metal or metal alloy.Type: ApplicationFiled: November 18, 2002Publication date: August 7, 2003Inventor: William Ronald Owers
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Patent number: 6602543Abstract: Nanostructured non-stoichiometric materials are disclosed. Novel magnetic materials and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel magnetic devices and products.Type: GrantFiled: May 17, 2002Date of Patent: August 5, 2003Assignee: NanoProducts CorporationInventors: Tapesh Yadav, Ming Au, Bijan Miremadi, John Freim, Yuval Avniel, Roger Dirstine, John Alexander, Evan Franke
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Publication number: 20030115985Abstract: A method to agglomerate metal particles such as tantalum and niobium powders is described which includes combining a volatilizable or vaporizable liquid with the particles to form wet particles; compacting the wet particles; drying the compacted wet particles to form a cake; and heat treating the cake to form the agglomerated particles. Also described are agglomerated particles obtained by this method and further, particles, preferably tantalum or niobium powder, having a flow rate of at least about 65 mg/sec and/or an improved pore size distribution, and/or a higher Scott Density. Capacitors made from tantalum powder and niobium powder are also described.Type: ApplicationFiled: November 7, 2002Publication date: June 26, 2003Inventor: Bhamidipaty K. D. P. Rao
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Publication number: 20020166414Abstract: The present invention refers to a method and an equipment for curing and drying self-reducing agglomerates containing cement as a binder in the presence of saturated vapor at a temperature from about 70 to about 110° C. and under atmospheric pressure. The treatment is performed in one single equipment.Type: ApplicationFiled: March 20, 2001Publication date: November 14, 2002Inventors: Marcos de Albuquerque Contrucci, Edmar Saul Marcheze
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Patent number: 6447852Abstract: The present invention relates to a method for manufacturing a diamond composite from diamond particles, comprising the steps of forming a work piece, heating the work piece and controlling the heating temperature and heating time so that a certain desired amount of graphite is created by graphitization of diamond particles, thereby creating an intermediate body, and infiltrating silicon or silicon alloy into the intermediate body. The invention also relates to a diamond composite produced by this method.Type: GrantFiled: March 4, 1999Date of Patent: September 10, 2002Assignee: Ambler Technologies, Inc.Inventors: Sergey Konstantinovitch Gordeev, Sergey Germanovitch Zhukov, Lija Vladimirovna Danchukova, Thommy Ekström
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Patent number: 6352572Abstract: The wet granulated iron ore is initially conducted through a drying zone. The ore leaves the drying zone at a temperature of 120-400° C. The ore is then heated in direct contact with hot gas to temperatures of 700-1,100° C. before being delivered to a reduction zone. The ore coming out of the drying zone is fully or partially guided through a separating device so as to separate the ore into fine and coarse grain fractions. The fine-grained ore fraction is conveyed to a granulating device so as to produce an iron ore granulate which is conducted to the drying zone. The coarse-grained ore fraction is heated to temperatures of 700-1,100° C. before it is guide into the reduction zone.Type: GrantFiled: February 18, 2000Date of Patent: March 5, 2002Assignee: Metallgesellschaft AGInventors: Ali Beyzavi, Martin Hirsch
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Patent number: 6342089Abstract: A method for producing the direct reduced iron pellets. The method includes pelletizing, iron oxide-containing material, internal reductant and binder to form green pellets. The binder includes a non-combustible fibrous material. The method also includes firing the green pellets to convert the green pellets into direct reduced iron pellets.Type: GrantFiled: December 6, 1999Date of Patent: January 29, 2002Inventor: John R. McGaa
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Patent number: 6332912Abstract: The invention relates to a method for reducing the formation of clods and the clustering tendency of reducible iron-containing agglomerated material, particularly so-called pellets, whereby the reducible iron-containing agglomerated material, following a desulfurization process that takes place after a sintering process during the manufacture of the pellets, is given an outer layer of clustering-reducing material in the form of a liquid suspension of particulate material. According to the invention, a more even distribution of the coating on the surface of the agglomerate is achieved in that the application of the liquid suspension takes place during tumbling in a drum that is designed so that the agglomerate together with the liquid suspension can essentially pass freely through it.Type: GrantFiled: November 16, 1999Date of Patent: December 25, 2001Assignee: Luossavaara-Kiirunavaara AB (LKAB)Inventor: Roger Klemo
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Publication number: 20010047699Abstract: The invention is a method of making metallized iron agglomerates by combining iron/steel particles and a reductant material with a cellulose fiber binder material, compacting the combination to form a solid agglomerate, and reducing the iron portions of the agglomerate in a direct reduction furnace. The cellulose fiber binder material provides an agglomerate having improved strength and lower overall cost than comparable agglomerates using binders known in the art.Type: ApplicationFiled: May 10, 2001Publication date: December 6, 2001Inventors: Glenn E. Hoffman, James M. McClelland
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Patent number: 6015447Abstract: The present invention relates to cobalt metal agglomerates consisting of peanut-shaped primary particles, to a process for the production thereof and to the use thereof.Type: GrantFiled: November 21, 1997Date of Patent: January 18, 2000Assignee: H.C. Starck GmbH & Co. KGInventors: Astrid Gorge, Juliane Meese-Marktscheffel, Dirk Naumann, Armin Olbrich, Frank Schrumpf
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Patent number: 5930579Abstract: A method for manufacturing reduced iron briquettes, wherein reduced iron obtained by a direct reduction method is made into briquettes using a briquette machine, and whereafter the hot briquettes are subject to gradual cooling at a cooling rate in the range of 150.degree. C. to 250.degree. C. per minute using water spray. The reduced iron briquettes thus obtained are (a) less prone to breakage break during storage and transport; (b) less prone to degeneration into powder accompanying such breakages etc.; and (c) also display an excellent degree of metallization. Hence, the loss in weight during storage and transport can be reduced, and the harmful effects caused by dust to the transport vehicles, ships, loading/unloading equipment, and operators of the same can be reduced. Also, since the number of breakages is reduced, there is also a reduction in the amount of any re-oxidation of the reduced iron which tends to occur at newly exposed faces, whereby a product of more consistent quality can be obtained.Type: GrantFiled: October 27, 1995Date of Patent: July 27, 1999Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Hiroshi Nagumo, Yutaka Inada, Yoshinori Kanno, Osamu Tsuge
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Patent number: 5435835Abstract: A system and process for treating dust and sludge from iron and steel making operations and includes separating iron and carbon from zinc and lead. Separation is performed in a series of hydrocyclones associated in a series-parallel fashion, The iron and carbon is recycled within the iron making operation without detriment to furnace liners, Lime and flocculent are added to the lead and zinc to create a stable material suitable for landfill disposal, Sludges are consumed by injection onto a sinter strand.Type: GrantFiled: January 6, 1994Date of Patent: July 25, 1995Assignee: Bethlehem Steel CorporationInventors: John D. Lynn, Thomas H. Weidner, Elmer D. Anderson, II
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Patent number: 5382279Abstract: A process for consuming oily sludge waste product in steel making operations includes spraying a waste slurry onto the moving porous bed of a sinter strand. A burner hood is spaced above a portion of the moving bed. The bed carries a sinter mix which is ignited in the ignition zone of the burner hood and the slurry is sprayed onto the ignited sinter mix immediately downstream of the ignition zone. A vacuum system draws the slurry through the ignited sinter mix ensuring substantially complete combustion of the slurry.Type: GrantFiled: January 7, 1994Date of Patent: January 17, 1995Assignee: Bethlehem Steel CorporationInventor: Elmer D. Anderson, II
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Patent number: 5336291Abstract: In order to produce easily and at low cost a metallic composite material incorporating metal carbide particles dispersed therein such that fine TiC particles and/or ZrC particles are uniformly dispersed in a matrix of Al or Al alloy, first, a pellet (16) is formed from Ti powder and/or Zr powder (10), graphite powder (12) and Al or Al alloy powder (14), then the pellet is infiltrated with molten Al or Al alloy, and thereafter the pellet is heated up to 1000.degree.-1800.degree. C. in an inactive atmosphere, so that TiC particles and/or ZrC particles are generated in the pellet. Then the pellet is dissolved in a molten bath of Al or Al alloy.Type: GrantFiled: July 1, 1993Date of Patent: August 9, 1994Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tetsuya Nukami, Tetsuya Suganuma
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Patent number: 5102454Abstract: Composite powders containing a first group of metals of iron, cobalt, nickel and molybdenum in specific ratios and one or more oxidizable metals can be formed by forming an aqueous solution containing first group of metals, forming solid material of the metals from the solution, reducing the solid material to a metallic powder, combining that powder with one or more easily oxidizable metals in an non-oxidizing atmosphere.Type: GrantFiled: January 30, 1989Date of Patent: April 7, 1992Assignee: GTE Products CorporationInventors: Walter A. Johnson, Nelson E. Kopatz, Joseph E. Ritsko