Chromium Containing Patents (Class 420/588)
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Patent number: 6696176Abstract: A fusion weldable superalloy containing 0.005-0.5 wt. % scandium. In one embodiment, the superalloy may have a composition similar to IN-939 alloy, but having added scandium and having only 0.005-0.040 wt. % zirconium. A gas turbine component may be formed by an investment casting of such a scandium-containing superalloy, and may include a fusion weld repaired area. A scandium-containing nickel-based superalloy coated with an MCrAlY bond coat will have improved cyclic oxidation resistance due to the sulfur-gettering effect of the scandium.Type: GrantFiled: March 6, 2002Date of Patent: February 24, 2004Assignee: Siemens Westinghouse Power CorporationInventors: David B. Allen, Gregg P. Wagner, Brij B. Seth
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Patent number: 6690759Abstract: Disclosed herein are zirconium-base alloys excellent in both corrosion resistance and hydrogen absorption property, useful as materials for nuclear reactors. Such a zirconium-base alloy for nuclear reactors comprises 0.5-2 wt. % Sn, 0.07-0.6 wt. % Fe, 0.03-0.2 wt. % Ni, 0.05-0.2 wt. % Cr, and the balance being zirconium and unavoidable impurities, wherein the Fe content (X wt. %) of the zirconium-base alloy and the mean size (Y nm) of precipitates in the zirconium-base alloy are present in a region on the x (Fe content X) and y (mean precipitate size) rectangular coordinates, surrounded by the following five lines: i) Y=−444×X+154, ii) Y=910×X−46, iii) Y=0, iv) Y=300, and v) X=0.6.Type: GrantFiled: October 4, 2002Date of Patent: February 10, 2004Assignee: Global Nuclear Fuel - Japan Co., Ltd.Inventors: Shuichi Nanikawa, Shinji Ishimoto, Toshio Kubo
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Patent number: 6652991Abstract: The addition of small amounts of CeO2 and Cr to intermetallic compositions of NiAl and FeAl improves ductility, thermal stability, thermal shock resistance, and resistance to oxidation, sulphidization and carburization.Type: GrantFiled: October 9, 2002Date of Patent: November 25, 2003Assignee: The Governors of the University of AlbertaInventors: You Wang, Weixing Chen
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Publication number: 20030211004Abstract: An anti-abrasive and anti-corrosive alloy capable of being finished by cutting process in a condition where it has been built on the surface of a base metal.Type: ApplicationFiled: May 13, 2002Publication date: November 13, 2003Inventor: Akihiro Satou
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Publication number: 20030170489Abstract: A fusion weldable superalloy containing 0.005-0.5 wt. % scandium. In one embodiment, the superalloy may have a composition similar to IN-939 alloy, but having added scandium and having only 0.005-0.040 wt. % zirconium. A gas turbine component may be formed by an investment casting of such a scandium-containing superalloy, and may include a fusion weld repaired area. A scandium-containing nickel-based superalloy coated with an MCrAlY bond coat will have improved cyclic oxidation resistance due to the sulfur-gettering effect of the scandium.Type: ApplicationFiled: March 6, 2002Publication date: September 11, 2003Applicant: Siemens Westinghouse Power CorporationInventors: David B. Allen, Gregg P. Wagner, Brij B. Seth
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Patent number: 6613275Abstract: The present invention concerns a non-precious dental alloy, including the following components, with the approximate proportions, in weight, given in %: gold, between 0.5 and 4, molybdenum, between 4 and 6, tungsten, between 2 and 7, indium, between 0.5 and 4, gallium, between 0.5 and 4, tin, between 0 and 4, titanium, between 0 and 2, copper, between 0 and 2, the remainder being obtained with a mixture containing approximately 70% cobalt and 30% chromium.Type: GrantFiled: July 19, 2002Date of Patent: September 2, 2003Assignee: Metalor Technologies SAInventor: Nicolas Vuilleme
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Publication number: 20030148180Abstract: A modified Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy which has at least one of the following characteristics: 1) an increased charge/discharge rate capability over that the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; 2) a formation cycling requirement which is reduced to one tenth that of the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; or 3) an oxide surface layer having a higher electrochemical hydrogen storage catalytic activity than the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy.Type: ApplicationFiled: May 16, 2001Publication date: August 7, 2003Inventors: Michael A. Fetcenko, Kwo Young, Stanford R. Ovshinsky, Benjamin Reichman, John Koch, William Mays
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Patent number: 6554920Abstract: An alloy and repair material comprising the alloy, articles comprising the alloy and repair material, and methods for repairing articles including provision of the alloy as repair material are described, with the alloy comprising ruthenium, nickel, aluminum, and chromium, wherein a microstructure of the alloy is essentially free of an L12-structured phase at temperatures greater than about 1000° C. and comprises an A3-structured phase and up to about 40 volume percent of a B2-structured phase.Type: GrantFiled: November 20, 2001Date of Patent: April 29, 2003Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Canan Uslu Hardwicke, Ji-Cheng Zhao, Charles Gitahi Mukira
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Publication number: 20030051778Abstract: A low temperature hydrogen storage alloy which is not pyrophoric upon exposure to ambient atmosphere, particularly even after hydrogen charge/discharge cycling.Type: ApplicationFiled: October 10, 2002Publication date: March 20, 2003Inventors: Stanford R. Ovshinsky, Rosa T. Young, Baoquan Huang
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Patent number: 6521356Abstract: An environmentally resistant coating for improving the oxidation resistance of a niobium-based refractory metal intermetallic composite (Nb-based RMIC) at high temperatures, the environmentally resistant coating comprising silicon, titanium, chromium, and niobium. The invention includes a turbine system having turbine components comprising at least one Nb-based RMIC, the environmentally resistant coating disposed on a surface of the Nb-based RMIC, and a thermal barrier coating disposed on an outer surface of the environmentally resistant coating. Methods of making a turbine component having the environmentally resistant coating and coating a Nb-based RMIC substrate with the environmentally resistant coating are also disclosed.Type: GrantFiled: February 2, 2001Date of Patent: February 18, 2003Assignee: General Electric CompanyInventors: Ji-Cheng Zhao, Melvin Robert Jackson, Bernard Patrick Bewlay
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Patent number: 6497968Abstract: An environmentally resistant coating comprising silicon, titanium, chromium, and a balance of niobium and molybdenum for turbine components formed from molybdenum silicide-based composites. The turbine component may further include a thermal barrier coating disposed upon an outer surface of the environmentally resistant coating comprising zirconia, stabilized zirconia, zircon, mullite, and combinations thereof. The molybdenum silicide-based composite turbine component coated with the environmentally resistant coating and thermal barrier coating is resistant to oxidation at temperatures in the range from about 2000° F. to about 2600° F. and to pesting at temperatures in the range from about 1000° F. to about 1800° F.Type: GrantFiled: February 26, 2001Date of Patent: December 24, 2002Assignee: General Electric CompanyInventors: Ji-Cheng Zhao, Bernard Patrick Bewlay, Melvin Robert Jackson
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Publication number: 20020179200Abstract: A low temperature hydrogen storage alloy which is not pyrophoric upon exposure to ambient atmosphere, particularly even after hydrogen charge/discharge cycling.Type: ApplicationFiled: June 4, 2001Publication date: December 5, 2002Inventors: Stanford R. Ovshinsky, Rosa T. Young, Baoquan Huang
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Patent number: 6461744Abstract: A description follows of an article based on a nickel-chromium-silicon metal alloy, including microcrystalline borides, obtained by the rapid solidification and subsequent thermal treatment of a nickel-chromium-boron-silicon metal alloy comprising from 39.0 to 69.4 atom % of nickel, from 11.8 to 33.9 atom % of chromium, from 7.6 to 27.4 atom % of boron and from 7.6 to 17.5 atom % of silicon. The above article is preferably a tape or a sheet or a fiber having high mechanical properties and is particularly resistant to oxidation.Type: GrantFiled: December 15, 2000Date of Patent: October 8, 2002Assignee: Edison Termoelettrica S.p.A.Inventors: Giovanni Giunchi, Sergio Ceresara
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Patent number: 6355212Abstract: The invention is directed to anti-corrosive alloys and relates in particular to an alloy containing cobalt, chromium, aluminum, yttrium, silicon, a metal from the second main group, together with the corresponding oxide, in the following proportions: chromium (Cr) 26.0-30%; aluminum (Al) 5.5-13.0%; yttrium (Y) 0.3-1.5%; silicon (Si) 1.5-4.5%; metal from the second main group (magnesium, calcium, barium, strontium) 0.1-2.0%; oxide of the corresponding metal from the second main group 0.1-2.0%; cobalt (Co) remaining percentage. Preferably, tantalum (Ta) is also added in a proportion of 0.5-4.0%, and the remaining percentage of cobalt is replaced by a remaining percentage of Me, Me being understood to mean a metal which may be nickel (Ni) or iron (Fe) or cobalt (Co) or a composition comprising Ni—Fe—Co, Ni—Fe, Ni—Co, Co—Fe.Type: GrantFiled: January 5, 2000Date of Patent: March 12, 2002Assignee: Turbocoating SpAInventor: Nelso Antolotti
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Patent number: 6294132Abstract: This invention relates to a TiAl intermetallic compound-based alloy exhibiting excellent heat resistance, oxidation resistance and resonance resistance and having a cast structure composed of fine equiaxed grains. Specifically, it relates to a TiAl intermetallic compound-based alloy comprising of 45 to 48 atomic percent of Al, 5 to 9 atomic percent of Nb, 1 to 2 atomic percent of Cr, 0.2 to 0.5 atomic percent of Si, 0.3 to 2 atomic percent of Ni, 0.01 to 0.05 atomic percent of Y, and the balance being Ti and incidental impurities, the alloy exhibiting excellent heat resistance, oxidation resistance and resonance resistance and having a cast structure formed of fine equiaxed grains.Type: GrantFiled: April 28, 1999Date of Patent: September 25, 2001Assignee: Mitsubishi Heavy Industries Ltd.Inventor: Toshimitsu Tetsui
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Patent number: 6284392Abstract: A cast nickel-base superalloy component (10) is made having a composition containing small amounts of both boron and zirconium which are effective in combination to provide increased weldability, where such alloy is adapted for welding by weld (18) to a second superalloy piece, where the two pieces are firmly bonded together and have a Sigmajig transverse stress value (16) greater than 137.9 million Newtons per square meter.Type: GrantFiled: August 11, 1999Date of Patent: September 4, 2001Assignee: Siemens Westinghouse Power CorporationInventors: Brij B. Seth, Easo P. George, Sudarsanum S. Babu, Gene M. Goodwin, Stanislaus A. David, Carol E. Moyer
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Patent number: 6270719Abstract: A modified Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy which has at least one of the following characteristics: 1) an increased charge/discharge rate capability over that the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; 2) a formation cycling requirement which is reduced to one tenth that of the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; or 3) an oxide surface layer having a higher electrochemical hydrogen storage catalytic activity than the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy.Type: GrantFiled: April 12, 1999Date of Patent: August 7, 2001Assignee: Ovonic Battery Company, Inc.Inventors: Michael A. Fetcenko, Kwo Young, Stanford R. Ovshinsky, Benjamin Reichman, John Koch, William Mays
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Patent number: 6266979Abstract: Cobalt alloys are disclosed for use in the fabrication of spinner discs for fiberizing molten glass into fibers in rotary fiberizing processes. The cobalt alloys fall within the following ranges, in percentage by weight, Co 22.0-54.0; Cr 30.0-34.0; Ni 9.0-31.0; Mo 0.0-7.0; C 0.45-0.65; Si 0.25-1.0; Mn 0.30-0.80; precious metals (PM) 0.0-2.0; and carbide forming metals (CFM) 0.0-1.3.Type: GrantFiled: September 2, 1999Date of Patent: July 31, 2001Assignee: Johns Manville International, Inc.Inventors: Walter A. Johnson, Gary W. Smiley, Robert Rushforth, John Strothers
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Patent number: 6258317Abstract: An ultra supercritical boiler tubing alloy characterized by a microstructure stabilized and strengthened for 375 bar/700° C. steam, in weight percent, service and alloyed to resist coal ash/flue gas corrosion for 200,000 hours consisting of 10 to 24 cobalt, 22.6 to 30 chromium, 2.4 to 6 molybdenum, 0 to 9 iron, 0.2 to 3.2 aluminum, 0.2 to 2.8 titanium, 0.1 to 2.5 niobium, 0 to 2 manganese, 0 to 1 silicon, 0.01 to 0.3 zirconium, 0.001 to 0.01 boron, 0.005 to 0.3 carbon, 0 to 4 tungsten, 0 to 1 tantalum and balance nickel and incidental impurities.Type: GrantFiled: June 19, 1998Date of Patent: July 10, 2001Assignee: Inco Alloys International, Inc.Inventors: Gaylord Darrell Smith, Shailesh Jayantilal Patel, Norman Charles Farr
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Publication number: 20010003997Abstract: A modified Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy which has at least one of the following characteristics: 1) an increased charge/discharge rate capability over that the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; 2) a formation cycling requirement which is reduced to one tenth that of the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy; or 3) an oxide surface layer having a higher electrochemical hydrogen storage catalytic activity than the base Ti—V—Zr—Ni—Mn—Cr electrochemical hydrogen storage alloy.Type: ApplicationFiled: December 18, 2000Publication date: June 21, 2001Inventors: Michael A. Fetcenko, Kwo Young, Stanford R. Ovshinsky, Benjamin Reichman, John Koch, William Mays
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Patent number: 6200688Abstract: A wear resistant alloy is provided having a composition by weight of 1.0-2.5 C, 1.5-4.5 Si, 8.0-20.0 Cr, 9.0-20.0 W and/or Mo, 0.5-2.0 Nb, 20.0-40.0 Fe, and the balance being Ni (>25.0). This alloy provides excellent wear resistance and good hot hardness with relatively low cost compared to prior art nickel base alloys. The alloy has particular use as a valve seat insert materials in diesel fuel internal combustion engines.Type: GrantFiled: April 20, 1998Date of Patent: March 13, 2001Assignee: Winsert, Inc.Inventors: Xuecheng Liang, Gary R. Strong
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Patent number: 6106767Abstract: Nickel-base alloys with improved elevated temperature creep and stress rupture lives are disclosed which are particularly useful for components in gas turbine engines exposed to high temperatures and stresses for long periods of time. The alloys are nickel-based consisting essentially of 0.005 to 0.15% C, 0.10 to 11% Mo, 0.10 to 4.25% W, from 12 to 31% Cr, 0.25 to 21% Co, up to 5% Fe, 0.10 to 3.75% Nb, 0.10 to 1.25% Ta, 0.01 to 0.10% Zr, 0.10 to 0.50% Mn, 0.10 to 1% V, l.8-4.75% Ti, 0.5 to 5.25% Al, less than 0.003% P, and 0.004 to 0.025% B. Key to the improvement of creep and stress rupture lives is the extremely low P content in conjunction with high B contents.Type: GrantFiled: June 18, 1998Date of Patent: August 22, 2000Assignee: Teledyne Industries, Inc.Inventors: Richard L. Kennedy, Wei-Di Cao
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Patent number: 6077615Abstract: A Co-base alloy including, by weight, 0.03-0.10% C, not more than 1.0% Si, not more than 1.0% Mn, 20-30% Cr, 15-23% Ni, 3-10% W, 5-10% Ta and 0.05-0.7% Zr, is used as a welding material. A gas turbine nozzle has a crack repaired with a multi-layer weld using the Co-base alloy and a gas turbine for power generation employs the nozzle.Type: GrantFiled: December 16, 1997Date of Patent: June 20, 2000Assignee: Hitachi, Ltd.Inventors: Masami Yada, Takao Funamoto, Takamitsu Nakazaki, Kei Kobayashi, Norio Yokoba, Nobuyuki Iizuka, Kazuhiko Kumata
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Patent number: 6057045Abstract: A powder-metallurgy produced high-speed steel article having a combination of high hardness and wear resistance, particularly at elevated temperatures. This combination of properties is achieved by the combination of W, Mo, V, and Co. The article is particularly suitable for use in the manufacture of gear cutting tools, such as hobs, and surface coatings.Type: GrantFiled: October 14, 1997Date of Patent: May 2, 2000Assignee: Crucible Materials CorporationInventors: Andrzej L. Wojcieszynski, William Stasko
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Patent number: 5968450Abstract: The present invention provides a scandium containing hydrogen absorption alloy having an alloy phase which is represented by the following formula;(Sc.sub.x A.sub.1-x)(B'.sub.y B".sub.2-y).sub.zwherein A is at least one of Ti, Zr, rare-earth elements, a mixture of Ti and at least one of Zr, Ta, Nb, Hf, Ca and rare-earth elements, and a mixture of Zr and at least one of Ti, Ta, Nb, Hf, Ca and rare-earth elements; B'is at least one of Ni, Fe, Co and a mixture of at least one of Ni, Fe and Co and at least one of Al, Ga, Si and In; B" is at least one of Mn, V, Cr, Nb, Ti and a mixture of at least one of Mn, V, Cr, Nb and Ti and at least one of Al, Ga, Si and In; x represents 0<x.ltoreq.1; y represents 0<y<2; and z represents 0.75.ltoreq.z.ltoreq.1.2, and the alloy phase includes at least one of a part which belongs to a C15 type Laves phase and a part which belongs to a C14 type Laves phase, and a hydrogen absorption electrode which includes the alloy.Type: GrantFiled: September 14, 1994Date of Patent: October 19, 1999Assignee: Hitachi Chemical Company, Ltd.Inventors: Masato Yoshida, Takitaro Yamaguchi, Takao Ogura
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Patent number: 5962156Abstract: A nickel-metal hydride storage battery having a high capacity and excellent cycle life is disclosed. The battery employs, as its material for the negative electrode, a hydrogen storage alloy powder having a composition represented by the general formula Zr.sub.1-x M3.sub.x Mn.sub.a Mo.sub.b Cr.sub.c M1.sub.d M2.sub.e Ni.sub.f, where M1 represents at least one element selected from the group consisting of V, Nb and rare earth elements, M2 represents at least one element selected from the group consisting of Fe, Co and Cu, and M3 represents at least one element selected from the group consisting of Ti and Hf, and where 0.ltoreq.x.ltoreq.0.3, 0.3.ltoreq.a.ltoreq.0.7, 0.01.ltoreq.b.ltoreq.0.2, 0.05.ltoreq.c.ltoreq.0.3, 0.ltoreq.d.ltoreq.0.1, 0.ltoreq.e.ltoreq.0.2, 0.8.ltoreq.f.ltoreq.1.3, and 1.6.ltoreq.a+b+c+d+e+f.ltoreq.2.2, and wherein said hydrogen storage alloy has at least one of a Laves phase having a crystal structure of the MgCu.sub.2 -type (C15) and a Laves phase having a crystal structure of the MgZn.Type: GrantFiled: February 19, 1997Date of Patent: October 5, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoichi Izumi, Yoshio Moriwaki, Katsumi Yamashita, Takashi Tokuhiro
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Patent number: 5951945Abstract: There is provided a hydrogen occluding alloy exhibiting high absorption and desorption speeds. A hydrogen occluding alloy comprising as an overall composition: 25 to 45 weight % Zr+Hf, wherein the Hf comprises not more than 4%, 1 to 12 weight % Ti, 10 to 20 weight % Mn, 2 to 12 weight % V, 0.6 to 5 weight % rare earth elements, and a balance Ni (of which content is not less than 25 weight %) and unavoidable impurities, and basically having a three-phase structure consisting of: a main phase which constitutes the matrix of the alloy and which is made of a Zr--Ni--Mn based alloy, a dispersed granular phase made of a rare earth elements--Ni type alloy distributed along the grain boundary of the main phase, and a flaky phase which is made of a Ni--Zr type alloy attached to the dispersed granular phase and intermittently distributed along the grain boundary mentioned above.Type: GrantFiled: May 16, 1996Date of Patent: September 14, 1999Assignee: Mitsubishi Materials CorporationInventors: Norikazu Komada, Mitsugu Matsumoto, Shinichiro Kakehashi, Yoshitaka Tamo
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Patent number: 5942055Abstract: A silicide-based composite toughened with a niobium-based metallic phase and further containing a silicon-modified chromium-based Laves-type phase to promote oxidation resistance. The silicide-based composite generally contains one or more silicide intermetallic phases, each of which is an M.sub.5 Si.sub.3 -type or an M.sub.3 Si-type phase where M is at least Nb+Ti+Hf. The niobium-based metallic phase contains at least niobium, titanium, hafnium, chromium, aluminum and silicon. The silicon-modified Laves-type phase is of the Cr.sub.2 M type where M is Nb+Ti+Hf. The silicide-based composite is formulated to contain greater than 25 volume percent of the niobium-based metallic phase, the balance being the silicide intermetallic phases and the silicon-modified Laves-type phase.Type: GrantFiled: August 10, 1998Date of Patent: August 24, 1999Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Bernard Patrick Bewlay
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Patent number: 5932033Abstract: A silicide-based composite toughened with a niobium-based metallic phase, and further containing a phase that significantly improves the oxidation resistance of the composite. The oxidation-resistant phase is a chromium-based Laves-type phase modified with silicon, which has been shown to greatly increase the oxidation resistance of silicide-based composites at temperatures of up to 1200 C. The oxidation-resistant silicide-based composite generally contains one or more silicide intermetallic phases, each of which is an M.sub.5 Si.sub.3 -type phase where M is Nb+Ti+Hf. The niobium-based metallic phase contains niobium, titanium, hafnium, chromium, aluminum and silicon. The silicon-modified Laves-type phase is of the Cr.sub.2 M type where M is Nb+Ti+Hf. A silicide-based composite contains, in atomic percent, about 12-25% titanium, about 6-12% hafnium, about 15-25% chromium, about 1-8% aluminum and about 12-20% silicon, with the balance essentially niobium.Type: GrantFiled: August 12, 1998Date of Patent: August 3, 1999Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Bernard Patrick Bewlay
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Patent number: 5888316Abstract: This invention relates to nickel-cobalt based alloys comprising the following elements in percent by weight: from about 0.002 to about 0.07 percent carbon, from about 0 to about 0.04 percent boron, from about 0 to about 2.5 percent columbium, from about 12 to about 19 percent chromium, from about 0 to about 6 percent molybdenum, from about 20 to about 35 percent cobalt, from about 0 to about 5 percent aluminum, from about 0 to about 5 percent titanium, from about 0 to about 6 percent tantalum, from about 0 to about 6 percent tungsten, from about 0 to about 2.5 percent vanadium, from about 0 to about 0.06 percent zirconium, and the balance nickel plus incidental impurities, the alloys having a phasial stability number N.sub.v3B less than about 2.60. Furthermore, the alloys have at least one element selected from the group consisting of aluminum, titanium, columbium, tantalum and vanadium. Also, the alloys have at least one element selected from the group consisting of tantalum and tungsten.Type: GrantFiled: June 3, 1997Date of Patent: March 30, 1999Assignee: SPS Technologies, Inc.Inventor: Gary L. Erickson
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Patent number: 5888317Abstract: The present invention relates to a material for hydrogen-storage constituted by Ti-Mn alloy system which has a high hydrogen-storage capacity, plateau hydrogen dissociation equilibrium pressure, hypostoichiometric composition and crystal structure of C14. Ti-Mn alloy system for hydrogen-storage of the invention which has a C14 crystal structure, is represented as: Ti.sub.u Zr.sub.v Mn.sub.w Cr.sub.x V.sub.y X.sub.z, wherein, X is at least one of element selected from the group consisting of Fe, Al and Ni; u, v, w, x, y and z are mole numbers of each components; 0.7<u<1.0; 0<v<0.3; 1.0.ltoreq.w.ltoreq.1.3; 0.1.ltoreq.x.ltoreq.0.4; 0<y<0.3; 0.ltoreq.z.ltoreq.0.2; 0.7<u+v<1.0; 1.4.ltoreq.w+x.ltoreq.1.7; and, 1.3.ltoreq.w+x+y+z<2.0.Type: GrantFiled: April 30, 1996Date of Patent: March 30, 1999Assignee: Korea Advanced Institute of Science and TechnologyInventors: Jai-Young Lee, Ki-Young Lee, Han-Ho Lee, Dong-Myung Kim, Ji-Sang Yu, Jae-Han Jung, Soo-Geun Lee
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Patent number: 5866068Abstract: A heat-resistant alloy suitable as a material for reactor tubes such as cracking tubes for producing ethylene in the petrochemical industry consisting essentially of, in % by weight, 0.1 to 0.5% of C, over 0% to not more than 4% of Si, over 0% to not more than 3% of Mn, over 40% to not more than 50% of Cr, over 0% to not more than 10% of Fe, 0.01 to 0.6% of Ti, 0.01 to 0.2% of Zr, at least one element selected from the group consisting of 0.5 to 5% of W, 0.3 to 2% of Nb and 0.5 to 3% of Mo, and the balance substantially Ni. The alloy is excellent in oxidation resistance, high-temperature creep rupture strength, carburization resistance and ductility after aging.Type: GrantFiled: April 7, 1997Date of Patent: February 2, 1999Assignee: Kubota CorporationInventor: Makoto Takahashi
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Patent number: 5851690Abstract: A hydrogen absorbing alloy for use in an environment where the alloy has the possibility of contacting oxygen is capable of inhibiting impairment of the hydrogen absorbing ability thereof when coming into contact with oxygen. The alloy has a composition represented in atomic ratio by Ti.sub.1-x Y.sub.x Mn.sub.y wherein x and y are in the range of 0<x.ltoreq.0.2 and 1.5.ltoreq.y.ltoreq.2.0, respectively, and comprises a C14-type crystal structure of Laves phase, the Laves phase having a segregaton phase of high Y concentration. Ti can be replaced by Hf and/or Zr within the range of over 0 to not greater than (1-x)/2 included in 1-x for the Ti atom. Mn can be replaced by V or Fe within the range of over 0 to not greater than y/2 included in y for the Mn atom.Type: GrantFiled: August 22, 1997Date of Patent: December 22, 1998Assignee: Sanyo Electric Co., Ltd.Inventors: Yumiko Nakamura, Hiroshi Nakamura, Maki Kamikawa, Hiroshi Watanabe, Shin Fujitani, Ikuo Yonezu
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Patent number: 5833773Abstract: Nb-base alloys that include Ti, Hf, Cr, Al and Si as alloy constituents have a microstructure that includes a metallic solid solution phase and a mixture of intermetallic silicide phases. The metal silicide phases include an M.sub.3 Si silicide, where M comprises Nb, Ti or Hf, and an M.sub.5 (Si, Al).sub.3 silicide, where M comprises Nb, Ti or Hf. These alloys have mechanical properties such as low temperature fracture toughness, high temperature fracture strength, high temperature stress rupture strength and high temperature creep resistance, that meet or exceed those of certain Ni-base superalloys.Type: GrantFiled: July 6, 1995Date of Patent: November 10, 1998Assignee: General Electric CompanyInventors: Bernard Patrick Bewlay, Melvin Robert Jackson
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Patent number: 5815792Abstract: A nickel-based superalloy possessing good mechanical properties when hot regarding traction, creep and cracking resistance has a chemical composition which comprises, in percentages by weight: Co 14.5 to 15.5 ; Cr 12 to 15 ; Mo 2 to 4.5 : Al 2.5 to 4; Ti 4 to 6; Hf not more than 0.5 ; C 100 to 300 ppm; B 100 to 500 ppm; Zr 200 to 700 ppm; possibly W up to 4.5; and nickel as the remainder. Components made from these alloys have an excellent microstructural stability when operating at temperatures up to 800.degree. C.Type: GrantFiled: July 30, 1996Date of Patent: September 29, 1998Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "Snecma"Inventors: Catherine Duquenne, Jean Charles Henri Lautridou, Michel Marty, Michele Soucail, Andre Walder
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Patent number: 5759300Abstract: Alloy foils for liquid-phase diffusion bonding of heat-resisting metals in an oxidizing atmosphere comprise 6.0 to 15.0 percent silicon, 0.1 to 2.0 percent manganese, 0.50 to 30.0 percent chromium, 0.10 to 5.0 percent molybdenum, 0.50 to 10.0 percent vanadium, 0.02 to 1.0 percent niobium, 0.10 to 5.0 percent tungsten, 0.01 to 0.5 percent nitrogen, 0.10 to 5.0 percent boron, plus 0.005 to 1.0 percent carbon, and/or either or both of 0.01 to 5.0 percent titanium and 0.01 to 5.0 percent zirconium, all by mass, with the balance comprising nickel and impurities, and have a thickness of 3.0 to 300 .mu.m. Alloy foils for liquid-phase diffusion bonding of heat-resisting metals in an oxidizing atmosphere are also available with substantially vitreous structures.Type: GrantFiled: September 27, 1996Date of Patent: June 2, 1998Assignee: Nippon Steel CorporationInventors: Yasushi Hasegawa, Hisashi Naoi, Yuuichi Satoh, Hiroshi Ukeba
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Patent number: 5728279Abstract: Target for a magnetron-cathode sputtering apparatus is made from a cobalt base alloy containing additional elements in such concentrations that intermetallic phases are formed with at least one of these elements and intermetallic phases are observed on the basis of the phase diagram in the state of equilibrium at the operating temperature of the target. The grain boundaries, sub-grain boundaries, twin-grain boundaries or slip bands of the cobalt mixed crystal forming the matrix are decorated with the elements forming the intermetallic phases. X-ray diffraction diagrams made from the target display reflections of an intermetallic phase which is largely absent in the cast state and which forms only during a heat treatment in the temperature range below the solidus temperature of the alloy by a solid state reaction.Type: GrantFiled: December 15, 1994Date of Patent: March 17, 1998Assignee: Leybold Materials GmbHInventors: Martin Schlott, Martin Weigert, Kwei Teng, Bruce Gehman
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Patent number: 5718867Abstract: An alloy based on a silicide containing at least chromium and molybdenum contains the following constituents in atomic percent: chromium 41-55, molybdenum 13-35 and silicon 25-35, or chromium 35-55, molybdenum 13-35, silicon 13-35, yttrium 0.001-0.3, and/or tungsten 0.001-10. This alloy is distinguished by a high oxidation resistance and still has a mechanical strength at temperatures of over 1000.degree. C. which favors its use as structural material in gas turbines.Type: GrantFiled: September 19, 1995Date of Patent: February 17, 1998Assignee: Asea Broan Boveri AGInventors: Mohammed Nazmy, Corrado Noseda, Markus Staubli
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Patent number: 5683822Abstract: Alloy foils for liquid-phase diffusion bonding of heat-resisting metals in an oxidizing atmosphere comprise 6.0 to 15.0 percent silicon, 0.1 to 2.0 percent manganese, 0.50 to 30.0 percent chromium, 0.10 to 5.0 percent molybdenum, 0.50 to 10.0 percent vanadium, 0.02 to 1.0 percent niobium, 0.10 to 5.0 percent tungsten, 0.05 to 2.0 percent nitrogen, 0.50 to 20.0 percent phosphorus, plus 0.005 to 1.0 percent carbon, and/or either or both of 0.01 to 5.0 percent titanium and 0.01 to 5.0 percent zirconium, all by mass, with the balance comprising nickel and impurities, and have a thickness of 3.0 to 300 .mu.m. Alloy foils for liquid-phase diffusion bonding of heat-resisting metals in an oxidizing atmosphere are also available with substantially vitreous structures.Type: GrantFiled: September 27, 1996Date of Patent: November 4, 1997Assignee: Nippon Steel CorporationInventors: Yasushi Hasegawa, Hisashi Naoi, Yuuichi Satoh, Hiroshi Ukeba
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Patent number: 5626987Abstract: A monophase hydridable material for the negative electrode of a nickel-metal hydride storage battery with a "Lave's phase" structure of hexagonal C14 type (MgZn.sub.2) has the general formula:Zr.sub.1-x Ti.sub.x Ni.sub.a Mn.sub.b Al.sub.c Co.sub.d V.sub.Type: GrantFiled: April 14, 1995Date of Patent: May 6, 1997Assignee: SAFTInventors: Bernard Knosp, Jacques Bouet, Christian Jordy, Michel Mimoun, Daniel Gicquel
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Patent number: 5591394Abstract: A zirconium-based hydrogen storage alloys having the composition formula:Zr.sub.1-x Q.sub.x Cr.sub.1-Y-Z-A-B Mn.sub.Y Fe.sub.Z Co.sub.A V.sub.B Ni(I)wherein Q is Ti or Hf; 0<x.ltoreq.0.3; and 0<Y+Z+A+B<1, are disclosed. The Zr-based hydrogen storage alloy has a C-14 hexagonal structure and is mainly composed of single phase. The alloy is useable for a negative electrode material for secondary batteries. The Zr-based hydrogen storage alloy also has also a discharge capacity of 300.about.377 mAg/g and low reduction of discharge capacity at a low temperature and discharge rate.Type: GrantFiled: June 22, 1994Date of Patent: January 7, 1997Inventors: Jai Y. Lee, Soo R. Kim
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Patent number: 5549797Abstract: Amorphous alloy comprising 30 to 75 atomic % Cr, the remainder being substantially at least one element selected from the group consisting of Ti and Zr and alloys represented by the general formula: X.sub.a Cr.sub.b M.sub.c wherein X is at least one element selected from the group consisting of Ti and Zr; M is at least one element selected from the group consisting of Mg, Al, Fe, Co, Ni, Cu, Mo and W; and a, b, and c are, in atomic percentage, a>20, 20 .ltoreq.b.ltoreq.75, 0<c .ltoreq.20 and a+b+c=100. The alloys are excellent in corrosion resistance and wear resistance, form a stable protective film and are spontaneously passive, even in corrosive environment such as a poorly oxidizing, highly corrosive HCl solution containing chlorine ions.Type: GrantFiled: March 7, 1994Date of Patent: August 27, 1996Assignees: Koji Hashimoto, YKK CorporationInventors: Koji Hashimoto, Hideaki Yoshioka, Asahi Kawashima
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Patent number: 5543109Abstract: A high Cr austenitic heat resistant alloy excellent in high temperature strength which essentially consists of, in weight percent, from more than 0.02% to 0.10% C, not more than 1.0% Si, not more than 2.0% Mn, 28 to 38% Cr, 35 to 60% Ni, from more than 0.5% to 1.5% Ti, not more than 0.05% N, 0.01 to 0.3% Al, 0.001 to 0.01% B, 0 to 0.1% Zr, 0 to 1.0% Nb, one or both of 0.5 to 3.0% Mo and 1.0 to 6.0% W, and the balance being Fe and incidental impurities. The alloy may further contain one or both of 0.001 to 0.05% Mg and 0.001 to 0.05% Ca. This alloy is suitable for producing a single layered tube which is less expensive and more reliable than the conventional double layered tube.Type: GrantFiled: January 31, 1995Date of Patent: August 6, 1996Assignee: Sumitomo Metal Industries, Ltd.Inventors: Hiroyuki Senba, Yoshiatsu Sawaragi
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Patent number: 5532076Abstract: A hydrogen storage alloy preferably used for electrodes in alkaline rechargeable battery is of the general formula: Zr.sub.1.2-a Ti.sub.a Mn.sub.v Al.sub.w Ni.sub.x M.sub.y Cr.sub.z wherein M represents at least one element selected from the group consisting of Si, Zn, Sn, Fe, Mo, Cu and Co; and wherein 0.1.ltoreq.a<1.2, 0.4.ltoreq.v.ltoreq.1.2, 0<w.ltoreq.0.3, 0.8.ltoreq.x.ltoreq.1.6, 0.ltoreq.y.ltoreq.0.2, 0.ltoreq.z.ltoreq.0.3, and 1.7.ltoreq.(v+w+x+y+z).ltoreq.2.7. The alloy has at least one of a C14-type Laves phase of a crystal structure similar to that of MgZn.sub.2 and a C15-type Laves phase of a crystal structure similar to that of MgCu.sub.2 as a main alloy phase.Type: GrantFiled: March 29, 1994Date of Patent: July 2, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuharu Yamamura, Hajime Seri, Yoichiro Tsuji, Naoko Owada, Tsutomu Iwaki
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Patent number: 5514334Abstract: This invention relates to a connection method for a semiconductor material enabling a formation of a bump electrode with a wire bonder, keeping always a cutting position of the wire at a specified position and improving a continuous workability and stability and to a connection material to be used in the connecting method, wherein any one of Pb, Sn, In is applied as a major element and the alloy having additive elements mixed with it is made as a fine wire under a rapid cooling and condensation process and further to a semiconductor device made by the above-mentioned connecting method.Type: GrantFiled: September 30, 1994Date of Patent: May 7, 1996Assignee: Tanaka Denshi Kogyo Kabushiki KaishaInventor: Toshinori Ogashiwa
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Patent number: 5486242Abstract: Tantalum-based and niobium-based alloys made up entirely of a crystalline medium exhibiting a substantially continuous centered cubic structure, comprising an intermetallic compound of formula Ti.sub.2 AlMo, and having the following compositions on an atomic basis:______________________________________ Ta + Cr 20 to 35% Cr 0 to 5% Ti 20 to 40% Al 8 to 20% Mo 8 to 20%, ______________________________________wherein the concentration of Ta is less than 30%; and ______________________________________ Nb + Cr 20 to 60% Cr 0 to 5% Ti 20 to 40% Al 8 to 20% Mo 8 to 20%. ______________________________________ .Type: GrantFiled: May 15, 1995Date of Patent: January 23, 1996Assignee: Office National d'Etudes et de Recherches AerospatialesInventors: Shigehisa Naka, Tasadduq Khan, Andre Walder, Michel Marty, Christophe Delaunay, Pierre Thevenin
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Patent number: 5482577Abstract: An amorphous alloy which is resistant to hot corrosion in sulfidizing and oxidizing atmospheres at high temperatures, consisting of at least one element selected from the group of Al and Cr and at least one element selected from refractory metals of Mo. W, Nb and Ta, a portion of the set forth refractory metals being allowed to be substituted with at least one element selected from Ti, Zr, Fe, Co, Ni and Cu. The addition of Si further improves the alloy oxidation resistance.Type: GrantFiled: October 25, 1994Date of Patent: January 9, 1996Assignees: Koji Hashimoto, YKK CorporationInventors: Koji Hashimoto, Hiroki Habazaki, Stanislaw Mrowec, Marek Danielewski
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Patent number: 5454884Abstract: An amorphous alloy which is resistant to hot corrosion in sulfidizing and oxidizing atmospheres at high temperatures, consisting of at least one element selected from the group of Al and Cr and at least one element selected from refractory metals of Mo. W, Nb and Ta, a portion of the set forth refractory metals being allowed to be substituted with at least one element selected from Ti, Zr, Fe, Co, Ni and Cu. The addition of Si further improves the alloy's oxidation resistance.Type: GrantFiled: October 25, 1994Date of Patent: October 3, 1995Assignees: Kogi Hashimoto, YKK CorporationInventors: Koji Hashimoto, Hiroki Habazakt, Stanislaw Mrowec, Marek Danielewski
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Patent number: 5455119Abstract: A coating composition comprising an alloy having the formula RCrAlR'R" wherein R is nickel, cobalt or the like; R' is yttrium or hafnium and R" is tantalum, rhenium and/or platinum, preferably mixed with an oxide dispersion such as alumina, to provide an improved class of coatings suitable for operating in high temperature oxidizing environments.Type: GrantFiled: November 8, 1993Date of Patent: October 3, 1995Assignees: Praxair S.T. Technology, Inc., Rolls-Royce PLCInventors: Thomas A. Taylor, David F. Bettridge, Robert C. Tucker, Jr.
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Patent number: 5447683Abstract: Dense monolithic SiC or SiC ceramic composites are strongly bonded using brazing compositions which, in their preferred composition, include a braze alloy consisting essentially of less than 50 weight percent silicon and at least two metals from the group of Fe, Cr, Co and V and produce a joint suitable for use in a high neutron flux environment. Brazing is carried out at a temperature of about 1200.degree. to 1500.degree. C. in an inert atmosphere and is complete in about 15 minutes. Broadly, a genus of brazing compounds are disclosed which include between about 10 and about 45 weight percent silicon and at least two elements selected from the following group: Li, Be, B, Na, Mg, P, Sc, Ti, V, Cr, Mn, Fe, Co, Zn, Ga, Ge, As, Rb, Y, Sb, Te, Cs, Pr, Nd, Ta, W and Tl.Type: GrantFiled: November 8, 1993Date of Patent: September 5, 1995Assignee: General AtomicsInventors: Frederick C. Montgomery, Holger H. Streckert