Rare Earth Oxide Patents (Class 419/20)
  • Patent number: 10102929
    Abstract: A method of a nuclear fuel pellet including a thermal conductive metal and a nuclear fuel pellet prepared thereby. The method includes preparing an oxide nuclear fuel granule having about 30%-45% theoretical density, mixing the fuel granule with thermal conductive metal powder, compacting the fuel granule with which the thermal conductive metal powder is mixed to prepare a green pellet, and sintering the green pellet. In the method, the sintering may be performed under a reducing gas atmosphere that is the same as the commercial pellet preparing process. Thus, compatibility compared to existing commercial preparing processes may be superior. Also, since a liquefied oxide formation process and a reducing process are omitted, the distribution uniformity of the metal material within the pellet may be superior. Therefore, the nuclear fuel pellet in which the metal network and fine microstructure are uniformly distributed within the pellet may be prepared.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: October 16, 2018
    Assignee: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Dong-Joo Kim, Young Woo Rhee, Keon-Sik Kim, Jong-Hun Kim, JangSoo Oh, Jae-Ho Yang, Yang-Hyun Koo
  • Patent number: 9982562
    Abstract: A sintered alloy includes, in percentage by mass, Cr: 10.37 to 39.73, Ni: 5.10 to 24.89, Si: 0.14 to 2.52, Cu: 1.0 to 10.0, P: 0.1 to 1.5, C: 0.18 to 3.20 and the balance of Fe plus unavoidable impurities; a phase A containing precipitated metallic carbide with an average particle diameter of 10 to 50 ?m; and a phase B containing precipitated metallic carbide with an average particle diameter of 10 ?m or less, wherein the phase A is randomly dispersed in the phase B and the average particle diameter DA of the precipitated metallic carbide in the phase A is larger than the average particle diameter DB of the precipitated metallic carbide of the phase B.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: May 29, 2018
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Daisuke Fukae, Hideaki Kawata
  • Publication number: 20140328711
    Abstract: In the method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material of the present invention, the degree of alignment of the magnet can be improved by preparing the pre-sintered alloy material, the particle size of the powder ground by the jet mill can be refined and the fine powder in the filter of the jet mill can be mixed with the powder collected by the cyclone collector by controlling the oxygen content of the jet mill and adding the nanoscale oxide fine powder. The present invention can significantly improve the utilization ratio of the material and the performance of the magnet, save the use of the rare earth, and especially the heavy rare earth, thereby protecting the scare resources.
    Type: Application
    Filed: October 9, 2013
    Publication date: November 6, 2014
    Applicant: China North Magnetic & Electronic Technology Co., LTD
    Inventor: Haotian Sun
  • Publication number: 20140322063
    Abstract: A process for producing an FePt-based sputtering target includes adding metal oxide powder containing unavoidable impurities to FePt-based alloy powder containing Pt in an amount of 40 at % or more and less than 60 at % and one or more kinds of metal elements other than Fe and Pt in an amount of more than 0 at % and 20 at % or less with the balance being Fe and unavoidable impurities and with a total amount of Pt and the one or more kinds of metal elements being 60 at % or less so that the metal oxide powder accounts for 20 vol % or more and 40 vol % or less of a total amount of the FePt-based alloy powder and the metal oxide powder, followed by mixing the FePt-based alloy powder and the metal oxide powder to produce a powder mixture.
    Type: Application
    Filed: July 14, 2014
    Publication date: October 30, 2014
    Inventors: Takanobu MIYASHITA, Yasuyuki GOTO, Takamichi YAMAMOTO, Ryousuke KUSHIBIKI, Masahiro AONO, Masahiro NISHIURA
  • Patent number: 8758476
    Abstract: Provided are a method of producing mixed powder comprising noble metal powder and oxide powder, wherein powder of ammonium chloride salt of noble metal and oxide powder are mixed, the mixed powder is subsequently roasted, and ammonium chloride is desorbed by the roasting process in order to obtain mixed powder comprising noble metal powder and oxide powder, and mixed powder comprising noble metal powder and oxide powder, wherein chlorine is less than 1000 ppm, nitrogen is less than 1000 ppm, 90% or more of the grain size of the noble metal powder is 20 ?m or less, and 90% or more of the grain size of the oxide powder is 12 ?m or less. Redundant processes in the production of noble metal powder are eliminated, and processes are omitted so that the inclusion of chlorine contained in the royal water and nitrogen responsible for hydrazine reduction reaction is eliminated as much as possible.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: June 24, 2014
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Atsutoshi Arakawa, Kazuyuki Satoh, Atsushi Sato
  • Patent number: 8568539
    Abstract: According to one embodiment, a permanent magnet is provided with a sintered body having a composition represented by R(FepMqCurCo1-p-q-r)zOw (where, R is at least one element selected from rare-earth elements, M is at least one element selected from Ti, Zr and Hf, and p, q, r, z and w are numbers satisfying 0.25?p?0.6, 0.005?q?0.1, 0.01?r?0.1, 4?z?9 and 0.005?w?0.6 in terms of atomic ratio). The sintered body has therein aggregates of oxides containing the element R dispersed substantially uniformly.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: October 29, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yosuke Horiuchi, Shinya Sakurada, Keiko Okamoto, Masaya Hagiwara
  • Patent number: 8545684
    Abstract: Disclosed herein is a method of making a sensing element comprising forming an electrically conductive element, wherein the sensing element comprises a metal selected from the group consisting of Pd and alloys and combinations comprising Pd; and wherein the electrically conductive element is thermally stable at temperatures as high as 1,200° C.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: October 1, 2013
    Assignee: Delphi Technologies, Inc.
    Inventors: Fenglian Chang, Kerry J. Kruske, Rick D. Kerr
  • Publication number: 20130218281
    Abstract: A method of pressure forming a brown part from metal and/or ceramic particle feedstocks includes: introducing into a mold cavity or extruder a first feedstock and one or more additional feedstocks or a green or brown state insert made from a feedstock, wherein the different feedstocks correspond to the different portions of the part; pressurizing the mold cavity or extruder to produce a preform having a plurality of portions corresponding to the first and one or more additional feedstocks, and debinding the preform. Micro voids and interstitial paths from the interior of the preform part to the exterior allow the escape of decomposing or subliming backbone component substantially without creating macro voids due to internal pressure. The large brown preform may then be sintered and subsequently thermomechanically processed to produce a net wrought microstructure and properties that are substantially free the interstitial spaces.
    Type: Application
    Filed: April 30, 2010
    Publication date: August 22, 2013
    Applicant: ACCELLENT INC.
    Inventors: Mark W. Broadley, James Alan Sago, Hao Chen, Edward J. Schweitzer, John Eckert, Jeffrey M. Farina
  • Patent number: 8318045
    Abstract: Disclosed is a radiation shielding member having improved radiation absorption performance, including 80.0˜99.0 wt % of a polymer matrix or metal matrix and 1.0˜20.0 wt % of a radiation shielding material in the form of nano-particles having a size of 10˜900 nm as a result of pulverization, wherein the radiation shielding material is homogeneously dispersed in the matrix through powder mixing or melt mixing after treatment with a surfactant which is the same material as the matrix or which has high affinity for the matrix. A preparation method thereof is also provided. This radiation shielding member including the nano-particles as the shielding material further increases the collision probability of the shielding material with radiation, compared to conventional shielding members including micro-particles, thus reducing the mean free path of radiation in the shielding member, thereby exhibiting superior radiation shielding effects.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: November 27, 2012
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Jaewoo Kim, Young Rang Uhm, Byungchul Lee, Jinwoo Jung, Chang Kyu Rhee, Min-Ku Lee, Hee Min Lee, Sang Hoon Lee
  • Patent number: 8114340
    Abstract: The present invention relates to the field of solid state capacitors, and in particular to capacitors that have an anode body formed of porous valve action material, such as tantalum, niobium or niobium monoxide. According to one aspect of the present invention, there is provided a method of forming capacitor anode bodies from valve action material comprising the steps of: providing a capacitor grade powder of the valve action material, charging the powder into a press mold, compacting the powder in the mold so as to shape the powder into an anode body shape, stabilizing the body shape, for example by sintering of the material to form an inter-connected porous body, characterized in that the molding process involves the use of a lubricant applied locally to lubricate the interface between an outside surface of the anode body and a molding surface of the mold.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: February 14, 2012
    Assignee: AVX Corporation
    Inventors: Colin McCracken, Nigel Patrick Grant
  • Patent number: 7776131
    Abstract: A manufacturing method for an oxide-dispersed alloy wherein dispersed particles consisting of oxides of one or two or more additive metals are dispersed in a matrix metal, comprising the steps of (a) manufacturing alloy powder or an alloy wire rod consisting of the matrix metal and the additive metal; (b) oxidizing the additive metal in the alloy powder by water to form dispersed particles by introducing the alloy powder or alloy wire rod into a high-energy ball mill with water and by making agitation; and (c) moldedly solidifying the alloy powder or alloy wire rod after oxidation. The present invention is especially useful in manufacturing oxide-dispersed alloys in which the free energy of oxide formation of the matrix metal is higher than water standard free energy of formation, and the free energy of oxide formation of the additive metal is lower than water standard free energy of formation.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: August 17, 2010
    Assignee: Tanaka Kikinzoku Kogyo K.K.
    Inventors: Toru Shoji, Seiichiro Tanaka, Seiji Takeishi, Hideo Segawa
  • Patent number: 7722804
    Abstract: In a method of manufacturing a pressed scandate dispenser cathode, firstly, scandium nitrate, barium nitrate, calcium nitrate, aluminum nitrate and ammonium metatungstate (AMT) are dissolved in de-ionized water, respectively, and then mixed with a solution of a cross-link agent such as citric acid and H2O2. After water bathing, the mixed aqueous solution turns into gel, and the powders are obtained after the gel calcination. Secondly, the calcined powders are reduced by hydrogen. Finally, the reduced powders are pressed into shapes and then sintered in the furnace with the atmosphere of hydrogen or by Spark Plasma Sintering (SPS 3.202-MK-V) in vacuum.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: May 25, 2010
    Assignee: Beijing University of Technology
    Inventors: Jinshu Wang, Wei Liu, Meiling Zhou, Yiman Wang, Hongyi Li, Tieyong Zuo
  • Publication number: 20100061875
    Abstract: A method of making a combustion turbine component includes forming a nanosized powder including a plurality of metals and at least one rare-earth element and agglomerating the nanosized powder to form a microsized powder including a plurality of metals and at least one rare-earth element. The microsized powder is processed to form a cohesive metallic mass and a primary aging heat treating is performed on the cohesive metallic mass. A solution heat treating may be performed on the cohesive metallic mass prior to the primary aging heat treating. A secondary aging treating may be performed on the cohesive metallic mass after the primary aging treating.
    Type: Application
    Filed: September 8, 2008
    Publication date: March 11, 2010
    Applicant: Siemens Power Generation, Inc.
    Inventors: Anand A. Kulkarni, Allister W. James, Douglas J. Arrell
  • Publication number: 20090229976
    Abstract: Sputtering target materials have improved film-sputtering properties by containing finer metal oxide particles. A process for producing a sputtering target material including a cobalt/chromium/platinum matrix phase and an oxide phase that includes two or more metal oxides including at least chromium oxide wherein the oxide phase is in the form of particles, includes sintering material powder to form the sputtering target material wherein the material powder contains chromium oxide at not less than 1.0 mol % based on the material powder.
    Type: Application
    Filed: March 10, 2009
    Publication date: September 17, 2009
    Applicant: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Kazuteru KATO, Junichi KIYOTO
  • Publication number: 20090075824
    Abstract: To provide an RE-based oxide superconducting sintered body that can be used as a target applicable to a laser ablation method without bonding it to a backing plate, and a manufacturing method of the same. Each kind of powder or solution is prepared, and when a composition formula of an RE-based oxide superconductor is expressed by REaBabCucOx, raw materials are weighed and mixed so as to satisfy a+b+c=6, 0.95<a<1.05 and 1.505?c/b<1.6, and thereafter calcinations, pulverization, sintering, pulverization, and molding are carried out to obtain the RE-based oxide superconducting sintered body, and this RE-based oxide superconducting sintered body is used as a laser ablation target.
    Type: Application
    Filed: August 11, 2006
    Publication date: March 19, 2009
    Inventor: Masahiro Kojima
  • Publication number: 20090053089
    Abstract: A method of making a homogeneous granulated metal-based powder, comprises steps of: providing preselected amounts of at least one metal element or metal alloy, at least one ceramic compound, and/or at least one non-metallic element; forming a homogeneous slurry/suspension or wet mixture comprising the preselected amounts of metal element(s) and/or metal alloys, ceramic compound(s), and/or non-metallic element(s), a liquid phase comprising at least one liquid, and at least one binder material; drying the slurry/suspension or mixture to remove at least a portion of the liquid phase and form a powder mixture comprising partially or completely dried granules; and subjecting the granules to a thermal de-binder process for effecting: additional removal of any remaining liquid phase, if necessary; removal of the at least one binder material; reduction of carbon content; reduction of oxygen on the surfaces or interior of the metal or metal alloy phases in the granules; and optional partial sintering for strengthening
    Type: Application
    Filed: August 20, 2007
    Publication date: February 26, 2009
    Applicant: HERAEUS INC.
    Inventors: Fenglin YANG, Carl Derrington, Bernd Kunkel
  • Patent number: 7488443
    Abstract: An electrically conducting cermet comprises at least one transition metal element dispersed in a matrix of at least one refractory oxide selected from the group consisting of yttria, alumina, garnet, magnesium aluminum oxide, and combinations; wherein an amount of the at least one transition metal element is less than 15 volume percent of the total volume of the cermet. A device comprises the aforementioned electrically conducting cermet.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: February 10, 2009
    Assignee: General Electric Company
    Inventors: Bernard Patrick Bewley, Bruce Alan Knudsen, James Anthony Brewer, James Scott Vartuli, Dennis Joseph Dalpe, Mohamed Rahmane
  • Publication number: 20080070084
    Abstract: A fuel electrode precursor of low shrinkage rate in an electric power generation cell for a solid oxide fuel cell is provided, wherein: the fuel electrode precursor is made of a sintered body prepared from a green body constituted with oxide ceramic grains composed of at least one of yttria-stabilized zirconia, scandia-stabilized zirconia, samarium-doped ceria and gadolinium-doped ceria and metal oxide grains composed of at least one of nickel oxide, copper oxide and ruthenium oxide; and the fuel electrode precursor at least has a structure in which an iron-containing oxide is present in a grain boundary surrounding the metal oxide grains.
    Type: Application
    Filed: September 19, 2006
    Publication date: March 20, 2008
    Inventors: Tatsumi Ishihara, Takashi Yamada
  • Patent number: 7186288
    Abstract: A method of production of large Ingots of neutron attenuating composites using a vacuum-bellows system allows for large cross-sectional shapes to be extruded and rolled. This method uses a vacuum-bellows technology which allows the manufacturing of large 8–16 inch diameter ingots (50–450 lbs. each). A variety of primary metal matrix materials can be used in this technology. High specific strength and stiffness can be achieved because the technology allows for final densities of 99% and higher. The vacuum-bellows technology allows metals and ceramics to blend and mesh together at compression pressures of 800 tons with elevated temperatures. The controlled compression movement allows for any oxide layer, on the metal, to be broken up and consolidated with the chosen ceramic particulate.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: March 6, 2007
    Inventor: Robin A. Carden
  • Patent number: 7147686
    Abstract: A rare earth magnet comprises rare earth magnet particles and a rare earth oxide being present between the rare earth magnet particles. The rare earth oxide is represented by a following general formula (I): R2O3??(I) where R is any one of terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: December 12, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tetsurou Tayu, Hideaki Ono, Munekatsu Shimada, Makoto Kano
  • Patent number: 7144642
    Abstract: A ferrite magnet obtained by adding a ferrite having a hexagonal W-type magnetoplumbite structure to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one element that is selected from the group consisting of the rare-earth elements (including Y) and Bi and that always includes La, during the fine pulverization process thereof. By adding a small amount of the element such as Co, Ni, Mn or Zn to the ferrite already having the hexagonal M-type magnetoplumbite structure during the fine pulverization process thereof, the magnetic properties can be improved.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: December 5, 2006
    Assignee: Neomax Co., Ltd.
    Inventors: Etsushi Oda, Seiichi Hosokawa, Sachio Toyota
  • Patent number: 7037463
    Abstract: A metallic article is prepared by first furnishing at least one nonmetallic precursor compound, wherein all of the nonmetallic precursor compounds collectively containing the constituent elements of the metallic article in their respective constituent-element proportions. The constituent elements together form a titanium-base alloy having a stable-oxide-forming additive element therein, such as magnesium, calcium, scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, and mixtures thereof. The stable-oxide-forming additive element forms a stable oxide in a titanium-based alloy. At least one additive element is present at a level greater than its room-temperature solid solubility limit in the titanium-base alloy. The precursor compounds are chemically reduced to produce an alloy material, without melting the alloy material. The alloy material may be consolidated.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: May 2, 2006
    Assignee: General Electric Company
    Inventors: Andrew Philip Woodfield, Clifford Earl Shamblen, Eric Allen Ott, Michael Francis Xavier Gigliotti
  • Patent number: 6991686
    Abstract: To provide a method for producing a magnetostrictive material of excellent magnetostrictive characteristics. The method for producing a magnetostrictive material, wherein a mixture composed of Starting Materials A, B and C is sintered, where A is represented by Formula 1 (TbxDy1-x)Ty (T is at least one metallic element selected from the group consisting of Fe, Ni and Co, 0.35<x?0.50 and 1.70?y?2.00), B is represented by Formula 2 DytT1-t (0.37?t?1.00), and C contains T, to produce a magnetostrictive material represented by Formula 3 (TbvDy1-v)Tw (0.27?v<0.50, and 1.70?w?2.00), wherein oxygen content is set at 500 to 3,000 ppm for Starting Material A and at 2,000 to 7,000 ppm for Starting Material B.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: January 31, 2006
    Assignee: TDK Corporation
    Inventors: Seigo Tokoro, Teruo Mori
  • Patent number: 6984271
    Abstract: A rare earth magnet to be used in a motor. The rare earth magnet comprises rare earth magnet particles. Additionally, a rare earth oxide is present among the rare earth magnet particles, the rare earth oxide being represented by the following general formula (I): R2xR?2(1?x)O3??(I) where each of R and R? is one element selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb) and lutetium (Lu), and 0<x<1.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: January 10, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tetsurou Tayu, Takae Ono, legal representative, Makoto Kano, Munekatsu Shimada, Yoshio Kawashita, Takeshi Yamauchi, Hideaki Ono, deceased
  • Patent number: 6746545
    Abstract: An R—Fe—B permanent magnet wherein R is Nd or a combination of Nd with a rare earth element is prepared by casting an R—Fe—B alloy, crushing the alloy in an oxygen-free atmosphere of argon, nitrogen or vacuum, effecting comminution, compaction, sintering, aging, and cutting and/or polishing the magnet to give a finished surface. The magnet is then heat treated in an argon, nitrogen or low-pressure vacuum atmosphere having a limited oxygen partial pressure, obtaining a highly oil resistant sintered permanent magnet having corrosion resistance and hydrogen barrier property even in a high pressure hot environment of refrigerant and/or lubricant as encountered in compressors.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: June 8, 2004
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Kazuo Tamura, Masanobu Shimao, Ryuji Hamada, Takehisa Minowa
  • Publication number: 20040060390
    Abstract: A method of production of large Ingots of neutron attenuating composites using a vacuum-bellows system allows for large cross-sectional shapes to be extruded and rolled. This method uses a vacuum-bellows technology which allows the manufacturing of large 8-16 inch diameter ingots (50-450 lbs. each). A variety of primary metal matrix materials can be used in this technology. High specific strength and stiffness can be achieved because the technology allows for final densities of 99% and higher. The vacuum-bellows technology allows metals and ceramics to blend and mesh together at compression pressures of 800 tons with elevated temperatures. The controlled compression movement allows for any oxide layer, on the metal, to be broken up and consolidated with the chosen ceramic particulate. One application is to blend boron-rich ceramics and high purity (99.5-99.99%) aluminum particulates together and produce a large ingot using this vacuum-bellows technology.
    Type: Application
    Filed: September 9, 2002
    Publication date: April 1, 2004
    Inventor: Robin A. Carden
  • Patent number: 6648984
    Abstract: A compact is produced from an alloy powder for R—Fe—B type rare earth magnets including particles having a size in a range of about 2.0 &mgr;m to about 5.0 &mgr;m as measured by a light scattering method using a Fraunhofer forward scattering in a proportion of approximately 45 vol. % or more and particles having a size larger than about 10 &mgr;m in a proportion of less than about 1 vol. %. The compact is then sintered to obtain a R—Fe—B type rare earth magnet having an average crystal grain size in a range of about 5 &mgr;m to about 7.5 &mgr;m, and an oxygen concentration in a range of about 2.2 at. % to about 3.0 at. %.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: November 18, 2003
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Shigeru Takaki, Ken Makita
  • Patent number: 6554984
    Abstract: A method of manufacturing a gas sensor, including a substrate electrode layer forming step, and a surface electrode layer forming step. The gas sensor includes first and second processing spaces, an oxygen concentration detection element, an oxygen pumping element, an oxidation catalyst and a combustible gas component concentration detection element.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: April 29, 2003
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Ryuji Inoue, Shoji Kitanoya, Kenji Kato, Tomohiro Fuma, Takafumi Oshima
  • Patent number: 6551371
    Abstract: A titanium-based composite material according to the present invention is characterized in that it comprises: a matrix containing a titanium (Ti) alloy as a major component, and titanium compound particles and/or rare-earth element compound particles dispersed in the matrix, wherein the matrix contains 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O), the titanium compound particles occupy 1-10% by volume, and the rare-earth element compound particles occupy 3% by volume or less. With this arrangement, it is possible to obtain a titanium material, which is good in terms of the heat resistance, hot working property, specific strength, and so on.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: April 22, 2003
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha
    Inventors: Tadahiko Furuta, Takashi Saito, Hiroyuki Takamiya, Toshiya Yamaguchi
  • Publication number: 20030049150
    Abstract: The invention relates to a process for producing a shaped body from metal foam, comprising the following steps:
    Type: Application
    Filed: May 13, 2002
    Publication date: March 13, 2003
    Inventors: Robert F Singer, Carolin Korner
  • Publication number: 20020112785
    Abstract: A nanocomposite permanent magnet and method of producing same, wherein the magnet includes a complex of:
    Type: Application
    Filed: December 18, 2001
    Publication date: August 22, 2002
    Inventors: Shigenobu Sekine, Hiroji Sato, Koichi Niihara, Minoru Narita, Tomohide Takami, Isao Kusunoki
  • Patent number: 6368376
    Abstract: Disclosed is a process for making an oxide dispersion-strengthened tungsten heavy alloy by mechanical alloying that includes the steps of: adding 0.1 to 5 wt. % of Y2O3 powder to a mixed powder comprising more than 90 wt. % of tungsten powder, and nickel and iron powders for the rest; and subjecting the resulting mixture to a mechanical alloying to prepare an oxide dispersion-strengthened tungsten heavy alloy powder. The oxide dispersion-strengthened tungsten heavy alloy prepared by the mechanical alloying is characterized in that fine Y2O3 particles are uniformly dispersed in the matrix which are stable at high temperatures results in enhanced high-temperature strength and a reduction of the shearing strain of the fraction during high strain rate deformation.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: April 9, 2002
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Soon Hyung Hong, Ho Jin Ryu
  • Publication number: 20020002879
    Abstract: Disclosed is a process for making an oxide dispersion-strengthened tungsten heavy alloy by mechanical alloying that includes the steps of: adding 0.1 to 5 wt. % of Y2O3 powder to a mixed powder comprising more than 90 wt. % of tungsten powder, and nickel and iron powders for the rest; and subjecting the resulting mixture to a mechanical alloying to prepare an oxide dispersion-strengthened tungsten heavy alloy powder. The oxide dispersion-strengthened tungsten heavy alloy prepared by the mechanical alloying is characterized in that fine Y2O3 particles are uniformly dispersed in the matrix which are stable at high temperatures results in enhanced high-temperature strength and a reduction of the shearing strain of the fracture during high-speed shear deformation.
    Type: Application
    Filed: December 12, 2000
    Publication date: January 10, 2002
    Inventors: Soon Hyung Hong, Ho Jin Ryu
  • Publication number: 20020001534
    Abstract: The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.
    Type: Application
    Filed: April 20, 2001
    Publication date: January 3, 2002
    Inventors: Futoshi Kuniyoshi, Koki Tokuhara, Kunitoshi Kanno, Hitoshi Morimoto, Tomoiku Ohtani, Ryoji Ono
  • Patent number: 6328817
    Abstract: There is provided a powder for permanent magnet comprising needle-like fine particles of Fe or Fe—Co alloy as a base material, a hard magnetic layer and a separation layer of an oxide of rare earth element provided outside said hard magnetic layer.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: December 11, 2001
    Assignee: Santoku Metal Industry Co., Ltd.
    Inventor: Ryo Murakami
  • Patent number: 6270547
    Abstract: A hydrogen absorbing alloy electrode characterized in that the electrode consists mainly of a mixture of a first hydrogen absorbing alloy powder A formed on surfaces of particles thereof with a surface layer 22 containing metallic copper or a copper oxide and a second hydrogen absorbing alloy powder B formed on surfaces of particles thereof with a surface layer 24 containing metallic cobalt or a cobalt oxide. The copper-coated hydrogen absorbing alloy powder A affords improved electric conductivity, and the cobalt-coated hydrogen absorbing alloy powder B gives improved ability to absorb and desorb hydrogen, whereby the electrode is improved in different battery characteristics, such as cycle characteristics, high-rate discharge characteristics and infernal pressure characteristics, at the same time.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: August 7, 2001
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Teruhiko Imoto, Kikuko Kato, Yohei Hirota, Nobuyuki Higashiyama, Mamoru Kimoto, Shin Fujitani, Koji Nishio
  • Patent number: 6238454
    Abstract: Heat-dissipating microcircuit substrate, having coefficients of thermal expansion adjusted to match the materials of the microcircuit mounted thereupon, are manufactured by powder metallurgy using carbides resulting from the combination of various types of carbons and wetting agents.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: May 29, 2001
    Inventors: Frank J. Polese, Glen B. Engle, Vladimir Ocheretyansky
  • Patent number: 6218025
    Abstract: A sintered electrode of high-melting metal (for example tungsten) is produced from spherical metal powder having a well defined particle size. The mean particle size is from 5 to 70 &mgr;m. The particle size distribution covers a range from at most 20% below to at most 20% above the mean particle size.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: April 17, 2001
    Assignee: Patent- Truchand-Gesellschaft fuer Elektrische Gluelampen mbH
    Inventors: Dietrich Fromm, Bernhard Altmann, Wolfram Graser, Peter Schade
  • Patent number: 6150048
    Abstract: Disclosed are a metallic interconnection material for solid oxide fuel cells and a preparation method thereof. The metallic interconnection material has two fine microstructural phases in which 5-25% by volume of LaCrO.sub.3 is dispersed at the grain boundaries of Cr particles. It can be prepared by mixing 75-95% by volume of a Cr powder and 5-25% by volume of an LaCrO.sub.3 powder, together with a solvent and a binder, in a mill, molding the mixture into a predetermined shape after drying, and sintering the molded shape at approximately 1,500.degree. C. for 10 hours in an Ar atmosphere with 5 vol % of hydrogen to give an LaCrO.sub.3 -dispersed Cr alloy. The LaCrO.sub.3 -dispersed Cr alloy shows high electric conductivity by virtue of the growth inhibition of Cr particles during sintering and high chemical stability by virtue of the presence of the rare earth metal, La, meeting meet the requirements for the interconnection materials for solid oxide fuel cells.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: November 21, 2000
    Assignee: Korea Institute of Energy Research
    Inventors: Rak-Hyun Song, Dong-Ryul Shin, Kwangg-Sun Jeon, Yi-Sup Han, Dokiya Masayuki
  • Patent number: 6132676
    Abstract: The invention provides techniques for forming composites including XW.sub.2 O.sub.8, where X=Zr, Hf, or a combination, dispersed within a continuous, metal matrix. A low to zero coefficient of thermal expansion material, with high thermal and electrical conductivity, results. One method for forming the composite involves coating particles of XW.sub.2 O.sub.8 with a layer of metal, then isostatically pressing the particles under conditions amenable to formation of a composite. The technique of coating, with a more malleable phase, a phase that undergoes a disadvantageous phase transformation of decomposition upon exposure to a threshold pressure at a set temperature can be applied to a variety of materials.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: October 17, 2000
    Assignees: Massachusetts Institute of Technology, Electrovac GESMBH
    Inventors: Hermann Holzer, David C. Dunand
  • Patent number: 5989491
    Abstract: A process for producing an oxide dispersion strengthened heat resisting powder metallurgy alloy, characterized in that (1) zirconium and/or a rare earth element, such as yttrium, cerium, or lanthanum, are previously added as an oxide former element to a molten mother alloy, (2) an atomizing gas composed of an argon or nitrogen gas containing not more than 5.0% by volume of oxygen is used in the step of gas-atomizing the molten mother alloy, and (3) in the step of consolidating and molding the gas-atomized alloy powder by rolling, forging, HIP, or hot extrusion, the alloy powder is sieved to a particle diameter of not more than 110 .mu.m before this step. The oxide dispersion strengthened heat resisting powder metallurgy alloy is characterized in that (1) zirconium and/or a rare earth element, such as yttrium, cerium, or lanthanum, are contained in an amount of 0.05 to 3.0% by weight and (2) the powder metallurgy consolidated, molded product prepared by consolidation of the powdery metallurgy alloy contains 0.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: November 23, 1999
    Assignee: Sanyo Special Steel Co., Ltd.
    Inventors: Tatsuro Isomoto, Tadanori Kida
  • Patent number: 5937264
    Abstract: A composite oxygen electrode/electrolyte structure for a solid state electrochemical device having a porous composite electrode in contact with a dense electrolyte membrane, which electrode includes: (a) a porous structure having interpenetrating networks of an ionically-conductive material and an electronically-conductive material; and (b) an electrocatalyst different from the electronically-conductive material, dispersed within the pores of the porous structure. This electrode structure is relatively simple to manufacture, requiring relatively few steps to infiltrate an electrocatalyst precursor material to obtain an electrode structure which will perform advantageously in a solid oxide fuel cell, has a relatively low internal resistance, and permits the selection of an optimal electronically-conductive material and electrocatalyst.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: August 10, 1999
    Assignee: The Dow Chemical Company
    Inventor: Sten A. Wallin
  • Patent number: 5915160
    Abstract: High strength gold wire for use in microelectronics and a method of producing the same are disclosed. In the methods of the present invention, a gold alloy having gold and a dilute rare earth (RE) element is produced. Next, the gold alloy is atomized into a powder. The dilute RE element is at least partially oxidized during atomization. Then, the powder is consolidated into an oxide dispersion strengthened gold billet. Finally, gold wire is formed from the oxide dispersion strengthened gold billet. The high strength gold wire can be drawn to a diameter less than conventional gold wire, while still maintaining mechanical and electrical properties, thereby facilitating microelectronics miniaturization.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: June 22, 1999
    Assignee: Rockwell International
    Inventors: Phillip D. Krotz, David D. Hillman, Nicole L. DeBlieck Cavanah
  • Patent number: 5881355
    Abstract: A method of fabricating a cathode member or pellet is provided, which realizes the sufficiently large increase of the electron emission capability by the current activation process and that prevents the maximum cathode current from being lowered as long as an electron emissive agent exists in the cathode member. First, (a) a nickel powder and a rare-earth-metal oxide powder are provided. (b) The nickel powder and the rare-earth-metal oxide powder are uniformly mixed together, thereby producing a first powder mixture. (c) The first powder mixture is heated in a hydrogen atmosphere, an inert atmosphere, or a vacuum atmosphere, thereby producing an intermetallic compound of nickel and the rare-earth metal in the first powder mixture. (d) The first powder mixture containing the intermetallic compound is uniformly mixed with an electron-emissive agent powder, thereby producing a second powder mixture. (e) The second powder mixture is sintered by a HIP process, thereby forming a cathode member.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: March 9, 1999
    Assignee: NEC Corporation
    Inventors: Toshikazu Sugimura, Maki Narita, Taro Hirai, Shoichi Hata
  • Patent number: 5868876
    Abstract: A wet-doping process for producing an oxide-dispersion strengthened (ODS), creep-resistant molybdenum alloy is disclosed. The alloy is made by adding nitrate or acetate salts of lanthanum, cerium, thorium, or yttrium to molybdenum oxide to produce a slurry, heating the slurry in a hydrogen atmosphere to produce a powder, mixing and cold isostatically pressing the powder, sintering in a hydrogen atmosphere, and thermomechanically processing (swaging, extruding, cold drawing) the product. The ODS molybdenum alloy produced by the process contains 2-4% by volume (.about.1-4% by weight) of an oxide of lanthanum, cerium, thorium, or yttrium. The alloy has high strength and improved creep-resistance at temperatures greater than 0.55T.sub.m of molybdenum.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: February 9, 1999
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Robert Bianco, R. William Buckman, Jr., Clint B. Geller
  • Patent number: 5815791
    Abstract: A process for manufacturing a structural element with brazed-on, bent or folded metal foil components having a foil thickness of less than 500 .mu.m, made of an ODS sintered ferrous material. The sintered material is manufactured by mechanically alloying the basic powders, hot pressing and/or extruding, and subsequently hot-rolling, cold-rolling and final recrystalization annealing to form the sintered material into a foil having improved mechanical strength properties. After the cold-rolling step, the foil material is annealed so that the foil may be thereafter bent and folded at room temperature. The bent and/or folded foil is recrystallization-annealed at a temperature between 1100.degree. and 1300.degree. C. during 3-600 minutes, simultaneously with a brazing operation, in a single process step.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: September 29, 1998
    Assignee: Schwarzkopf Technologies Corporation
    Inventor: Dieter Sporer
  • Patent number: 5796019
    Abstract: A method of manufacturing an electrically conductive cermet that includes less than 35% by volume of a precious metal by mixing a powdered refractory ceramic with the powdered metal, molding the mixture into a green, and sintering the green to create a cermet with a dense ceramic phase and a metallic phase in the form of a coherent network. The object is good electric conductivity at a low metal content. The precious metal powder is selected to shrink less and exhibits less sintering tendency as it forms the metallic phase than does the ceramic powder as it forms the ceramic phase.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: August 18, 1998
    Assignees: W.C. Heraeus GmbH, Friatec AG
    Inventors: David Francis Lupton, Jorg Schielke, Hans-Joachim Graf, Arno Reckziegel
  • Patent number: 5774780
    Abstract: A process for the production of a shaped part which is produced from a high-melting point metal powder with crystalline sinter-activating additives. The process includes the steps of preparing, compressing and sintering the metal powder. Prior to the sintering step, the final contour of the shaped part is substantially shaped. The process is primarily directed for the production of shields for radiation protection, as melting crucibles or as electrodes.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: June 30, 1998
    Assignee: Bayerische Metallwerke GmbH
    Inventor: Oliver Prause
  • Patent number: 5742891
    Abstract: A wire for fabrication of a vibration resistant filament for an incandescent lamp. The wire includes about 0.05-1.00 weight percent lanthanum oxide dispersed in a tungsten matrix and has a microstructure including stringers of fine particles of lanthanum oxide extending parallel to the wire axis. During primary recrystallization of a vibration resistant lamp filament from the filament wire, the stringers produce a microstructure in the filament exhibiting sufficient grain boundary segments extending generally axially along the length of the filament to render the filament resistant to vibration. A method for producing a vibration resistant filament for an incandescent lamp is also disclosed.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: April 21, 1998
    Assignee: Osram Sylvania Inc.
    Inventors: Thomas J. Patrician, Harry D. Martin, III
  • Patent number: 5695544
    Abstract: A silicon nitride based sintered product having strength at a high temperature is obtained by sintering a mixture. The mixture comprises a silicon powder or a mixture powder of silicon and silicon nitride added a sintering assistant powder, a compound powder of iron and a compound powder containing at least one of vanadium, niobium and tantalum in 5a group elements of the periodic table. The silicon nitride based sintered product contains silicon, aluminum, yttrium, oxygen, nitrogen, iron and at least one of 5a group element in the periodic table, and when weights at which the elements are present as a compound of silicon nitride, alumina, yttria, a compound powder of iron and 5a group elements in the periodic table are represented by a, b, c, d and e, the following formulae are fulfilled:1.ltoreq.100(b+c+d+e).times.(a+b+c+d+e).ltoreq.15, 1.ltoreq.(b+c)/d0.005.ltoreq.100d/(a+b+c+d+e).ltoreq.7.5, and 0.005.ltoreq.e/(b+c).ltoreq.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: December 9, 1997
    Assignee: Isuzu Ceramics Research Institute Co., Ld.
    Inventor: Toshiyuki Yamada