Flake Or Fibrous Constituent Or Fibrous Grain Structure Patents (Class 75/229)
  • Patent number: 9312075
    Abstract: Tantalum powders produced using a tantalum fiber precursor are described. The tantalum fiber precursor is chopped or cut into short lengths having a uniform fiber thickness and favorable aspect ratio. The chopped fibers are formed into a primary powder having a controlled size and shape, narrow/tight particle size distribution, and low impurity level. The primary powder is then agglomerated into an agglomerated powder displaying suitable flowability and pressability such that pellets with good structural integrity and unifrom pellet porosity are manufacturable. The pellet is sintered and anodized to a desired formation voltage. The thusly created capacitor anode has a dual morphology or dual porosity provided by a primary porosity of the individual tantalum fibers making up the primary powder and a larger secondary porosity formed between the primary powders agglomerated into the agglomerated powder.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: April 12, 2016
    Assignee: Greatbatch Ltd.
    Inventors: Yanming Liu, Barry C. Muffoletto, Jason T. Hahl
  • Patent number: 9153354
    Abstract: Compositions are disclosed comprising a plurality of conductive particles wherein each conductive particle comprises a plurality of surface-modified nanoparticles that are covalently bonded to the surface of the conductive particle. Compositions are also disclosed wherein the plurality of conductive particles comprising a plurality of surface-modified nanoparticles covalently bonded thereto, are provided in an organic vehicle.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: October 6, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Jimmie R. Baran, Jeanne M. Bruss, Jeffrey W. McCutcheon, Haeen Sykora
  • Patent number: 8783384
    Abstract: Fibers for diamond-impregnated cutting tools and their associated methods for manufacture and use are described. A matrix is formed that contains fibers made from carbon, glass, ceramic, polymer, and the like. The matrix is then sintered to form a cutting portion of a drill bit. The type and concentration of the fibers can be modified to control the tensile strength and the erosion rate of the matrix to optimize the cutting performance of the tools. Additionally, the fibers may be added to the cutting section to weaken the structure and allow higher modulus binders to be used for the cutting tools at a lower cost, allowing the amount of fibers to be tailored to retain the diamonds in the cutting portion for the desired amount. As the cutting portion erodes, the fibers may also increase the lubricity at the face of the cutting portion.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: July 22, 2014
    Assignee: Longyear TM, Inc.
    Inventors: Kristian S. Drivdahl, Michael D. Rupp
  • Patent number: 8741185
    Abstract: The invention relates to a composite material of formula: (C—N—B-MR)x(Al-MR)y(R)z in which C—N—B-MR is one or more carbides, nitrides or borides of one or more refractory metals of group IV, V or VI of the Periodic Table and/or one or more aluminium carbides, nitrides or borides chosen from Al4C3, AlN, AlB2 and Al1-67B22; Al-MR is one or more aluminides of one or more of the above refractory metals, it being understood that: if MR=Nb, Ta, Hf, Zr, Ti or V, then Al-MR=Al3MR; if MR=W or Cr, then Al-MR=Al4MR; if MR=Mo, then Al-MR=Al8Mo3 or Al17Mo4 (?Al4Mo), and R is a residual component other than carbon, comprising one or more phases chosen from Al4C3, AlN, AlB2, Al1-67B22 and MRtAlu(C—N—B)v in which t, u and v are numbers greater than or equal to zero, and x, y and z are the volume fractions of the respective components with x>y; x+y>0.5; x+y+z+1 and 0.01<y<0.5.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: June 3, 2014
    Assignee: Hydro-Quebec
    Inventors: Robert Schulz, Sylvio Savoie
  • Publication number: 20140020881
    Abstract: A composite article (1; 10; 40) comprises a plurality of inclusions (5) of a magnetocalorically active material embedded in a matrix (4) of a magnetocalorically passive material. The inclusions (5) and the matrix (4) have a microstructure characteristic of a compacted powder.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 23, 2014
    Applicant: Vacuumschmeize GmbH & Co. KG
    Inventors: George Werner REPPEL, Matthias KATTER
  • Patent number: 8551210
    Abstract: A composite article (1; 10; 40) comprises a plurality of inclusions (5) of a magnetocalorically active material embedded in a matrix (4) of a magnetocalorically passive material. The inclusions (5) and the matrix (4) have a microstructure characteristic of a compacted powder.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: October 8, 2013
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Georg Werner Reppel, Matthias Katter
  • Patent number: 8163060
    Abstract: The heat conductivity of an aluminum composite material containing a fibrous carbon material is enhanced. In order to realize this, a spark plasma sintered body having a fibrous carbon material compounded in a metal matrix powder of aluminum or the like is fabricated. At the time of fabrication, an aluminum powder serving as a matrix mother material is compounded with an Al alloy powder such as an Al-12Si powder having a melting point lower than the sintering temperature of the mother material. During the process of sintering the aluminum powder, the Al alloy powder is melted, whereby the heat conductivity between the aluminum powder particles and between the aluminum powder particle and the fibrous carbon material is improved.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: April 24, 2012
    Assignees: Sumitomo Precision Products Co., Ltd., Osaka Prefectural Government
    Inventors: Terumitsu Imanishi, Kazuaki Katagiri, Akiyuki Shimizu, Toyohiro Sato, Nobuhito Nakama, Atsushi Kakitsuji, Katsuhiko Sasaki
  • Patent number: 7878271
    Abstract: A drill bit (20) for connection to a casing string (R), wherein the bit (20) comprises an annular bit face (21) which is built-up by a matrix and which comprises a sintered diamond-metal powder mixture, wherein the bit face (21) includes a plurality of radially orientated liquid delivery slots (16, 23, 26) for cooling and cleansing the bit face (21), wherein at least one of the liquid delivery slots is comprised of an inner slot (23) which extends radially outwards from the inside (24) of the bit face (21), wherein the slot (23) is terminated with an inner bottom (24) in the bit face (21), wherein a further liquid delivery slot comprises an outer slot (26) that extends radially inwards from the outside (27) of the bit face, and wherein said outer slot is terminated with an outer bottom (28) in the bit face (21).
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: February 1, 2011
    Assignee: Atlas Copco Craelius AB
    Inventor: Göran Larbo
  • Patent number: 7722726
    Abstract: The invention provides a method for producing alloy flakes for rare earth sintered magnets, which makes uniform the intervals, size, orientation, and shape of the R-rich region and the dendrites of the 2-14-1 phase, which inhibits formation of chill, and which produces flakes that are pulverized into powder of a uniform particle size in the pulverization step in the production of a rare earth sintered magnet, and that are pulverized into powder compactable into a product with a controlled shrink ratio, and alloy flakes for a rare earth sintered magnet obtained by the method, and a rare earth sintered magnet having excellent magnetic properties.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: May 25, 2010
    Assignee: Santoku Corporation
    Inventors: Kazumasa Shintani, Ryo Murakami, Kazuhiko Yamamoto
  • Publication number: 20100098968
    Abstract: The present invention is directed to composite metal foams comprising hollow metallic spheres and a solid metal matrix. The composite metal foams show high strength, particularly in comparison to previous metal foams, while maintaining a favorable strength to density ratio. The composite metal foams can be prepared by various techniques, such as powder metallurgy and casting.
    Type: Application
    Filed: December 16, 2009
    Publication date: April 22, 2010
    Inventor: Afsaneh Rabiei
  • Patent number: 7695542
    Abstract: Fibers for diamond-impregnated cutting tools and their associated methods for manufacture and use are described. The cutting tools contain a diamond-impregnated cutting portion that contains fibers made from carbon, glass, ceramic, polymer, and the like. The fibers can be in any form, including chopped and milled fibers. The fibers may also be coated with metal, ceramic, or other performance-enhancing coatings. The fibers may be used to both control the tensile strength control the erosion rate of the matrix to optimize the cutting performance of the tools. Additionally, the fibers may also weaken the structure and allow higher modulus binders to be used for the cutting tools at a lower cost, allowing the amount of fibers to be tailored to retain the diamonds in the cutting portion for the desired amount. And as the cutting portion erodes, the fibers may also increase the lubricity at the face of the cutting portion.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: April 13, 2010
    Assignee: Longyear TM, Inc.
    Inventors: Kristian S. Drivdahl, Michael D. Rupp
  • Patent number: 7468089
    Abstract: A self-cleaning porous cermet material, filter and system utilizing the same may be used in filtering particulate and gaseous pollutants from internal combustion engines having intermetallic and ceramic phases. The porous cermet filter may be made from a transition metal aluminide phase and an alumina phase. Filler materials may be added to increase the porosity or tailor the catalytic properties of the cermet material. Additionally, the cermet material may be reinforced with fibers or screens. The porous filter may also be electrically conductive so that a current may be passed therethrough to heat the filter during use. Further, a heating element may be incorporated into the porous cermet filter during manufacture. This heating element can be coated with a ceramic material to electrically insulate the heating element. An external heating element may also be provided to heat the cermet filter during use.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 23, 2008
    Assignee: Battelle Energy Alliance, LLC
    Inventor: Peter C. Kong
  • Publication number: 20080066575
    Abstract: The disclosure provides a rare earth anisotropic hard magnetic material, which has, on atomic percent basis, a composition of (Sm1-?R?)xFe100-x-y-zMyIz, wherein, R is Pr alone or a combination of Pr with at least one rare earth element selected from the group consisting of La, Ce, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y; M is at least one element selected from the group consisting of Si, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Nb, Mo, Al, and Zr; I is N alone or a combination of N and C; 0.01???0.30; 7?x?12, 0.01?y?8.0, 6?z?14.4, and which anisotropic rare earth hard magnetic material is crystallized in a Th2Zn17-type structure, of which crystalline grains are in a flake shape with a gain size ranging from 1 to 5 ?m, and c-axis of the crystalline grains, an easy magnetization direction, being oriented along the minor axis of the flake crystalline grains.
    Type: Application
    Filed: April 13, 2007
    Publication date: March 20, 2008
    Inventor: Yingchang Yang
  • Patent number: 7309391
    Abstract: An aluminum flake pigment containing aluminum flakes as basic particles, said aluminum flakes having an average particle diameter in the range of 3 to 20 ?m and an average value of minimum diameter/maximum diameter of at least 0.6.
    Type: Grant
    Filed: February 16, 2004
    Date of Patent: December 18, 2007
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventor: Keita Nagano
  • Patent number: 7294165
    Abstract: A product in which at least a portion of the product has a nanocrystalline microstructure, and a method of forming the product. The method generally entails machining a body in a manner that produces chips consisting entirely of nano-crystals as a result of the machining operation imposing a sufficiently large strain deformation. The body can be formed of a variety of materials, including metal, metal alloy and ceramic materials. Furthermore, the body may have a microstructure that is essentially free of nano-crystals, and may even have a single-crystal microstructure. The chips produced by the machining operation may be in the form of particulates, ribbons, wires, filaments and/or platelets. The chips are then used to form the product. According to one aspect of the invention, the chips are consolidated to form the product, such that the product is a monolithic material that may contain nano-crystals.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: November 13, 2007
    Assignee: Purdue Research Foundation
    Inventors: Srinivasan Chandrasekar, Walter D. Compton, Thomas N. Farris, Kevin P. Trumble
  • Patent number: 7288325
    Abstract: A hydrogen storage material includes a nano size material that can be formed in a multi-layered core/shell structure and/or in a nanotabular (or platelet) form.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: October 30, 2007
    Assignee: The Pennsylvania State University
    Inventors: Peter C. Eklund, Terumi Furuta, Hajime Goto, Yoshiya Fujiwara, James H. Adair, Jennifer A. Nelson, Kishore Sreenivasan
  • Patent number: 6949216
    Abstract: A system for fabricating a free form structure of a composite material including carbon nanotubes. The system includes a discharge assembly and a composite formation device operatively linked with the discharge assembly. The discharge assembly dispenses a fusing agent such as for example a high energy density emission, a laser emission or a particle beam emission. The composite formation device includes a composite generator and an arranger in operative engagement with a composite generator. The composite generator engages with the fusing agent so as to create a composite nodal element. The composite nodal element includes a matrix and a multiplicity of fibers formed of carbon nanotubes dispersed throughout the matrix. The arranger positions one node relative to another to define the free form structure.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: September 27, 2005
    Assignee: Lockheed Martin Corporation
    Inventors: Craig A. Brice, Frederick J. Herman
  • Patent number: 6936088
    Abstract: The invention relates to a sintered highly porous body comprising at least one layer that is made of a material, which can be sintered and which contains fibers. The aim of the invention is to provide a body of the aforementioned type with improved burn-off properties and values for the flame adherence. To this end, the fibers used are curved on one and/or both sides and they have a principal axis that is shorter than approximately 1 mm and a secondary axis that is shorter than approximately 200 ?m, whereby the principal axis is longer than the secondary axis. The invention also relates to a method for producing the sintered porous bodies and to the use thereof.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: August 30, 2005
    Assignee: GKN Sinter Metals GmbH
    Inventor: Klaus Heiburg
  • Patent number: 6850406
    Abstract: An Nb solid electrolytic capacitor is disclosed which comprises: an anode body made from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; a dielectric layer formed over the surface of the anode body; a solid electrolyte layer formed on the dielectric layer; and a cathode body formed on the surface of the solid electrolyte layer. The Nb solid electrolytic capacitor shows small bias dependence. A method for preparing the same is also disclosed which comprises steps of: forming an anode body from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; forming a dielectric layer over the surface of the anode body; forming a solid electrolyte layer on the dielectric layer; and forming a cathode body on the electrolyte layer.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: February 1, 2005
    Assignee: NEC Tokin Corporation
    Inventors: Tadamasa Asami, Katsuhiro Yoshida, Kunihiko Shimizu, Takashi Kono
  • Patent number: 6838021
    Abstract: The present invention provides water atomized copper powder comprising substantially irregular shaped copper particles having at least a median D50 particle size of from about 10 ?m to about 50 ?m. The powders of the present invention are suitable for use in electrically conductive compositions, such as copper-based adhesives. The present invention also provides methods of making these copper powders.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: January 4, 2005
    Assignee: SCM Metal Products, Inc.
    Inventors: Rajesh Khatter, Anil V. Nadkarni, Hsiao L. Cheng
  • Publication number: 20040166011
    Abstract: The invention relates to a sintered highly porous body comprising at least one layer that is made of a material, which can be sintered and which contains fibers. The aim of the invention is to provide a body of the aforementioned type with improved burn-off properties and values for the flame adherence. To this end, the fibers used are curved on one and/or both sides and they have a principal axis that is shorter than approximately 1 mm and a secondary axis that is shorter than approximately 200 &mgr;m, whereby the principal axis is longer than the secondary axis. The invention also relates to a method for producing the sintered porous bodies and to the use thereof.
    Type: Application
    Filed: September 12, 2003
    Publication date: August 26, 2004
    Inventor: Klaus Heiburg
  • Patent number: 6702869
    Abstract: A niobium powder is described which when formed into an electrolytic capacitor anode, the anode has the capacitance of at least 62,000 CV/g. Methods of making flaked niobium powder which have high capacitance capability when formed into electrolytic capacitor anodes is also described. Besides niobium, the present invention is also applicable to other metals, including valve metals.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: March 9, 2004
    Assignee: Cabot Corporation
    Inventors: Kurt A. Habecker, James A. Fife
  • Patent number: 6639787
    Abstract: Pressed material such as anodes are described and formed from oxygen reduced oxide powders using additives, such as binders and/or lubricants. Methods to form the pressed material are also described, such as with the use of atomizing, spray drying, fluid bed processing, microencapsulation, and/or coacervation.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: October 28, 2003
    Assignee: Cabot Corporation
    Inventors: Jonathon L. Kimmel, Randall V. Redd
  • Patent number: 6583432
    Abstract: The radiation shielding composition and method of the present invention relate to a conformal coating material composed of a matrix of densely packed radiation shielding particles, which are disbursed within a binder. The shielding composition is applied to objects to be protected such as integrated circuits, or to packages therefor, as well as for protecting animals including humans from unwanted exposure to radiation in outer space or other environments.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: June 24, 2003
    Assignee: Maxwell Technologies, Inc.
    Inventors: Michael Featherby, David J. Strobel, Phillip J. Layton, Edward Li
  • Patent number: 6576099
    Abstract: Methods to at least partially reduce a niobium oxide are described wherein the process includes heat treating the niobium oxide in the presence of a getter material and in an atmosphere which permits the transfer of oxygen atoms from the niobium oxide to the getter material, and for a sufficient time and at a sufficient temperature to form an oxygen reduced niobium oxide. Niobium oxides and/or suboxides are also described as well as capacitors containing anodes made from the niobium oxides and suboxides. Anodes formed from niobium oxide powders using binders and/or lubricants are described as well as methods to form the anodes.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: June 10, 2003
    Assignee: Cabot Corporation
    Inventors: Jonathon L. Kimmel, Ricky W. Kitchell
  • Patent number: 6569524
    Abstract: The present invention provides a composite material having comparatively high thermal conductivity and a small coefficient of thermal expansion, which is low cost and preferable as a heatsink material. A graphite powder and an alloy powder, whose main constituent is Ag and Cu, and including Ti, etc., which is selected from the elements belonging to 4A, 5A and 6A groups, are blended together, and are heated at a higher temperature than the melting point of the alloy in a vacuum state or in a gas atmosphere of He, Ar or hydrogen. A coating layer of metal carbide such as TiC is formed on the surface of the graphite grains, and at the same time, they are transformed into a sintered body. The composite material thus obtained is such that the relative density thereof is 70% or more, thermal conductivity thereof is 220 W/m·K or more at room temperature, and the mean coefficient of thermal expansion from the room temperature to 200° C. is 5 through 15×10−6/°C.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: May 27, 2003
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Chihiro Kawai, Hirohiko Nakata
  • 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
  • Patent number: 6421228
    Abstract: A dielectric film formed on a porous valve metal body is contacted with an oxidizing agent and dried. Then, by contacting the dielectric film with a monomer solution for forming an electrolyte layer of electroconductive polymer, a electrolyte layer of a solid electrolytic capacitor is formed by an oxidative polymerization reaction. An oxidative polymerization retarding agent, which delays the oxidative polymerization reaction, is added to at least one of the solutions, an oxidant solution and a monomer solution. The oxidative polymerization retarding agent delays the oxidative polymerization reaction when it contacts with the oxidant and monomer. As a result, the permeation of the monomer for forming an electroconductive polymer layer into small pores increases, and the covering rate of the electroconductive polymer in small pores increases, which improves the capacitance appearance factor and the equivalent series resistance in high frequency region.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: July 16, 2002
    Assignee: NEC Tokin Toyama, Ltd.
    Inventor: Kenji Araki
  • Patent number: 6420043
    Abstract: A flaked niobium powder is disclosed as well as electrolytic capacitors formed from the flaked niobium powders. Niobium powders having a BET surface area of at least about 0.50 m2/g are also disclosed and capacitors made therefrom, as well as niobium powders doped with an oxygen content of at least 2,000 ppm. Methods to reduce DC leakage in a niobium anode are also disclosed.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: July 16, 2002
    Assignee: Cabot Corporation
    Inventors: James A. Fife, Jane Jia Liu, Roger W. Steele
  • Publication number: 20020053257
    Abstract: A system for fabricating a free form structure of a composite material including carbon nanotubes. The system includes a discharge assembly and a composite formation device operatively linked with the discharge assembly. The discharge assembly dispenses a fusing agent such as for example a high energy density emission, a laser emission or a particle beam emission. The composite formation device includes a composite generator and an arranger in operative engagement with a composite generator. The composite generator engages with the fusing agent so as to create a composite nodal element. The composite nodal element includes a matrix and a multiplicity of fibers formed of carbon nanotubes dispersed throughout the matrix. The arranger positions one node relative to another to define the free form structure.
    Type: Application
    Filed: October 24, 2001
    Publication date: May 9, 2002
    Applicant: Lockheed Martin Corporation
    Inventors: Craig A. Brice, Frederick J. Herman
  • Patent number: 6375704
    Abstract: A niobium powder is described which when formed into an electrolytic capacitor anode, the anode has the capacitance of at least 62,000 CV/g. Methods of making flaked niobium powder which have high capacitance capability when formed into electrolytic capacitor anodes is also described. Besides niobium, the present invention is also applicable to other metals, including valve metals.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: April 23, 2002
    Assignee: Cabot Corporation
    Inventors: Kurt A. Habecker, James A. Fife
  • Patent number: 6373685
    Abstract: The present invention relates to capacitor anodes containing a niobium oxide having an atomic ratio of niobium to oxygen of 1:less than 2.5 and being formed at a formation voltage of about 6 volts or higher. The present invention further relates to a niobium oxide having an atomic ratio of niobium to oxygen of 1:less than 2.5, and having a nitrogen content of from about 31,000 ppm N2 to about 130,000 ppm N2. Capacitors containing the various types of niobium oxide are further described.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: April 16, 2002
    Assignee: Cabot Corporation
    Inventors: Jonathon L. Kimmel, Ricky W. Kitchell, James A. Fife
  • Patent number: 6346132
    Abstract: A composite material includes a metallic second phase dispersed in a metallic matrix material. The metallic second phase has a grain structure that is at least partially martensitic. The second phase material is preferably an alloy of nickel and titanium, each present in the range from 48 to 52 atomic %, optionally in combination with further additives. The second phase particles can be present in the form of granular particles, wires, fibers, whiskers, or layers, making up 5 to 60 vol. % of the overall composite material. The matrix material is preferably an aluminum alloy. The composite material has a high damping capacity and a high tensile strength provided by the matrix, and a high damping capacity provided by the second phase. A method of making the composite material involves mixing a powdery matrix material and a powdery second phase material, and then heat and consolidating the mixture at a temperature of 400 to 700 ° C. and a pressure of 100 to 300 MPa.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: February 12, 2002
    Assignee: DaimlerChrysler AG
    Inventors: Ulrike Huber, Rainer Rauh, Eduard Arzt
  • Patent number: 6165623
    Abstract: A flaked niobium powder is disclosed as well as electrolytic capacitors formed from the flaked niobium powders. Niobium powders having a BET surface area of at least about 0.50 m.sup.2 /g are also disclosed and capacitors made therefrom, as well as niobium powders doped with an oxygen content of at least 2,000 ppm. Methods to reduce DC leakage in a niobium anode are also disclosed.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: December 26, 2000
    Assignee: Cabot Corporation
    Inventors: James A. Fife, Jane Jia Liu, Roger W. Steele
  • Patent number: 6143051
    Abstract: A friction material comprising a sintered mass of iron in which graphite particles are dispersed, which sintered mass is formed from between 13 and 22 vol. % of iron fibers, between 13 and 22 vol. % of iron particles having a particle size of 10-400 .mu.m, between 40 and 70 vol. % of graphite particles having a particle size of 25-3000 .mu.m, and between 10 and 15 vol. % of a metallic binder having a melting point of 800-1140.degree. C., and a method of preparing such a friction material, wherein a mixture of these components is compressed at a pressure of at least 100 MPa so as to form a compact having a desired form and size, and where the compact thus formed is sintered at a temperature between 800 and 1140.degree. C. for a period of time which is sufficiently long for achieving concretion of iron fibers, iron particles and metallic binder.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: November 7, 2000
    Assignees: A/S Roulunds Fabriker, Volvo Truck Corporation
    Inventors: Ole Kr.ae butted.mer, Niels Brams.o slashed., Erik Simonsen, Noel De Leon, Knud Strande, Rolf Tornberg, Claes Kuylenstierna
  • Patent number: 6110304
    Abstract: The hydrogen-absorbing alloy electrode for alkaline storage batteries according to the invention comprises a hydrogen absorbing alloy powder prepared by grinding a strip of hydrogen absorbing alloy produced by solidifying a molten alloy by a roll method and satisfying the following relations:r/t.ltoreq.0.5 (1)60.ltoreq.t.ltoreq.180 (2)30.ltoreq.r.ltoreq.90 (3)wherein r represents the mean particle size (.mu.m) of the hydrogen absorbing alloy powder and t represents the mean thickness (.mu.m) of the strip absorbing alloy. The hydrogen absorbing alloy electrode of this invention features an improved high-rate discharge characteristic at low temperature.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: August 29, 2000
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Mitsuzo Nogami, Yoshinori Matsuura, Mamoru Kimoto, Nobuyuki Higashiyama, Mitsunori Tokuda, Takahiro Isono, Ikuo Yonezu, Koji Nishio
  • Patent number: 6077327
    Abstract: There is disclosed a method of producing an aluminum composite material in which the content of silicon carbide can be made higher as compared with conventional methods, and the production cost is low, and the method can be carried out easily. An aluminum composite material of low-thermal expansion and high-thermal conductivity is produced by this method. A mixture of powder of aluminum metal or an alloy thereof and silicon carbide powder is pressurized and compacted to form a green compact. Subsequently, this green compact is charged into a mold, and is heated and compacted into a predetermined shape at a temperature not less than a melting point of the aluminum metal or the alloy thereof.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: June 20, 2000
    Assignee: Hitachi Metals, Ltd.
    Inventors: Shigeyuki Hamayoshi, Satoshi Fukui, Kenichiro Shimizu, Masahiko Ohshima
  • Patent number: 6051044
    Abstract: A nitrogen containing niobium powder is disclosed as well as electrolytic capacitors formed from the niobium powders. Methods to reduce DC leakage in a niobium anode are also disclosed.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: April 18, 2000
    Assignee: Cabot Corporation
    Inventor: James A. Fife
  • Patent number: 6048379
    Abstract: The present invention is related to a family of materials that may act as a replacement for lead in applications where the high density of lead is important, but where the toxicity of lead is undesirable. The present invention more particularly provides a high density material comprising tungsten, fiber and binder. Methods and compositions of such materials and applications thereof are disclosed herein.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: April 11, 2000
    Assignee: Ideas to Market, L.P.
    Inventors: Alan V. Bray, Brian A. Muskopf, Michael L. Dingus
  • Patent number: 6004370
    Abstract: A sintered friction material especially suitable for use in a braking system has a matrix of a copper-system metal such as copper, tin, nickel and aluminum, and contains a specific additive, graphite and potassium titanate as friction conditioners. The specific additive consists of at least one material selected from a group consisting of zirconium oxide, silica, dolomite, orthoclase and magnesium oxide. The specific additive, the graphite and the potassium titanate are preferably blended in volume ratios of 1 to 15%, 10 to 50% and 5 to 30% respectively. The form of the potassium titanate is at least one of whiskery, platy and spherical forms and preferably plate-like or spherical. The sintered friction material has good abrasion resistance, low abrasion of the counterpart, a high friction coefficient, excellent material strength, good chattering resistance, and good squealing resistance.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: December 21, 1999
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takatoshi Takemoto, Yukinori Yamashita
  • Patent number: 5964967
    Abstract: A treatment process for a composite comprising a matrix of a precipitation hardenable aluminum alloy and a particulate or short fiber ceramic reinforcement. The process includes hot and/or cold working the composite, subjecting the composite to a controlled heating step in which the composite is raised from ambient temperature to a temperature of from 250 to 450.degree. C. at a rate of temperature increase less than 1000.degree. C. per hour, and subjecting the resulting heat treated composite to a solution treating step.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: October 12, 1999
    Assignees: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland, Defence Research Agency
    Inventors: Timothy Frederick Bryant, Simon Brian Dodd, Stephen Mark Flitcroft, William Sinclair Miller, Roger Moreton, Christopher John Peel
  • Patent number: 5935485
    Abstract: A piezoelectric material includes a PZT ceramic, and a noble metal component. The noble metal component is added to the PZT ceramic in an amount of 0.35 parts by volume or more with respect to 100 parts by volume of the PZT ceramic, and is at least one element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt and Au, or is an alloy of silver (Ag) and the noble metal element. A piezoelectric element includes a pair of external electrodes, at least a pair of piezoelectric layers, and a conductive layer. The piezoelectric layers are formed of the PZT ceramic, and are disposed between the external electrodes. The conductive layer is formed of the noble metal component, and is insulated from the external electrodes. The piezoelectric layers and the conductive layer are formed lamellarly, and are laminated alternately in a direction connecting the external electrodes.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: August 10, 1999
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Takao Tani, Hiroaki Makino, Nobuo Kamiya
  • Patent number: 5865912
    Abstract: Described herein is an SiC-reinforced aluminum alloy composite material of the type having silicon carbide uniformly dispersed in an aluminum alloy matrix containing magnesium as a strengthening element, characterized in that the composite material contains Al4C3 in an amount smaller than 0.5 wt % and residual oxygen in an amount smaller than 0.4 wt %, and has a modulus of elasticity higher than 9000 kgf/mm.sup.2.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: February 2, 1999
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hiroyuki Morimoto, Kenichiro Ouchi, Hiroshi Iwamura
  • Patent number: 5841041
    Abstract: A porous mold material is provided that contains pores for ventilation in a metal casting, which pores range from 20 to 50 microns, and wherein the porosity value of the porous mold material ranges from 25 to 35% by volume. A method is further provided of producing a porous mold material that contains pores ranging from 20 to 50 microns for ventilation in casting, which method is characterized in that the mixing ratio of stainless steel particles to stainless steel short fibers is from 40 wt %:60 wt % to 65 wt %:35 wt %. The porous mold material of this invention does not have defects such as the inferior fluidity of a molten metal in the mold, or the shrinkage and blowholes in cast products.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: November 24, 1998
    Assignee: Sintokogio, Ltd.
    Inventors: Norihiro Asano, Tatsuhiko Kato
  • Patent number: 5529600
    Abstract: A material for friction components made by a process including the steps of providing a first powder consisting of grains of a comparatively harder material with a comparatively higher coefficient of friction and an average grain size of from 60 to 100 microns, and a second powder consisting of grains of comparatively softer material with a comparatively lower coefficient of friction and an average grain size of from 60 to 100 microns; mixing the first powder and the second powder to form a powder mixture having a total volume; and subjecting the powder mixture to a pressure and temperature sufficient for the grains of the first powder to be intermixed with the comparatively softer material of the second powder so that the comparatively harder material substantially fills an intergranular space between the grains of the first powder to form the material for the friction components, the comparatively harder material occupying from 1/3 to 4/5 of the total volume of the powder mixture.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: June 25, 1996
    Assignee: Sintermetal S.A.
    Inventors: Antonio R. Fernandez, Pascal Belair, Jean R. Gras
  • Patent number: 5508116
    Abstract: A metal matrix composite reinforced with shape memory alloy is disclosed ch is formed by blending metal particles and shape memory alloy particles to form a homogeneous powder blend, and consolidating the powder blend to form a unitary mass. The unitary mass is then plastically deformed such as by extrusion in the presence of heat so as to cause an elongation thereof, whereby the metal particles form a matrix and the shape memory alloy partices align in the direction of elongation of the unitary mass. The composite can be used in structural applications and will exhibit shape memory characteristics.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: April 16, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David J. Barrett
  • Patent number: 5501728
    Abstract: The present invention relates to a friction material for use in manufacturing various friction bearing components such as brakes, clutches, couplings, transmission systems and the like. The composition of the friction material includes a base friction material and a metal sulfide-iron powder alloy mixture which is added to the base material and further mixed prior to compression molding the desired component.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: March 26, 1996
    Assignee: Brake Pro, Inc.
    Inventors: Christopher C. Shepley, David R. Carter
  • Patent number: 5470371
    Abstract: Articles having improved strength at high temperature are made from near-eutectic nickel-base superalloys. In such alloys, the improved properties are achieved by preventing the formation of a dispersed second phase during the production of alloy powder. After the powder is consolidated, a dispersion of the second phase is developed through thermal treatment. Consolidation may be achieved by direct application of pressure, or by incremental solidification processes. Some of these alloys are formulated to achieve additional strengthening by precipitation hardening.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: November 28, 1995
    Assignee: General Electric Company
    Inventor: Ramgopal Darolia
  • Patent number: 5418071
    Abstract: In the present invention, metal silicide grains form an interlinked structure of a metal silicide phase, and Si grains which form a Si phase are discontinuously dispersed between the metal silicide phase to provide a sputtering target having a high density two-phased structure and having an aluminum content of 1 ppm or less. Because of the high density and high strength of the target, the generation of particles from the target during sputtering is reduced, and due to the reduced carbon content of the target, the mixing of carbon into the thin film during sputtering can be prevented.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: May 23, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Michio Satou, Takashi Yamanobe, Takashi Ishigami, Mituo Kawai, Noriaki Yagi, Toshihiro Maki, Minoru Obata, Shigeru Ando
  • Patent number: RE47560
    Abstract: Tantalum powders produced using a tantalum fiber precursor are described. The tantalum fiber precursor is chopped or cut into short lengths having a uniform fiber thickness and favorable aspect ratio. The chopped fibers are formed into a primary powder having a controlled size and shape, narrow/tight particle size distribution, and low impurity level. The primary powder is then agglomerated into an agglomerated powder displaying suitable flowability and pressability such that pellets with good structural integrity and unifrom pellet porosity are manufacturable. The pellet is sintered and anodized to a desired formation voltage. The thusly created capacitor anode has a dual morphology or dual porosity provided by a primary porosity of the individual tantalum fibers making up the primary powder and a larger secondary porosity formed between the primary powders agglomerated into the agglomerated powder.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: August 6, 2019
    Assignee: Greatbatch Ltd.
    Inventors: Yanming Liu, Barry C. Muffoletto, Jason T. Hahl