Patents Assigned to AT&T Corp.
  • Publication number: 20200238477
    Abstract: There is provided a vitrified bond super-abrasive grinding wheel including: a core; and a super-abrasive grain layer provided on the core, wherein the super-abrasive grain layer includes a plurality of super-abrasive grains and a vitrified bond that joins the plurality of super-abrasive grains, and the vitrified bond has a plurality of bond bridges located between the plurality of super-abrasive grains to join the plurality of super-abrasive grains, not less than 80% of the plurality of super-abrasive grains are joined to the super-abrasive grains adjacent thereto by the bond bridges, and not less than 90% of the plurality of bond bridges in a cross section of the super-abrasive grain layer have a thickness equal to or smaller than an average grain size of the super-abrasive grains, and have a length greater than the thickness.
    Type: Application
    Filed: September 18, 2018
    Publication date: July 30, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Shuichi AMINO, Tomohiro ISHIZU
  • Publication number: 20200230708
    Abstract: An outer peripheral cutting edge located on a rear side in a rotation axis direction of the inclined cutting edge, a rotation diameter of the base metal on the rear side in the rotation axis direction of the outer peripheral cutting edge is smaller than a rotation diameter of the outer peripheral cutting edge, in a cross section perpendicular to a direction in which the inclined cutting edge extends, a cutting edge ridge of the inclined cutting edge has a roundness of a radius less than or equal to 30 ?m, and a maximum height difference value of the cutting edge ridge of the inclined cutting edge is less than or equal to 20 ?m.
    Type: Application
    Filed: September 18, 2018
    Publication date: July 23, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Yuma MIYAZAKI, Kentaro SHIRO
  • Publication number: 20200156213
    Abstract: There is provided a super-abrasive grain including: a body composed of cubic boron nitride or diamond; and a ceramic coating film coating at least a portion of a surface of the body.
    Type: Application
    Filed: December 6, 2018
    Publication date: May 21, 2020
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Akito ISHII, Katsumi OKAMURA, Tomokazu NAKAMURA, Nobuhide NAKAMURA
  • Publication number: 20200066505
    Abstract: A tungsten electrode material contains a tungsten-based material and oxide particles dispersed in the tungsten-based material. The oxide particles are composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution. A content of the rare-earth oxide with respect to a total amount of the Zr oxide and/or the Hf oxide and the rare-earth oxide is not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution is not lower than 0.5 mass % and not higher than 9 mass %, and the remainder is composed substantially of tungsten.
    Type: Application
    Filed: March 23, 2018
    Publication date: February 27, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Seiji NAKABAYASHI, Tomohiro TAKIDA
  • Patent number: 10553519
    Abstract: A heat radiating member includes: a composite portion composed of a composite material which contains particles of a satisfactorily thermally conductive material in a metal matrix; and a metal layer formed on at least one surface of the composite portion and composed of a metal. A method for producing a heat radiating member includes: a preparation step to prepare a composite material which contains particles of a satisfactorily thermally conductive material in a metal matrix; a powder arrangement step to dispose a metal powder composed of metal particles on at least one surface of the composite material; and a heating step to heat the composite material and the metal powder, with the metal powder disposed on the composite material, to form a metal layer composed of a metal of the metal powder on a composite portion composed of the composite material.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: February 4, 2020
    Assignees: A.L.M.T. Corp, Sumitomo Electric Industries, Ltd.
    Inventors: Tatsuya Morikawa, Takanori Kadokura, Isao Iwayama
  • Patent number: 10465266
    Abstract: The present heat-resistant tungsten alloy has a first phase containing W as a major component, a second phase having a carbonitride of at least one element of Ti, Zr and Hf and containing the carbonitride as a major component when W is removed, and a third phase having a carbide of at least one element of group 5A elements in the periodic table and containing the carbide as a major component when W is removed, the heat-resistant tungsten alloy having a Vickers hardness of 550 Hv or more at a room temperature, a displacement of 1 mm or more when leading to fracture, as determined in a three point bending test at 1200° C., and a 0.2% proof stress of 900 MPa or more, as determined in the three point bending test at 1200° C.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: November 5, 2019
    Assignee: A.L.M.T. CORP.
    Inventors: Ayuri Tsuji, Shigekazu Yamazaki, Akihiko Ikegaya, Noboru Uenishi
  • Publication number: 20190329308
    Abstract: A shaped diamond die includes a polycrystalline diamond, the polycrystalline diamond having a machining hole, wherein a length D of a side of the machining hole is 100 ?m or less, a corner R is 20 ?m or less, the shaped diamond die includes a bearing portion, a surface roughness Sa of the bearing portion is 0.05 ?m or less, and an average grain size of the polycrystalline diamond is 500 nm or less.
    Type: Application
    Filed: December 8, 2017
    Publication date: October 31, 2019
    Applicant: A.L.M.T. Corp.
    Inventors: Toshiaki SHINDO, Takuya ASANUMA
  • Publication number: 20190297725
    Abstract: A composite member includes a substrate composed of a composite material containing a metal and a non-metal. One surface of the substrate has spherical warpage of which radius of curvature R is not smaller than 5000 mm and not greater than 35000 mm. A sphericity error is not greater than 10.0 ?m, the sphericity error being defined as an average distance between a plurality of measurement points on a contour of a warped portion of the substrate and approximate arcs defined by the plurality of measurement points. The substrate has a thermal conductivity not lower than 150 W/m·K and a coefficient of linear expansion not greater than 10 ppm/K.
    Type: Application
    Filed: November 8, 2017
    Publication date: September 26, 2019
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Isao IWAYAMA, Shigeki KOYAMA, Masashi OKAMOTO, Yuta INOUE, Hiroyuki KONTANI, Takehisa YAMAMOTO
  • Patent number: 10307888
    Abstract: A superabrasive wheel having a superabrasive grain layer having superabrasive grains fixed by a binder, a ratio of an area occupied by the superabrasive grains in the superabrasive grain layer being 20% to 70%.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: June 4, 2019
    Assignee: A.L.M.T. Corp.
    Inventors: Masanori Hoshika, Hikaru Yamazaki, Hirohisa Koterasawa, Kenji Fukushima
  • Publication number: 20190092638
    Abstract: A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.
    Type: Application
    Filed: October 21, 2016
    Publication date: March 28, 2019
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato, Tomoyuki Ishida, Akihide Matsumoto, Takehiko Hayashi
  • Patent number: 10215512
    Abstract: [Problem] To provide a heat spreader capable of removing heat from an element more efficiently and immediately than an existing one, and also capable of satisfactorily responding to further enhancement in performance and output of various apparatuses, and a method for efficiently manufacturing the same. [Solution] A heat spreader includes a Cu—Mo layer made of a Cu—Mo composite material and having an average thickness of less than or equal to 0.6 mm and a variation in thickness of less than or equal to 0.1 mm, and a Cu layer directly stacked on each of both surfaces thereof. A method for manufacturing the heat spreader includes planarizing a plate material of the Cu—Mo composite material constituting the Cu—Mo layer, and roll-bonding a Cu plate constituting the Cu layer to each of both surfaces thereof.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: February 26, 2019
    Assignee: A.L.M.T. Corp.
    Inventors: Hiroaki Oki, Tadashi Arikawa, Shouichi Inaba
  • Publication number: 20190039211
    Abstract: A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder.
    Type: Application
    Filed: November 28, 2016
    Publication date: February 7, 2019
    Applicant: A.L.M.T. Corp.
    Inventor: Nobuhide Nakamura
  • Patent number: 10174410
    Abstract: A heat-resistant molybdenum alloy of this invention comprises a first phase containing Mo as a main component and a second phase comprising a Mo—Si—B-based intermetallic compound particle phase, wherein the balance is an inevitable impurity and wherein the Si content is 0.05 mass % or more and 0.80 mass % or less and the B content is 0.04 mass % or more and 0.60 mass % or less.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: January 8, 2019
    Assignee: A.L.M.T. Corp.
    Inventors: Takanori Kadokura, Hidenobu Nishino, Ayuri Tsuji, Shigekazu Yamazaki, Akihiko Ikegaya
  • Patent number: 10100390
    Abstract: A heat-resistant member comprising a molybdenum alloy that comprises a first phase containing Mo as a main component and a second phase comprising a Mo—Si—B-based intermetallic compound particle phase, wherein the balance is an inevitable impurity and wherein the Si content is 0.05 mass % or more and 0.80 mass % or less and the B content is 0.04 mass % or more and 0.60 mass % or less. The member may be coated.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: October 16, 2018
    Assignee: A.L.M.T. Corp.
    Inventors: Takanori Kadokura, Hidenobu Nishino, Ayuri Tsuji, Shigekazu Yamazaki, Akihiko Ikegaya
  • Patent number: 10011890
    Abstract: A method of producing sodium tungstate of this invention including allowing cemented carbide scrap containing tungsten to react with a molten salt containing sodium sulfate and having added thereto a metal oxide, to thereby obtain sodium tungstate.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: July 3, 2018
    Assignee: A.L.M.T. Corp.
    Inventors: Takeshi Itakura, Akihiko Ikegaya, Yoshiharu Yamamoto
  • Patent number: 9970082
    Abstract: A heat-resistant alloy that satisfies physical properties such as proof stress and hardness adapted to an increase in the melting point of a welding object compared to conventional alloys is provided. The heat resistant alloy includes a first phase, as a main component, containing a Mo or W metal phase, a second phase containing a Mo—Si—B—based alloy, and a third phase containing titanium carbonitride, wherein the balance is inevitable compounds and inevitable impurities.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: May 15, 2018
    Assignee: A.L.M.T.CORP.
    Inventors: Shigekazu Yamazaki, Ayuri Tsuji, Masahiro Katoh, Akihiko Ikegaya
  • Patent number: 9884367
    Abstract: A Mo—Si—B-based alloy for a heat-resistant alloy that satisfies, more than conventional, physical properties such as proof stress and hardness adapted to an increase in the melting point of 5 a welding object. The Mo—Si—B-based alloy powder is such that the full width at half maximum of (600) of Mo5SiB2 in X-ray diffraction peak data is 0.08 degrees or more and 0.7 degrees or less.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: February 6, 2018
    Assignee: A.L.M.T. Corp.
    Inventors: Shigekazu Yamazaki, Ayuri Tsuji, Masahiro Katoh, Seiji Nakabayashi, Akihiko Ikegaya
  • Patent number: 9803291
    Abstract: An object of this invention is to provide a crucible for growing a sapphire single crystal, which is optimized for providing a sapphire single crystal and is reusable. A crucible for growing a sapphire single crystal of this invention includes: a base material (3) containing molybdenum as a main component and having a crucible shape; and a coating layer (5) with which only an inner periphery of the base material (3) is coated and which is formed of tungsten and inevitable impurities, in which the coating layer (5) has a surface roughness Ra of 5 ?m or more and 20 ?m or less.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: October 31, 2017
    Assignee: A.L.M.T. Corp.
    Inventors: Masahiro Katoh, Makoto Watanabe
  • Patent number: D839444
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: January 29, 2019
    Assignee: A.L.M.T. CORP.
    Inventors: Yoshitake Fukaya, Masahiro Kato, Makoto Watanabe, Kiyohide Sasaki
  • Patent number: D872872
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: January 14, 2020
    Assignee: A.L.M.T. CORP.
    Inventors: Yoshitake Fukaya, Masahiro Kato, Makoto Watanabe, Kiyohide Sasaki