Heat Treatment Patents (Class 148/121)
  • Patent number: 10199910
    Abstract: Methods for forming a motor core having separately processed stator and rotor laminations are disclosed. The stator and rotor laminations may be formed from a single electrical steel source, such as a sheet or coil. The methods may include forming and heat treating a first portion of the steel source to form stator laminations having a first microstructure (e.g., mean grain size) and magnetic and mechanical properties (e.g., core loss). They may further include forming and heat treating a second portion of the steel source to form rotor laminations having a second microstructure that is different from the first and magnetic and mechanical properties that are different from the stator laminations. The stator laminations may have improved core loss and permeability performance and the rotor laminations may have improved mechanical properties. By separating the processing, each core may have properties tailored to conditions that they will experience in operation.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: February 5, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Feng Liang, Leyi Zhu, C Bing Rong
  • Patent number: 10168392
    Abstract: A method includes producing an amorphous precursor to a nanocomposite, the amorphous precursor comprising a material that is substantially without crystals not exceeding 20% volume fraction; performing devitrification of the amorphous precursor, wherein the devitrification comprises a process of crystallization; forming, based on the devitrification, the nanocomposite with nano-crystals that contains an induced magnetic anisotropy; tuning, based on one or more of composition, temperature, configuration, and magnitude of stress applied during annealing and modification, the magnetic anisotropy of the nanocomposite; and adjusting, based on the tuned magnetic anisotropy, a magnetic permeability of the nanocomposite.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: January 1, 2019
    Assignees: Carnegie Mellon University, SPANG, INC., U.S. Department of Energy
    Inventors: Alex M. Leary, Paul R. Ohodnicki, Michael E. McHenry, Vladimir Keylin, Joseph Huth, Samuel J. Kernion
  • Patent number: 10128041
    Abstract: A magnetic core includes soft magnetic material particles each including a soft magnetic material and an insulating film on a surface of the soft magnetic material, the insulating film having a thickness in the range of 10 nm or more and 100 nm or less; and a binder that binds the soft magnetic material particles together and contains a non-silicate glass having a softening point in the range of 350° C. or higher and 500° C. or lower. The soft magnetic material contains an amorphous phase and has a transition temperature of 600° C. or lower at which a crystal structure changes, and the magnetic core has a resistivity of 107 ?cm or more.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: November 13, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Sadaaki Sakamoto, Yuya Ishida
  • Patent number: 9869000
    Abstract: Methods of making bainitic steels may involve austenitizing a quantity of steel by exposing the quantity of steel to a first temperature. A composition of the quantity of steel may be configured to impede formation of non-bainite ferrite, pearlite, and Widmanstätten ferrite. The quantity of steel may be heat-treated to form bainite by exposing the quantity of steel to a second, lower temperature. The second, lower temperature may be stabilized by exposing the quantity of steel to the second, lower temperature in the presence of a thermal ballast.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: January 16, 2018
    Assignee: Battelle Energy Alliance, LLC
    Inventors: Michael Paul Bakas, Henry Shiu-Hung Chu, Thomas Andrew Zagula, Benjamin Robert Langhorst
  • Patent number: 9773591
    Abstract: An article for magnetic heat exchange comprising a magnetocalorically active phase with a NaZn13-type crystal structure is provided by hydrogenating a bulk precursor article. The bulk precursor article is heated from a temperature of less than 50° C. to at least 300° C. in an inert atmosphere and hydrogen gas only introduced when a temperature of at least 300° C. is reached. The bulk precursor article is maintained in a hydrogen containing atmosphere at a temperature in the range 300° C. to 700° C. for a selected duration of time, and then cooled to a temperature of less than 50° C.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: September 26, 2017
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Matthias Katter, Volker Zellmann
  • Patent number: 9773595
    Abstract: An alloy is provided which consists of Fe100-a-b-c-d-x-y-zCuaNbbMcTdSixByZz and up to 1 at % impurities, M being one or more of the elements Mo, Ta and Zr, T being one or more of the elements V, Mn, Cr, Co and Ni, Z being one or more of the elements C, P and Ge, 0 at %?a<1.5 at %, 0 at %?b<2 at %, 0 at %?(b+c)<2 at %, 0 at %?d<5 at %, 10 at %<x<18 at %, 5 at %<y<11 at % and 0 at %?z<2 at %. The alloy is configured in tape form and has a nanocrystalline structure in which at least 50 vol % of the grains have an average size of less than 100 nm, a hysteresis loop with a central linear region, a remanence ratio Jr/Js of <0.1 and a coercive field strength Hc to anisotropic field strength Ha ratio of <10%.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: September 26, 2017
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Giselher Herzer, Christian Polak, Viktoria Budinsky
  • Patent number: 9741927
    Abstract: A method and system for providing a magnetic junction usable in a magnetic device are described. The magnetic junction includes a reference layer, a nonmagnetic spacer layer and a free layer. The nonmagnetic spacer layer is between the reference layer and the free layer. The free layer has a gradient in a magnetic ordering temperature such that a first portion of the free layer has a first magnetic ordering temperature higher than a second magnetic ordering temperature of a second portion of the free layer. The first portion of the free layer is closer to the reference layer than the second portion of the free layer. The magnetic junction is configured such that the free layer is switchable between stable magnetic states when a write current is passed through the magnetic junction.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: August 22, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dmytro Apalkov, Alexey Vasilyevitch Khvalkovskiy
  • Patent number: 9604278
    Abstract: The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 ?m or less.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: March 28, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Hiroshi Shibasaki, Takayuki Motegi, Hajime Itagaki, Jun Sunakawa, Yoshio Bizen
  • Patent number: 9484140
    Abstract: A method and a system for continuously in-line annealing a forwarding ferromagnetic amorphous alloy ribbon in a curved shape to improve its magnetic properties without causing the ribbon to become brittle and which operates at significant high ribbon feeding rates. The amorphous alloy ribbon is fed forward, tensioned and guided along a path at a preset feeding rate and is heated at a point along the path at a rate greater than 103° C./sec to a temperature to initiate a thermal treatment. Then the ribbon is initially cooled at a rate greater than 103° C./sec until the thermal treatment ends. During the thermal treatment, a series of mechanical constraints is applied on the ribbon until the amorphous alloy ribbon adopts a specific shape at rest after the thermal treatment is ended. After the initial cooling, the amorphous alloy ribbon is subsequently cooled at a sufficient rate to a temperature that will preserve the specific shape.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: November 1, 2016
    Assignee: HYDRO-QUEBEC
    Inventors: Bruno Francoeur, Pierre Couture
  • Patent number: 9460836
    Abstract: The present invention provides a powder for a magnet which can form a rare earth magnet having excellent magnetic characteristics and which has excellent moldability, a method for producing the powder for a magnet, a powder compact, and a rare earth-iron-boron-based alloy material.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: October 4, 2016
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Toru Maeda, Asako Watanabe
  • Patent number: 9449752
    Abstract: It is an objective of the invention to provide a dust core made of an Fe-based amorphous metal powder having excellent magnetic properties, in which the dust core has a higher-than-conventional density, excellent magnetic properties and a high mechanical strength. There is provided a dust core including a mixture powder compacted, the mixture powder including: an Fe-based amorphous metal powder having a crystallization temperature Tx (unit: K), the Fe-based amorphous metal powder being plastically deformed, the plastically deformed metal Fe-based amorphous metal powder having a filling factor in the dust core higher than 80% and not higher than 99%; and a resin binder having a melting point Tm (unit: K), in which the Tx and Tm satisfy a relationship of “Tm/Tx?0.70”.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: September 20, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventors: Masami Taguchi, Shigeho Tanigawa, Shin Noguchi
  • Patent number: 9443652
    Abstract: Provided are a soft magnetic core having an excellent high current DC biased characteristic and an excellent core loss characteristic and a manufacturing method thereof. The method includes the steps of: after classifying nanocrystalline grains obtained by grinding metal ribbons prepared by using a rapid solidification process (RSP), mixing alloy powders so that a particle size distribution is configured to have a particle size of 75˜100 ?m with 10˜85 wt %, a particle size of 50˜75 ?m with 10˜70 wt %, and a particle size 5˜50 ?m with 5˜20 wt %, to thus prepare the soft magnetic cores by using nanocrystalline alloy powders having an excellent high current DC biased characteristic and an excellent core loss characteristic.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: September 13, 2016
    Assignee: AMOGREENTECH CO., LTD.
    Inventors: Se Joong Yoon, Mi Rae Kim
  • Patent number: 9324403
    Abstract: Voltage controlled magnetic tunnel junctions and memory devices are described which provide efficient high speed switching of non-volatile magnetic devices at high cell densities. Implementations are described which provide a wide range of voltage control alternatives with in-plane and perpendicular magnetization, bidirectionally switched magnetization, and control of domain wall dynamics.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: April 26, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Pedram Khalili Amiri, Kang L. Wang, Kosmas Galatsis
  • Patent number: 9040168
    Abstract: The galvannealed steel sheet includes: a galvannealed layer formed on at least one surface of a steel sheet and contains includes an amount of 0.05 mass % to 0.5 mass % of Al, an amount of 6 mass % of 12 mass % of Fe, and the balance composed of Zn and inevitable impurities; and a mixed layer formed on a surface of the galvannealed layer and includes a composite oxide of Mn, Zn, and P and an aqueous P compound, wherein the composite oxide includes 0.1 mg/m2 to 100 mg/m2 of Mn, an amount of 1 mg/m2 to 100 mg/m2 of P, and Zn, and a P/Mn ratio is 0.3 to 50, and wherein the total size of an area of the mixed layer in which an attached amount of P is equal to or more than 20 mg/m2 is 20% to 80% of a surface area of the mixed layer.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 26, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuhiko Honda, Noriyuki Suzuki, Yoichi Ikematsu
  • Publication number: 20150115749
    Abstract: A magnetic component having intermixed first and second regions, and a method of preparing that magnetic component are disclosed. The first region includes a magnetic phase and the second region includes a non-magnetic phase. The method includes mechanically masking pre-selected sections of a surface portion of the component by using a nitrogen stop-off material and heat-treating the component in a nitrogen-rich atmosphere at a temperature greater than about 900° C. Both the first and second regions are substantially free of carbon, or contain only limited amounts of carbon; and the second region includes greater than about 0.1 weight % of nitrogen.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: General Electric Company
    Inventors: Laura Cerully Dial, Richard DiDomizio, Francis Johnson
  • Publication number: 20150111061
    Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping coating having high damping loss attributes when a strain amplitude is 500-2000 micro-strain, and/or maximum damping loss attributes that occurs when the strain amplitude is greater than 250 micro-strain, and a turbine component having a face-centered cubic ferromagnetic damping coating.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 23, 2015
    Inventor: Mo-How Herman Shen
  • Patent number: 9013274
    Abstract: An article, system and method related to a magnetomechanical marker used to mark stationary assets. Magnetomechanical markers can be arranged in clusters and associated with stationary assets, including assets buried underground. Markers can be associated with an asset by being attached to the asset, arranged in a particular spatial relationship with the asset, or in any other appropriate way. A portable locating device can be used to generate an alternating magnetic field to activate the magnetomechanical marker and thus locate the asset.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: April 21, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Ziyad H. Doany, Dean M. Dowdle, Michael E. Hamerly, William C. Egbert, Terrence H. Joyce, Jr.
  • Publication number: 20150098155
    Abstract: A magnetic sensor may generally be configured as a data reader capable of sensing data bits from an adjacent data storage medium. Various embodiments of a magnetic element may have at least a magnetic stack that contacts at least a first shield. The first shield can have at least one synthetic antiferromagnetic structure (SAFS) that is pinned by a high-coercivity ferromagnetic (HCFM) layer.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 9, 2015
    Applicant: Seagate Technology LLC
    Inventors: Adam Andrzej Lapicki, Kevin A. McNeill, Marcus W. Ormston, Sameh Sayed Ali Hassan, Yuqing Du
  • Publication number: 20150079305
    Abstract: A manufacturing method and a manufacturing apparatus for a printing magnetic orientation master and a magnetic pigment presswork are provided. The manufacturing method for a printing magnetic orientation master comprises: providing a magnet; using a heat radiation beam to heat a partial area of the magnet so that a new magnetic domain structure is formed in the partial area through self-magnetization of the magnet to change a magnetic-field distribution in the partial area; and removing the heat radiation beam to keep the new magnetic domain structure after it is decreased to a normal temperature so that the changed magnetic-field distribution is kept in the partial area, thus forming the printing magnetic orientation master having a predetermined magnetic orientation pattern. This can simplify the manufacturing process of the printing magnetic orientation master and allow the printing magnetic orientation master to carry abundant pattern information.
    Type: Application
    Filed: April 8, 2013
    Publication date: March 19, 2015
    Inventors: Xing Wang, Yumin Liao, Qian Huang, Yifeng Yang, Pu Wang
  • Publication number: 20150034211
    Abstract: Disclosed is a grain-oriented electrical steel sheet exhibiting low hysteresis loss and low coercive force, in which an increase in hysteresis loss due to laser irradiation or electron beam irradiation, which has been a conventional concern, is effectively inhibited. The grain-oriented electrical steel sheet has closure domain regions (X) formed to divide the magnetic domains in a rolling direction, from one end to the other in the width direction of the steel sheet, provided that Expression (1) is satisfied: ?(500t?80)×s+230?w??(500t?80)×s+330??Expression (1), where t represents a sheet thickness (mm); w represents a smaller one of the widths (?m) of the regions measured on the front and rear surfaces of the steel sheet, respectively, by using a Bitter method; and s represents an average number of the regions present within one crystal grain.
    Type: Application
    Filed: December 21, 2012
    Publication date: February 5, 2015
    Inventors: Shigehiro Takajo, Seiji Okabe
  • Publication number: 20140366991
    Abstract: A method of treating a rare earth-based magnet is provided that comprises the following. At least one precursor sintered R2Fe14B-type magnet having a body is provided. A paste is provided that comprising particles comprising a rare earth element R? and applied to at least one surface other than a surface of the body and a layer of the particles is formed on the at least one surface providing a source of the rare earth element R?. The precursor sintered R2Fe14B-type magnet is placed adjacent the layer and the rare earth element R? diffused into the precursor sintered R2Fe14B-type magnet from the source, whilst the precursor sintered R2Fe14B-type magnet is adjacent the layer and increasing the content of the R? rare earth element at least at the outer surface of the body. A rare earth-based magnet is produced.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 18, 2014
    Inventors: Christoph BROMBACHER, Katja VOELKER, Joerg DREIKORN
  • Publication number: 20140366990
    Abstract: A method for making an ordered magnetic alloy includes (a) providing a thermally conductive base having opposite first and second surfaces; (b) forming a thermal barrier layer on the first surface of the thermally conductive base; (c) forming a disordered magnetic alloy layer on the thermal barrier layer, the disordered magnetic alloy layer being made from a disordered alloy which contains a first metal selected from Fe, Co, and Ni, and a second metal selected from Pt and Pd; and (d) after step (c), applying a transient heat to the thermally conductive base to cause rapid thermal expansion of the thermally conductive base, which, in turn, causes generation of an in-plane tensile stress in the disordered magnetic alloy layer.
    Type: Application
    Filed: October 25, 2013
    Publication date: December 18, 2014
    Applicant: National Tsing Hua University
    Inventors: Chih-Huang LAI, Liang-Wei WANG, Yun-Chung WU, Wen-Chieh SHIH
  • Publication number: 20140299232
    Abstract: The present technology relates to a Ni—Mn—Ga magnetic shape memory (MSM) alloy including twin boundaries type 2, which are deviated approximately +/?2-4 degrees from (101) or equivalent crystallographic plane by rotation about [?101] or equivalent crystallographic direction. This technology relates also to an actuator, sensor and harvester including MSM element of this technology.
    Type: Application
    Filed: May 21, 2012
    Publication date: October 9, 2014
    Applicant: ADAPTIVE MATERIALS TECHNOLOGY - ADAPTAMAT OY
    Inventors: Yossef Ezer, Oleksii Sozinov, Ladislav Straka, Aleksandr Soroka, Nataliya Lanska
  • Publication number: 20140283953
    Abstract: Method for producing a soft magnetic alloy strip suited to be mechanically cut, having a chemical composition comprising, by weight: 18% ?? Co ? 55%? 0% ? V + W ? 3% 0% ? Cr ? 3% 0% ? Si ? 3% 0% ? Nb ? 0.5%? 0% ? B ? 0.05%?? 0% ? C ? 0.1%? 0% ? Zr + Ta ? 0.5%? 0% ? Ni ? 5% 0% ? Mn ? 2% the rest being iron and impurities from production, according to which a strip obtained by hot rolling a semi-finished product consisting of the alloy is cold-rolled to obtain a cold-rolled strip with a thickness less than 0.6 mm, After the cold rolling, the strip is running annealed by passing it through a continuous furnace at a temperature between the order/disorder transition temperature of the alloy and the ferritic/austenitic transformation point of the alloy, followed by rapid cooling to a temperature below 200° C.
    Type: Application
    Filed: December 16, 2011
    Publication date: September 25, 2014
    Applicant: APERAM
    Inventors: Thierry Waeckerle, Remy Batonnet
  • Publication number: 20140191833
    Abstract: A method for producing a nanocrystalline rare earth magnet having a grain and a grain boundary phase includes: quenching a melt of a rare earth magnet composition to form a quenched thin ribbon having a nanocrystalline structure; sintering the quenched thin ribbon to obtain a sintered body; heat treating the sintered body at a temperature which is higher than a lowest temperature in a first temperature range where the grain boundary phase diffuses or flows, and which is lower than a lowest temperature in a second temperature range where the grain becomes coarse; and quenching the heat treated sintered body to 200° C. or less at a cooling speed of 50° C./min or more.
    Type: Application
    Filed: August 22, 2012
    Publication date: July 10, 2014
    Inventors: Noritsugu Sakuma, Hidefumi Kishimoto
  • Publication number: 20140174607
    Abstract: Methods, systems, and apparatuses for retaining magnetic properties of magnetic elements while undergoing manufacturing processes are presented. In one embodiment, a manufacturing fixture includes a temperature controlled region suitable for retaining a magnetic element. The manufacturing fixture also includes a cooling mechanism configured to maintain the magnetic element at an acceptable temperature range during a thermally active manufacturing process. The temperature controlled or stabilized region can include a structure configured to receive the magnetic element and a sensor, or sensors. In one embodiment, the sensor can be configured to measure an ambient temperature of the temperature stabilized region. In another embodiment, the sensor can be a magnetic sensor configured to determine a magnetic property of the magnetic element.
    Type: Application
    Filed: July 31, 2013
    Publication date: June 26, 2014
    Applicant: Apple Inc.
    Inventors: Douglas Joseph Weber, Julio C. Quintero, Benjamin M. Rappoport, Harry W. Smith, IV
  • Publication number: 20140104024
    Abstract: An alloy of Fe100-a-b-c-d-x-y-zCuaNbbMcTdSixByZz and up to 1 atomic % impurities; M is one or more of Mo or Ta, T is one or more of V, Cr, Co or Ni and Z is one or more of C, P or Ge, wherein 0.0 atomic % a <1.5 atomic %, 0.0 atomic % b <3.0 atomic %, 0.2 atomic % c 4.0 atomic %, 0.0 atomic % d <5.0 atomic %, 12.0 atomic %<x<18.0 atomic %, 5.0 atomic %<y<12.0 atomic % and 0.0 atomic % z<2.0 atomic %, and wherein 2.0 atomic % (b+c) 4.0 atomic %, produced in the form of a strip and having a nanocrystalline structure in which at least 50% by volume of the grains have an average size of less than 100 nm, a remanence ratio Jr/Js<0.02, Jr being the remanent polarisation and Js being the saturation polarisation, and a coercitive field strength Hc which is less than 1% of the anisotropic field strength Ha and/or less than 10 A/m.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventors: Giselher HERZER, Mie Marsilius, Christian Polak
  • Patent number: 8689761
    Abstract: A forged exhaust poppet valve and a method of solution heat treating the same are provided. The forged exhaust poppet valve (10) includes a head portion (12) which has a seat portion (14) on the outer periphery thereof and is integral with a diametrically tapered neck portion (16) connected to a stem portion (18). Using a radio-frequency heating apparatus, a solution heat treatment is given to a predetermined transitional region (A) of the neck portion and the stem portion that is exposed to exhaust air during a valve opening period such that the grain size in the region (A) does not exceed ASTM 10, thereby securing a necessary high-temperature creep strength in the region (A) and a necessary hardness (wear resistance) in the seat portion (14) and thereby rendering the exhaust poppet valve highly durable.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: April 8, 2014
    Assignee: Nittan Valve Co., Ltd.
    Inventors: Yasuhito Tanaka, Hisanaga Yokoyama
  • Publication number: 20140034193
    Abstract: The present invention relates to a method for producing a grain-oriented flat steel product that is intended for the manufacture of parts for electrotechnical applications and has minimised magnetic loss values and optimised magneto-restrictive properties, including the operations providing a flat steel product, laser-treating the flat steel product, wherein, in the course of the laser treatment, linear deformations, which are arranged with a spacing L, are formed into the surface of the flat steel product by means of a laser beam emitted by a laser beam source with a power P. The method according to the invention for producing flat steel products is optimally suited for the manufacture of parts for transformers.
    Type: Application
    Filed: September 22, 2011
    Publication date: February 6, 2014
    Applicant: THYSSENKRUPP ELECTRICAL STEEL GMBH
    Inventors: Eyup Duman, Christof Holzapfel, Thorsten Krenke, Ludger Lahn, Régis Lemaitre, Chaoyong Wang, Thierry Belgrand
  • Patent number: 8641841
    Abstract: A continuous heat treatment furnace is provided in which an atmosphere-control gas is introduced to a heating chamber having a heating zone, metal tubes are continuously charged along an axial direction from a furnace entrance, and the metal tube subjected to a heat treatment is taken out from a furnace. The continuous heat treatment furnace includes a front chamber which has a preheating zone on an entrance side of the heating chamber and seal curtains which are located on an entrance side and an exit side of the front chamber.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: February 4, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Mikio Tatsuoka, Akhiro Sakamoto
  • Publication number: 20130315775
    Abstract: A rare earth magnet production method of the present invention includes a placing step of placing a magnet material including a compact or a sintered body of powder particles having a rare earth magnet alloy, and a diffusing material containing a diffusing element to improve coercivity, in a vicinity of each other; and a diffusing step of diffusing the diffusing element into an inside of the magnet material by exposing the magnet material heated to vapor of the diffusing element evaporated from the diffusing material heated; and wherein the diffusing step is a step of heating the diffusing material independently of the magnet material to diffusing material temperature which is different from heating temperature of the magnet material called magnet material temperature.
    Type: Application
    Filed: February 13, 2012
    Publication date: November 28, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Yuji Kaneko, Hisaaki Takao, Yukio Takada, Motoki Hiraoka, Keiu Kanada
  • Patent number: 8591669
    Abstract: The present disclosure is directed to a method of shaping a starting material of polycrystalline Fe—Ga alloy sheet of varying texture or crystal orientation. The method includes texturing the surface of the Fe—Ga alloy sheet to re-orient polycrystalline Fe—Ga crystals of the polycrystalline Fe—Ga alloy sheet to increase the uniformity of the crystal orientation of the Fe—Ga alloy sheet. The texturing step includes: initially deforming the Fe—Ga alloy sheet by hot rolling; subsequently deforming the previously hot rolled Fe—Ga alloy sheet by warm rolling; and annealing the previously warm rolled Fe—Ga alloy sheet. The method provides an alloy having a saturation magnetostriction potential greater than 60 ppm in applied fields of between 200-600 Oersted. During the annealing step H2S gas is added to introduce sulfur for promoting surface-energy-induced selective growth of {110} grain. The annealing step is performed in an atmosphere of argon gas.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: November 26, 2013
    Assignee: University of Maryland
    Inventors: Suok Min Na, Alison Behre Flatau
  • Patent number: 8572830
    Abstract: A method and apparatus for producing a magnetic attachment mechanism is described. A method is provided for determining the magnetic field axis of an element prior to machining it. The magnetic field axis can be used as a reference to machine an outer surface of the magnetic element at a desired angle. The method provides a means to more precisely align magnetic field axes of corresponding magnets in a magnetic attachment system.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: November 5, 2013
    Assignee: Apple Inc.
    Inventor: Cesare A. Tolentino
  • Publication number: 20130209835
    Abstract: A method involves depositing a seed layer comprising at least A1 phase FePt. A main layer of A1 phase FePt is deposited over the seed layer. The main layer includes FePt of a different stoichiometry than the seed layer. The seed and main layers are annealed to convert the A1 phase FePt to L10 phase FePt. The annealing involves heating the substrate prior to depositing at least part of the A1 phase FePt of the main or seed layers.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 15, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: SEAGATE TECHNOLOGY LLC
  • Patent number: 8491731
    Abstract: An alloy composition of FeaBbSicPxCyCuz. Parameters meet the following conditions: 79?a?86 atomic %; 5?b?13 atomic %; 0?c?8 atomic %; 1?x?8 atomic %; 0?y?5 atomic %, 0.4?z?1.4 atomic %; and 0.08?z/x?0.8. Or, parameters meet the following conditions: 81?a?86 atomic %; 6?b?10 atomic %; 2?c?8 atomic %; 2?x?5 atomic %; 0?y?4 atomic %; 0.4?z?1.4 atomic %, and 0.08?z/x?0.8.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: July 23, 2013
    Inventor: Akihiro Makino
  • Publication number: 20120327537
    Abstract: An apparatus includes a sensor stack, first and second shields positioned on opposite sides of the sensor stack, and a first shield stabilization structure adjacent to the first shield and applying a bias magnetic field to the first shield. A second shield stabilization structure can be positioned adjacent to the second shield.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 27, 2012
    Applicant: Seagate Technology LLC
    Inventors: Eric Walter Singleton, Junjie Quan, Jae-Young Yi
  • Patent number: 8337637
    Abstract: A method for ordering a disordered alloy includes: simultaneously ion bombarding and annealing a disordered alloy to transform the disordered alloy from a disordered crystalline state to an ordered crystalline state. A method for making a perpendicular magnetic recording medium which includes an ordered alloy layer is also disclosed.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: December 25, 2012
    Assignee: National Taiwan University
    Inventors: Fu-Te Yuan, An-Cheng Sun, Jen-Hwa Hsu, Ching-Ray Chang
  • Publication number: 20120312422
    Abstract: A molten alloy that has a nanocomposite magnet composition is quenched and solidified to fabricate a foil that has a polycrystalline phase composed of a hard magnetic phase with an average crystal grain diameter of 10 to 200 nm and a soft magnetic phase with an average crystal grain diameter of 1 to 100 nm. The foil that includes a low melting point phase that is formed on a surface of the foil and that has a melting point that is lower than that of the polycrystalline phase is sintered.
    Type: Application
    Filed: January 27, 2011
    Publication date: December 13, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masao Yano, Noritsugu Sakuma, Tetsuya Shoji
  • Patent number: 8313834
    Abstract: To provide a core for reactor capable of reducing the eddy current loss and improving the direct current superposition characteristics, a manufacturing method thereof, and a reactor. A core for reactor M is obtained by press molding metallic magnetic particles coated with an insulating coated film, and the metallic magnetic particles have the following compositions: (1) the mean particle size is 1 ?m or more and 70 ?m or less; (2) the variation coefficient Cv which is a ratio (?/?) of the standard deviation (?) of the particle size and the mean particle size (?) is 0.40 or less; and (3) the degree of circularity is 0.8 or more and 1.0 or less. On the outside of the insulating coated film, at least one of a heat-resistance imparting protective film and a flexible protective film is further provided as a outer coated film.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: November 20, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Atsushi Sato, Toru Maeda
  • Patent number: 8287665
    Abstract: A soft magnetic alloy contains P, B, and Cu as essential components. As a preferred example, an Fe-based alloy contains Fe of 70 atomic % or more, B of 5 atomic % to 25 atomic %, Cu of 1.5 atomic % or less (excluding zero), and P of 10 atomic or less (excluding zero).
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: October 16, 2012
    Assignees: NEC Tokin Corporation, Tohoku University
    Inventors: Akiri Urata, Hiroyuki Matsumoto, Akihiro Makino
  • Patent number: 8282745
    Abstract: An Fe-based soft magnetic alloy includes: Fe; and a component R, wherein the component R contains at least one of P, C, B, and Si, there is a temperature difference of equal to or greater than 20° C. between a precipitation temperature of an ?-Fe crystal phase and a precipitation temperature of an Fe compound, the Fe-based soft magnetic alloy is formed of a mixed-phase structure in which an amorphous phase and the ?-Fe crystal phase are mixed, and a diameter of a crystallite of the ?-Fe crystal phase is equal to or smaller than 50 nm, and a volume fraction of the ?-Fe crystal phase to the total is equal to or lower than 40%. In addition, the composition formula is represented by Fe100?x?uJxRu, a component J contains at least one of Cr, Co, Ni, and Nb, and 0 at %?x?6 at %, 17 at %?u?25 at %, and 17 at %?x+u?27.1 at % are satisfied.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: October 9, 2012
    Assignee: Alps Green Devices Co., Ltd.
    Inventors: Keiko Tsuchiya, Hisato Koshiba, Jun Okamoto, Takao Mizushima
  • Patent number: 8277575
    Abstract: The invention relates to inorganic intermetallic compounds having a PMR effect (combined GMR/CMR effect), which are characterized in that they contain at least two elements per formula unit and have a field sensitivity of less than 10% per 0.1 T at temperatures greater than 290 K. The invention also relates to composites consisting of these compounds, to a method for the production thereof and to their use, in particular, as magnetic field sensors or in the domain of spin electronics.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: October 2, 2012
    Assignee: International Business Machines Corporation
    Inventor: Claudia Felser
  • Patent number: 8268092
    Abstract: Provided are a magnetic sheet for use in a radio frequency identification (RFID) antenna, an RFID antenna including the magnetic sheet, and a method of manufacturing the magnetic sheet, in which the magnetic sheet includes an amorphous alloy selected from the group consisting of Fe—Si—B, Fe—Si—B—Cu—Nb, Fe—Zr—B and Co—Fe—Si—B. The magnetic sheet is made by laminating amorphous alloy ribbons made of an amorphous alloy between magnetic sheet layers formed of alloy powder including at least one amorphous alloy and then compression-molding the amorphous alloy ribbons, to thereby control microcrack of the amorphous alloy ribbons and enhance characteristic of an end-product. The magnetic sheet is also thin, and has an excellent magnetic permeability, and a simple manufacturing process.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: September 18, 2012
    Assignee: Amotech Co., Ltd.
    Inventors: Jae Suk Yang, Hyeon Chul Lim, Byoung Ki Lee, Yong Sup Lee, Yong Hyun Kim, Yong Sul Song, Sang Kyun Kwon, Beom Jin Kim
  • Patent number: 8182619
    Abstract: First, an R—Fe—B based rare-earth sintered magnet body including, as a main phase, crystal grains of an R2Fe14B type compound that includes a light rare-earth element RL, which is at least one of Nd and Pr, as a major rare-earth element R is provided. Next, an M layer, including a metallic element M that is at least one element selected from the group consisting of Al, Ga, In, Sn, Pb, Bi, Zn and Ag, is deposited on the surface of the sintered magnet body and then an RH layer, including a heavy rare-earth element RH that is at least one element selected from the group consisting of Dy, Ho and Tb, is deposited on the M layer. Thereafter, the sintered magnet body is heated, thereby diffusing the metallic element M and the heavy rare-earth element RH from the surface of the magnet body deeper inside the magnet.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: May 22, 2012
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hideyuki Morimoto, Tomoori Odaka, Masao Noumi
  • Patent number: 8125338
    Abstract: An acousto-magnetic (AM) anti-theft alarming unit is designed for specific use in a hard tag anti-theft clamp which uses a magnetic detacher. The alarming unit includes a resonator housing defining a cavity in which is placed at least one resonator and a bias piece covered by a housing cover affixed to the resonator housing. The resonators are placed into the housing cavity in a vertically layered configuration. The bias piece is placed along the side of the resonators, as opposed to being beneath the resonators, as is conventional in the art. The bias piece is preferably made of a sintered rare-earth permanent magnet and has a high coercivity. Accordingly, this alarming unit has a strong resistance to demagnetization and a resistance to being shielded by metal. The bias piece has a strong anti-destruction ability, a simple structure and is easy to manufacture.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: February 28, 2012
    Assignee: Ningbo Signatronic Technologies, Ltd.
    Inventor: Lin Li
  • Patent number: 8105446
    Abstract: Disclosed are 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, and alloy flakes for a rare earth sintered magnet obtained by the method. A rare earth sintered magnet employing the alloy flakes is also disclosed.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: January 31, 2012
    Assignee: Santoku Corporation
    Inventors: Kazumasa Shintani, Ryo Murakami, Kazuhiko Yamamoto
  • Patent number: 8092616
    Abstract: A rapidly solidified Fe—Ga alloy containing 15 to 23 atomic percent of Ga having a particular rapidly solidified texture is formed into slices which are laminated to each other in a die, or is formed into a powder or chops which are filled in the die. Subsequently, spark plasma sintering is performed so that bonds between the slices, grains of the powder, or the chops are formed at a high density to form a bulk alloy and the rapidly solidified texture is not lost, followed by annealing whenever necessary, so that a magnetostriction of 170 to 230 ppm at room temperature is obtained.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: January 10, 2012
    Assignee: Japan Science and Technology Agency
    Inventors: Yasubumi Furuya, Teiko Okazaki, Chihiro Saito, Masaki Yokoyama, Mamoru Oomori
  • Patent number: 8092615
    Abstract: The invention concerns powder compositions consisting of electrically insulated particles of a soft magnetic material of an iron or iron-based powder and 0.1-2% by weight of a lubricant selected from the group consisting of fatty acid amides having 14-22 C atoms. Optionally a thermoplastic binder such as polyphenylene sulphide may be included in the composition. The invention also concerns a method for the preparation of soft magnetic composite components.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: January 10, 2012
    Assignee: Höganäs AB
    Inventors: Lisa Kjellén, Åsa Ahlin, Lars Hultman, Ola Andersson
  • Patent number: 8048236
    Abstract: A Gd5Ge2Si2 refrigerant compound is doped or alloyed with an effective amount of silicide-forming metal element such that the magnetic hysteresis losses in the doped Gd5Ge2Si2 compound are substantially reduced in comparison to the hysteresis losses of the undoped Gd5Ge2Si2 compound. The hysteresis losses can be nearly eliminated by doping the Gd5Ge2Si2 compound with iron, cobalt, manganese, copper, or gallium. The effective refrigeration capacities of the doped Gd5Ge2Si2 compound are significantly higher than for the undoped Gd5Ge2Si2 compound.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: November 1, 2011
    Assignee: The United States of America as represented by the Secretary of Commerce, the National Institute of Standards and Technology
    Inventors: Robert D. Shull, Alexander J. Shapiro, Virgil Provenzano
  • Patent number: 8038808
    Abstract: A flat soft magnetic material to be used for a noise-suppressing magnetic sheet, wherein the 50% particle size D50 (?m), coercive force Hc (A/m) and bulk density BD (Mg/m3) of the flat soft magnetic material satisfy the following formula (1). D50/(HC×BD)?1.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: October 18, 2011
    Assignee: TDK Corporation
    Inventors: Atsuhito Matsukawa, Katsuhiko Wakayama, Hideharu Moru, Naoyoshi Sato, Yoshihito Hirai, Toshihisa Murayoshi