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| Number | Title | Issue Date |
| 8128758 | R-Fe-B microcrystalline high-density magnet and process for production thereof An R—Fe—B based rare-earth alloy powder with a mean particle size of less than about 20 μm is provided and compacted to make a powder compact. Next, the powder compact is subjected to a heat treatment at a temperature of about 550° C. to less than about 1,000Â... | 03/06/2012 |
| 8128760 | Permanent magnet and method of manufacturing same By eliminating the necessity of a prior step for cleaning a sintered magnet before adhering Dy and/or Tb to the surface of the sintered magnet S, the productivity of a permanent magnet having diffused Dy and/or Tb into grain boundary phase is improved. Iron-boron-ra... | 03/06/2012 |
| 8128759 | Permanent magnet and method of manufacturing same By causing at least one of Dy and Tb to be adhered to the surface of an iron-boron-rare earth based sintered magnet of a predetermined shape, and is then to be diffused into grain boundary phase, a permanent magnet can be manufactured at high workability and low cos... | 03/06/2012 |
| 8075707 | Method for preparing rare earth permanent magnet material A method for preparing a rare earth permanent magnet material comprises the steps of disposing a powder on a surface of a sintered magnet body of R1aTbAcMd composition wherein R1 is a rare earth eleme... | 12/13/2011 |
| 8038807 | R-Fe-B rare-earth sintered magnet and process for producing the same 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 i... | 10/18/2011 |
| 7985303 | Rare earth permanent magnet and its preparation A rare earth permanent magnet is prepared by disposing a powdered metal alloy containing at least 70 vol % of an intermetallic compound phase on a sintered body of R—Fe—B system, and heating the sintered body having the powder disposed on its surface below the s... | 07/26/2011 |
| 7972448 | Method for the production of an anisotropic magnetic powder and a bonded anisotropic magnet produced therefrom Disclosed herein is a method for the production of an anisotropic magnetic powder or a magnet produced from said powder, wherein a hydrogenating and dehydrogenating method is applied to the starting material in order to produce the powder. An anisotropic oriented ma... | 07/05/2011 |
| 7955443 | Method for preparing rare earth permanent magnet material A permanent magnet material is prepared by covering an anisotropic sintered magnet body of formula: R1x(Fe1-yCoy)100-x-z-aBzMa wherein R1 is a rare earth element, M is Al, Cu or ... | 06/07/2011 |
| 7922832 | Method for preparing permanent magnet material A permanent magnet material is prepared by machining an anisotropic sintered magnet body having the compositional formula: Rx(Fe1-yCoy)100-x-z-aBzMa wherein R is Sc, Y or a rare earth element, M is Al... | 04/12/2011 |
| 7883587 | Method for preparing rare earth permanent magnet A rare earth permanent magnet is prepared by providing a sintered magnet body consisting of 12-17 at % of rare earth, 3-15 at % of B, 0.01-11 at % of metal element, 0.1-4 at % of O, 0.05-3 at % of C, 0.01-1 at % of N, and the balance of Fe, disposing on a surface of... | 02/08/2011 |
| 7824506 | Nd-Fe-B magnet with modified grain boundary and process for producing the same In known methods, an improvement of the coercive force is realized by allowing the Dy metal or the like to present selectively in crystal grain boundary portions of a sintered magnet. However, since these are based on a physical film formation method, e.g., sputteri... | 11/02/2010 |
| 7819988 | Method of producing cobalt-platinum magnetic alloys with improved magnetic properties A method for processing CoPt alloys with improved magnetic properties. The method includes sealing a sample of a CoPt alloy in an evacuated quartz tube, and heating the alloy to a temperature of approximately 1000 degrees C. to homogenize the alloy for approximately... | 10/26/2010 |
| 7736444 | Method and system for manufacturing electrical silicon steel Grain oriented electrical steel is made in a manner that the grains are selectively grown to obtain a crystal structure known as cube-on-edge and the grains are largely aligned in the rolling direction. Selection of chemistry and process route along with thin slab c... | 06/15/2010 |
| 7438768 | Rare earth element sintered magnet and method for producing rare earth element sintered magnet Hydrogen embrittlement is prevented in Sm2Co17-based magnets and R2Fe14B-based magnets by metal plating the magnet, then carrying out heat treatment, or by forming a metal oxide or metal nitride layer on the metal plating ... | 10/21/2008 |
| 7435304 | Coating composition, and method for manufacturing high silicon electrical steel sheet using thereof There are provided a coating composition for siliconizing, and a method for manufacturing a high silicon electrical steel sheet using the same. The coating composition includes: a Fe—Si-based composite compound sintered powder having a grain size of −325 mesh an... | 10/14/2008 |
| 7399368 | Motor using magnet A permanent magnet comprises a hard magnetic material that contains at least a rare earth element and an anti-ferromagnetic material, wherein the hard magnetic material and the anti-ferromagnetic material are magnetically coupled. A volume ratio of the anti-ferromag... | 07/15/2008 |
| 7364628 | Solid material for magnet A solid material for a magnet, comprising a rare-earth/iron/nitrogen/hydrogen system magnetic material. ... | 04/29/2008 |
| 7361235 | Method for producing dispersed oxide reinforced ferritic steel having coarse grain structure and being excellent in high temperature creep strength A method of manufacturing an oxide dispersion strengthened ferritic steel excellent in high-temperature creep strength having a coarse grain structure. The method comprises mixing alloy powders and an Y2O3 powder, subjecting the mixed powder to... | 04/22/2008 |
| 7270718 | Method for manufacturing a soft magnetic powder material The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing ... | 09/18/2007 |
| 7264683 | Centrifugal casting method, centrifugal casting apparatus, and cast alloy produced by same The present invention relates to a casting method which employs rapid solidification of metal, rare-earth metal or the like, as well as to a casting apparatus and a cast alloy. A centrifugal casting method includes the steps of pouring a molten material onto a rotar... | 09/04/2007 |
| 7244287 | Magnetic particle, its production method, magnetic recording medium and its production method The present invention relates to a method of producing a magnetic particle including forming a layer containing an alloy particle that can form a CuAu-type or Cu3Au-type hard magnetic ordered alloy phase on a support, oxidizing the layer, and annealing th... | 07/17/2007 |
| 7208056 | Rare earth sintered magnet, and method for improving mechanical strength and corrosion resistance thereof An R-T-B system rare earth sintered magnet having a high mechanical strength and excellent corrosion resistance is provided. The R-T-B system rare earth sintered magnet of the present invention comprises a sintered body comprising a main phase consisting of an R | 04/24/2007 |
| 7179337 | Method for producing a soft magnetic material The invention provides a method for preparing a soft magnetic material which meets demands for low iron loss, high density, high strength and high productivity. The method comprises a surface oxidation step of forming oxide films on the surfaces of a soft magnetic p... | 02/20/2007 |
| 7172659 | Method for producing quenched R-T-B—C alloy magnet The present invention is a production method of an R-T-B—C rare earth alloy (R is at least one element selected from the group consisting of rare earth elements and yttrium, T is a transition metal including iron as a main component, B is boron, and C is carbon). ... | 02/06/2007 |
| 7166172 | Method of making ferromagnetic iron alloy powder for magnetic recording medium A ferromagnetic iron alloy powder for a magnetic recording medium is composed of acicular iron-base particles of an average major axis length (X) of not less than 20 nm and not greater than 80 nm and have oxygen content of not less than 15 wt % and coercive force (H... | 01/23/2007 |
| 7161763 | GMR sensor with oriented hard bias stabilization Magnetic data storage devices use read/write heads to transfer data between the magnetic storage medium and the rest of the system. The read head is constructed with a magnetic layer called a free layer whose magnetic axis rotates based upon external magnetic influe... | 01/09/2007 |
| 7141126 | Rare earth magnet and method for manufacturing the same Rare earth alloy powder having an oxygen content of 50 to 4000 wt. ppm and a nitrogen content of 150 to 1500 wt. ppm is compacted by dry pressing to produce a compact. The compact is impregnated with an oil agent and then sintered. The sintering process includes a f... | 11/28/2006 |
| 7138019 | Method for producing magnetostrictive element and sintering method In the step of sintering a compact that is finally to be a magnetostrictive element, when the temperature in a furnace is elevated, the atmosphere in the furnace is evacuated by a vacuum pump to keep the pressure in the furnace at negative pressure in a temperature ... | 11/21/2006 |
| 7138018 | Process for producing anisotropic magnet powder A method for manufacturing an anisotropic magnet powder includes a high-temperature hydrogenation process of holding an RFeB-based alloy containing rare earth elements (R), B and Fe as main ingredients in a treating atmosphere under a first treating pressure (P1 | 11/21/2006 |
| 7138017 | Rare earth magnet and method for producing the magnet A method of making an alloy powder for an R—Fe—B-type rare earth magnet includes the steps of preparing a material alloy that is to be used for forming the R—Fe—B-type rare earth magnet and that has a chilled structure that constitutes about 2 volume percent... | 11/21/2006 |
| 7132018 | Magnetic core insulation Disclosed herein is an insulating material between adjacent metal layers of a soft magnetic core, and a process for forming this insulating material. The insulating material is composed of the native metal oxides of the metallic core material. ... | 11/07/2006 |
| 7087185 | Magnetic powder and isotropic bonded magnet Disclosed herein is a magnetic powder which can provide a magnet having a high magnetic flux density and excellent magnetizability and reliability especially excellent heat resisting property (heat stability). The magnetic powder is composed of an alloy composition ... | 08/08/2006 |
| 7077919 | Magnetic core insulation Disclosed herein is an insulating material between adjacent metal layers of a soft magnetic core, and a process for forming this insulating material. The insulating material is composed of the native metal oxides of the metallic core material. ... | 07/18/2006 |
| 7067199 | Magnetic particle of CuAu(1) or CuAu(III) type its production method, magnetic recording medium and its production method The present invention relates to a method of producing a magnetic particle including forming a layer containing an alloy particle that can form a CuAu-type or Cu3Au-type hard magnetic ordered alloy phase on a support, oxidizing the layer, and annealing th... | 06/27/2006 |
| 7056393 | Method of making sintered compact for rare earth magnet A method of making a sintered body for a rare earth magnet includes the steps of (a) preparing a first coarse powder by coarsely pulverizing a rare earth alloy sintered body by a hydrogen pulverization process, (b) preparing a first fine powder by finely pulverizing... | 06/06/2006 |
| 7036739 | Data storage device apparatus and method for using same A data storage device for use as a portable card, magnetically encodeable card, magnetic credit card or the like is shown. The data storage device includes a substrate having at least one surface. A high density, magnetically coercive material layer is disposed on o... | 05/02/2006 |
| 7025837 | Permanent magnets and R-TM-B based permanent magnets Permanent magnets in which the ferromagnetic phase is matched with the grain boundary phase, and permanent magnets in which magnetocrystalline anisotropy in the vicinity of the outermost shell of the major phase is equivalent in intensity to that in the inside to su... | 04/11/2006 |
| 7022252 | Permanent magnetic alloy and bonded magnet The permanent magnetic alloy of the present invention comprises an R—Fe—B alloy wherein R is at least one element selected from rare earth elements including Y. The R—Fe—B alloy has a composition mainly comprising Fe, substantially containing no N, and conta... | 04/04/2006 |
| 7018485 | Apparatus for subjecting rare earth alloy to hydrogenation process and method for producing rare earth sintered magnet using the apparatus An apparatus for subjecting a rare earth alloy block to a hydrogenation process includes a casing, gas inlet and outlet ports, a member arranged to produce a gaseous flow, and a windbreak plate. The casing defines an inner space for receiving a container. The contai... | 03/28/2006 |
| 7019517 | Offset magnet rotary position sensor A rotary position sensing system and method are disclosed, including a shaft comprising an offset mounting hole, and a magnet having a magnetic field that is magnetized across an axis of the magnet, wherein the magnet is mounted to the shaft at the offset mounting h... | 03/28/2006 |
