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| Number | Title | Issue Date |
| 8414709 | NdFeB sintered magnet and method for producing the same The present invention is aimed at providing a method for producing an NdFeB sintered magnet having a higher coercivity and higher squareness of the magnetization curve than ever before. A method for producing an NdFeB sintered magnet according to the present inventi... | 04/09/2013 |
| 8361242 | Powders for rare earth magnets, rare earth magnets and methods for manufacturing the same A powder consists essentially by weight, of 28.00≦R≦32.00%, where R is at least one rare earth element including Y and the sum of Dy+Tb>0.5, 0.50≦B≦2.00%, 0.50≦Co≦3.50%, 0.050≦M≦0.5%, where M is one or more of the elements Ga, Cu and Al, 0.25 wt % | 01/29/2013 |
| 8287661 | Method for producing R-T-B sintered magnet A method for producing a sintered R-T-B based magnet includes the steps of: providing R-T-B based alloy powders A and B so that the R-T-B based alloy powder B has a particle size D50 that is smaller by at least 1.0 μm than that of the R-T-B based alloy powder A and... | 10/16/2012 |
| 8252123 | 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... | 08/28/2012 |
| 8157926 | Permanent magnet and method of manufacturing same There is provided a method of manufacturing a permanent magnet in which Dy and/or Tb adhered to the surface of a sintered magnet containing a lubricant can be efficiently diffused and in which the permanent magnet having high magnetic properties can be manufactured ... | 04/17/2012 |
| 8157927 | Raw material alloy for R-T-B system sintered magnet, R-T-B system sintered magnet and production method thereof It is an object of the present invention to obtain a highly coercive R-T-B system sintered magnet by making the crystal microstructure of a raw material alloy prepared by strip casting more uniform, thereby making the crushed powder obtained from such raw material a... | 04/17/2012 |
| 8105443 | Non-ageing permanent magnet from an alloy powder and method for the production thereof A method for the production of pressed permanent magnets comprises the following steps: A mixture of at least one magnetic powder and a thermosetting binder is provided and pressed to produce a moulded body. In order to obtain a permanent and particularly reliable p... | 01/31/2012 |
| 8105444 | Process for producing highly anticorrosive rare earth permanent magnet and method of using the same A process for producing a highly anticorrosive rare earth permanent magnet, characterized by sequentially subjecting an R—Fe—B sintered magnet to surface finishing involving cutting and/or polishing, plating pretreatment, nickel electroplating to a given plating... | 01/31/2012 |
| 8025744 | 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... | 09/27/2011 |
| 7967919 | Process for producing self-assembled rare earth-iron bonded magnet and motor utilizing the same The present invention provides a method for manufacturing a self-organized rare earth-iron bonded magnet, including: a first step of covering a rare earth-iron magnet powder with oligomer or prepolymer in which one molecule includes at least two or more reactive gro... | 06/28/2011 |
| 7938915 | Rare earth alloy binderless magnet and method for manufacture thereof A method for producing a rare-earth alloy based binderless magnet according to the present invention includes the steps of: (A) providing a rapidly solidified rare-earth alloy magnetic powder; and (B) compressing and compacting the rapidly solidified rare-earth allo... | 05/10/2011 |
| 7594972 | Alloy lump for R-T-B type sintered magnet, producing method thereof, and magnet The present invention is an alloy lump for R-T-B type sintered magnets, including an R2T14B columnar crystal and an R-rich phase (in which R is at least one rare earth element including Y, T is Fe or Fe with at least one transition metal elemen... | 09/29/2009 |
| 7585378 | Methods for producing raw material alloy for rare earth magnet, powder and sintered magnet A method of making a material alloy for an R-T-Q based rare-earth magnet according to the present invention includes the steps of: preparing a melt of an R-T-Q based rare-earth alloy, where R is rare-earth elements, T is a transition metal element, Q is at least one... | 09/08/2009 |
| 7578892 | Magnetic alloy material and method of making the magnetic alloy material A magnetic alloy material according to the present invention has a composition represented by Fe100-a-b-cREaAbCoc, where RE is a rare-earth element always including La, A is either Si or Al, 6 at %≦a≦11 at %, 8 at %≦... | 08/25/2009 |
| 7563330 | Magnetic material and manufacturing method thereof A powder raw material is prepared by mixing at least two kinds of powders selected from a powder A, a powder B, a powder C, and a powder D. A sintered body of a magnetic material having an NaZn13 crystal structure phase is formed by heating the powder raw... | 07/21/2009 |
| 7550047 | Rare earth element-iron-boron alloy and magnetically anisotropic permanent magnet powder and method for production thereof A method of making a magnetically anisotropic magnet powder according to the present invention includes the steps of preparing a master alloy by cooling a rare-earth-iron-boron based molten alloy and subjecting the master alloy to an HDDR process. The step of prepar... | 06/23/2009 |
| 7442262 | Alloy flake for rare earth magnet, production method thereof, alloy powder for rare earth sintered magnet, rare earth sintered magnet, alloy powder for bonded magnet and bonded magnet Disclosed is a rare earth magnet in the R-T-B (rare earth element-transition metal-boron) system that is made from an improved composition and properties of main phase alloy in the R-T-B system containing Pr and a boundary alloy. Disclosed also is a manufacturing me... | 10/28/2008 |
| 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 |
| RE40524 | Magnet powder-resin compound particles, method for producing such compound particles and resin-bonded rare earth magnets formed therefrom The magnet powder-resin compound particles substantially composed of rare earth magnet powder and a binder resin are in such a round shape that a ratio of the longitudinal size a to the transverse size b (a/b) is more than 1.00 and 3 or less, and that an average par... | 09/30/2008 |
| 7396419 | Method for preparing sintered product, sintered product and magnetostriction material A method for manufacturing a sintered compact includes the steps of preparing an alloy powder having a composition represented by Expression 1: RTW (where, R is at least one kind of rare earth metal, T is at least one kind of transition metal, and w defin... | 07/08/2008 |
| 7390369 | Method for producing rare earth based alloy powder and method for producing rare earth based sintered magnet An inventive method of making a rare-earth alloy powder is used to produce a rare-earth sintered magnet, whose main phase has a composition R2T14A (where R is one of the rare-earth elements including Y; T is Fe with or without a non-Fe transiti... | 06/24/2008 |
| 7377985 | Temper process of sintered Nd-Fe-B permanent magnet The present invention provides a tempering process for sintered Nd—Fe—B permanent magnet material, which optimizes the microstructure of the Nd—Fe—B magnet and improves intrinsic coercive force and its consistency by increasing the cooling rate after temperi... | 05/27/2008 |
| 7371292 | Nd-Fe-B type anisotropic exchange spring magnet and method of producing the same A Nd—Fe—B type anisotropic exchange spring magnet is produced by a method of obtaining powder of a Nd—Fe—B type rare earth magnet alloy which comprises hard magnetic phases and soft magnetic phases wherein a minimum width of the soft magnetic phases is small... | 05/13/2008 |
| 7371290 | Production method for permanent magnet and press device To avoid various problems caused by remnant magnetization and produce an anisotropic bonded magnet at a reduced cost, a method for producing an anisotropic bonded magnet by feeding a magnetic powder (such as an HDDR powder) into the cavity of a press machine and com... | 05/13/2008 |
| 7364628 | Solid material for magnet A solid material for a magnet, comprising a rare-earth/iron/nitrogen/hydrogen system magnetic material. ... | 04/29/2008 |
| 7344606 | Permanent magnet manufacturing method and press apparatus An anisotropic bonded magnet is produced at a low cost by avoiding various problems caused by remanence. Also, the unit weight and density of a compact is increased by filling even a cavity, having no easily feedable shape, with a magnet powder just as intended. An ... | 03/18/2008 |
| 7344605 | Exchange spring magnet powder and a method of producing the same An anisotropic exchange spring magnet powder complexing a hard magnetic material and a soft magnetic material, wherein a rare earth metal element, a transition metal element, boron and carbon and the like are contained, and the hard magnetic material and soft magnet... | 03/18/2008 |
| 7339817 | Thermally-assisted switching of magnetic memory elements A magnetic memory element is written to by heating the memory element and applying at least one magnetic field to the memory element. ... | 03/04/2008 |
| 7338566 | Alloy for sm-co based magnet, method for production thereof, sintered magnet and bonded magnet The present invention relates to a Sm—Co based magnet alloy useful as a raw material for producing magnets having high magnetic properties, such as sintered or bonded magnets, methods for producing such an alloy, and sintered or bonded magnets having excellent cor... | 03/04/2008 |
| 7338573 | Magnetic substrates with high magnetic loading A method of forming a magnetic assembly having at least one magnetic layer having dimensions of thickness, width and length, and at least one printable substrate layer having dimensions of thickness, width and length, including the steps of providing a molten magnet... | 03/04/2008 |
| 7325434 | Method for manufacturing ring-shaped magnet material and manufacturing apparatus used therefor A method for manufacturing a ring-shaped magnet includes arranging, in a penetrating hole formed in a die, a mandrel having a cylinder tip portion of a diameter d1, a cylinder base end portion of a diameter d2, provided d1 | 02/05/2008 |
| 7316752 | R-T-B-C based rare-earth magnetic powder and bonded magnet The step of preparing a rapidly solidified alloy by rapidly quenching a melt of an R-T-B-C based rare-earth alloy (where R is at least one of the rare-earth elements including Y, T is a transition metal including iron as its main ingredient, B is boron, and C is car... | 01/08/2008 |
| 7314530 | Press and magnet manufacturing method A press machine 10 includes a die 12 with a through hole 12a that defines a cavity, a first press surface 14a and a second press surface 16a for pressing a magnetic powder 18 loaded in the cavity, and ma... | 01/01/2008 |
| 7297213 | Permanent magnet including multiple ferromagnetic phases and method for producing the magnet An iron-based rare earth alloy magnet has a composition represented by the general formula: (Fe1-mTm)100-x-y-zQxRyMz, where T is at least one element selected from the group consisting of Co and Ni; Q... | 11/20/2007 |
| 7279053 | Alloy thin ribbon for rare earth magnet, production method of the same, and alloy for rare earth magnet The present invention provides a rare earth magnet superior in magnetic properties and thermal stability. In an aspect of the present invention, a production method of an alloy thin ribbon for a rare earth magnet includes a step to obtain a quenched thin ribbon by f... | 10/09/2007 |
| 7273405 | Sintered rare earth magnetic alloy wafer and wafer surface growing machine A method of producing a sintered rare earth magnetic alloy wafer comprises a step of using a cutter to slice a wafer of a thickness of not greater than 3 mm from a sintered rare earth magnetic alloy having ferromagnetic crystal grains surrounded by a more readily gr... | 09/25/2007 |
| 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 |
| 7261781 | Nanocomposite magnet A nanocomposite magnet has a composition represented by (Fe1-mTm)100-x-y-z-nQxRyTizMn, where T is at least one of Co and Ni, Q is at least one of B and C, R is at least one rare earth eleme... | 08/28/2007 |
| 7258751 | Rare earth magnet and method for production thereof In a rare earth magnet, an added heavy rare earth element RH such as Dy is effectively used without any waste, so as to effectively improve the coercive force. First, a molten alloy of a material alloy for an R-T-Q rare earth magnet (R is a rare earth ele... | 08/21/2007 |
| 7255752 | Method for manufacturing R-T-B system rare earth permanent magnet A method for manufacturing an R-T-B system rare earth permanent magnet that is a sintered body comprising a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements i... | 08/14/2007 |
