公开(公告)号：US20140062632A1

公开(公告)日：2014-03-06

申请号：US14114657

申请日：2012-12-27

申请人： INTERMETALLICS CO., LTD.

发明人： Masato Sagawa ,  Tetsuhiko Mizoguchi

IPC分类号： H01F1/057

CPC分类号： H01F1/0577 ,  C22C33/02 ,  C22C38/005 ,  C22C2202/02 ,  H01F41/0293

摘要： A NdFeB system sintered magnet produced by the grain boundary diffusion method that has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. The NdFeB system sintered magnet has a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called RH) attached to and diffused from a surface of the base material through the grain boundary inside the base material by a grain boundary diffusion treatment, wherein the difference Cs-Cd3 between the RH content Cs (wt %) in the grain boundary reaching the surface to which RH is attached and the RH content Cd3 (wt %) in the grain boundary at a depth of 3 mm from the aforementioned attachment surface is equal to or smaller than 20 wt %.

摘要翻译： 通过晶界扩散法制造的具有高矫顽力和矩形比的NdFeB系烧结磁体，其最大能量乘积仅有小的减小。 NdFeB系烧结磁体具有通过使NdFeB系合金的粉末取向并烧结粉末而制成的基材，Dy和/或Tb（“Dy和/或Tb”以下称为RH）附着并从表面扩散 通过晶界扩散处理通过基材内部的晶界而使基体材料中的RH含量Cs（wt％）之间的差异Cs-Cd3与到达RH的表面的RH含量Cs（wt％）和RH含量 与上述附着面相距3mm的晶界的Cd3（wt％）为20重量％以下。

公开(公告)号：US20140027083A1

公开(公告)日：2014-01-30

申请号：US14042935

申请日：2013-10-01

申请人： ULVAC, INC.

发明人： Hiroshi Nagata ,  Yoshinori Shingaki ,  Youichi Hirose ,  Kyoutoshi Miyagi

IPC分类号： B22D23/04

CPC分类号： B22D23/04 ,  C21D1/72 ,  C21D6/00 ,  C23C2/04 ,  H01F41/0293 ,  Y10T428/12361

摘要： There is provided an evaporating material of thin plate shape which can be manufactured at a reduced cost and at high productivity, the evaporating material being adapted for use in enhancing the coercive force of neodymium-iron-boron sintered magnet by heat treatment while evaporating Dy in vacuum or in reduced-pressure inert gas atmosphere. The evaporating material of this invention has a core member 1a made of a fire-resistant metal having a multiplicity of through holes, and is made by melting a rare-earth metal or an alloy thereof so as to get adhered to, and solidified on, the core member. In this case, the above-mentioned adhesion is performed by dipping the core member into a molten bath of the rare-earth metal or an alloy thereof, and pulling it out of the molten bath.

摘要翻译： 提供了一种薄板状的蒸发材料，其可以以低成本和高生产率制造，该蒸发材料适用于通过热处理提高钕铁硼烧结磁体的矫顽力，同时将Dy 真空或在减压惰性气体气氛中。 本发明的蒸发材料具有由具有多个通孔的耐火金属制成的芯体1a，并且通过使稀土金属或其合金熔化以使其粘附并固化， 核心成员。 在这种情况下，通过将芯构件浸入稀土金属或其合金的熔池中并将其从熔浴中拉出来进行上述粘合。

公开(公告)号：US20130293328A1

公开(公告)日：2013-11-07

申请号：US13980133

申请日：2012-01-19

申请人： Futoshi Kuniyoshi

发明人： Futoshi Kuniyoshi

IPC分类号： H01F1/053

CPC分类号： H01F1/0536 ,  B22F3/24 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0293

摘要： This sintered R-T-B based rare-earth magnet includes: R2Fe14B type compound crystal grains, including a light rare-earth element RL (which includes at least one of Nd and Pr) as a major rare-earth element R, as main phases; and a heavy rare-earth element RH (which includes at least one of Dy and Tb). Before its surface region is removed, the sintered R-T-B based rare-earth magnet has no layer including the rare-earth element R at a high concentration in that surface region. The sintered R-T-B based rare-earth magnet has a portion in which coercivity decreases gradually from its surface region toward its core portion. The difference in the amount of TRE between a portion of the sintered R-T-B based rare-earth magnet that reaches a depth of 500 μm as measured from its surface region toward its core portion and the core portion of the sintered R-T-B based rare-earth magnet is 0.1 through 1.0.

摘要翻译： 这种烧结的R-T-B系稀土类磁铁包括：作为主要的稀土元素R的稀土类元素RL（包括Nd和Pr中的至少一种）的R2Fe14B型复合晶粒， 和重稀土元素RH（其包括Dy和Tb中的至少一种）。 在除去表面区域之前，烧结的R-T-B系稀土类磁铁在该表面区域中没有含有高浓度的稀土类元素R的层。 烧结的R-T-B类稀土类磁体具有矫顽力从其表面区域向其芯部逐渐减小的部分。 从其表面区域向其芯部测量达到深度为500μm的烧结RTB型稀土类磁体的一部分与RTB型稀土类烧结体的核心部分之间的TRE量的差异为 0.1至1.0。

公开(公告)号：US20130278104A1

公开(公告)日：2013-10-24

申请号：US13924746

申请日：2013-06-24

申请人： Hitachi, Ltd.

发明人： Matahiro KOMURO ,  Yuichi SATSU ,  Hiroyuki SUZUKI

IPC分类号： H01F1/40 ,  H02K1/27

CPC分类号： H01F1/408 ,  C22C1/0441 ,  C22C2202/02 ,  H01F1/0556 ,  H01F1/0557 ,  H01F1/0577 ,  H01F1/058 ,  H01F1/0596 ,  H01F1/08 ,  H01F1/086 ,  H01F41/0293 ,  H02K1/02 ,  H02K1/27

摘要： The present invention makes it possible to increase the residual magnetic flux density and the coercive force of a rare earth magnet; and raise the Curie temperature. In a magnet formed by compressing magnetic particles, the surface of a magnetic particle is covered with a metal fluoride film, the magnetic particle has a crystal structure containing a homo portion formed by bonding adjacent iron atoms and a hetero portion formed by bonding two iron atoms via an atom other than iron, and the distance between the two iron atoms in the hetero portion is different from the distance between the adjacent iron atoms in the homo portion.

摘要翻译： 本发明可以增加稀土磁体的剩余磁通密度和矫顽力; 并提高居里温度。 在通过压缩磁性颗粒形成的磁体中，磁性颗粒的表面被金属氟化物膜覆盖，磁性颗粒具有包含通过键合相邻铁原子而形成的均匀部分的晶体结构和通过键合两个铁原子形成的杂质部分 通过除铁以外的原子，并且异质部分中的两个铁原子之间的距离不同于同质部分中相邻的铁原子之间的距离。

公开(公告)号：US20130266473A1

公开(公告)日：2013-10-10

申请号：US13440482

申请日：2012-04-05

申请人： Yucong Wang

发明人： Yucong Wang

IPC分类号： B22F1/00 ,  B22F3/12

CPC分类号： C22C33/02 ,  B22F2999/00 ,  C22C2202/02 ,  H01F1/0573 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0293 ,  B22F3/10 ,  B22F3/105 ,  B22F2003/1054

摘要： A method of making a permanent magnet includes a step of providing an alloy powder comprising at least one rare earth element. The alloy powder is shaped and then exposed to microwave radiation or a pulsed electric current to form a sintered magnet.

摘要翻译： 制造永磁体的方法包括提供包含至少一种稀土元素的合金粉末的步骤。 将合金粉末成形，然后暴露于微波辐射或脉冲电流以形成烧结磁体。

公开(公告)号：US08491728B2

公开(公告)日：2013-07-23

申请号：US13499492

申请日：2011-03-28

申请人： Izumi Ozeki ,  Katsuya Kume ,  Keisuke Hirano ,  Tomohiro Omure ,  Keisuke Taihaku ,  Takashi Ozaki

发明人： Izumi Ozeki ,  Katsuya Kume ,  Keisuke Hirano ,  Tomohiro Omure ,  Keisuke Taihaku ,  Takashi Ozaki

IPC分类号： H01F1/057

CPC分类号： C22C38/005 ,  B22F3/14 ,  B22F2998/10 ,  B22F2999/00 ,  C22C33/0278 ,  C22C38/002 ,  H01F1/0572 ,  H01F1/0577 ,  H01F1/086 ,  H01F41/0266 ,  H01F41/0293 ,  B22F9/04 ,  B22F1/0059 ,  B22F3/02 ,  B22F3/1017 ,  B22F2201/013 ,  B22F2201/20 ,  B22F3/087

摘要： There are provided a permanent magnet and a manufacturing method thereof that enables concentration of V, Mo, Zr, Ta, Ti, W or Nb contained in an organometallic compound in grain boundaries of the permanent magnet. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)x (M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body obtained by compacting the magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius so as to perform a calcination process in hydrogen. Thereafter, through sintering, a permanent magnet is manufactured.

摘要翻译： 提供一种使永磁体的晶界中的有机金属化合物中含有的V，Mo，Zr，Ta，Ti，W或Nb的浓度的永磁体及其制造方法。 向研磨的钕磁体的细粉末中加入含有结构式为M-（OR）x（M表示V，Mo，Zr，Ta，Ti，W或Nb的有机金属化合物）的有机金属化合物溶液，R表示取代基 由直链或支链烃构成的基团，x表示任意的整数），以使有机金属化合物均匀地附着于钕磁体粉末的粒子表面。 此后，将通过压实磁体粉末获得的紧凑体在200-900摄氏度的氢气氛中保持数小时，以便在氢气中进行煅烧过程。 此后，通过烧结制造永久磁铁。

公开(公告)号：US20130171342A1

公开(公告)日：2013-07-04

申请号：US13823153

申请日：2011-09-29

申请人： Futoshi Kuniyoshi

发明人： Futoshi Kuniyoshi

IPC分类号： H01F41/00

CPC分类号： H01F41/005 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C38/32 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0293

摘要： [Problem] To provide a heavy rare-earth element RH diffusion process that contributes greatly to mass production.[Solution] A method for producing a sintered magnet includes the steps of: providing a sintered R-T-B based magnet body; providing an RH diffusion source which is made of at least one of a fluoride, an oxide and an oxyfluoride that each include Dy and/or Tb; loading the sintered R-T-B based magnet body and the RH diffusion source into a process chamber so that the magnet body and the diffusion source are movable relative to each other and are readily brought close to, or into contact with, each other; and performing an RH diffusion process in which the sintered R-T-B based magnet body and the RH diffusion source are heated to a processing temperature of 800° C. through 950° C. while being moved either continuously or discontinuously in the process chamber.

摘要翻译： [问题]提供重质量的稀土元素RH扩散工艺，其大大有利于批量生产。 [解决方案]烧结磁体的制造方法包括以下工序：提供烧结的R-T-B系磁体; 提供由包含Dy和/或Tb的氟化物，氧化物和氟氧化物中的至少一种制成的RH扩散源; 将烧结的R-T-B基磁体和RH扩散源装载到处理室中，使得磁体和扩散源相对于彼此可移动并且容易彼此接近或接触; 并且在处理室中连续地或不连续地移动时，将烧结的R-T-B系磁体和RH扩散源加热到800℃〜950℃的RH扩散处理。

公开(公告)号：US20130153088A1

公开(公告)日：2013-06-20

申请号：US13714665

申请日：2012-12-14

申请人： Vacuumschmelze GmbH & Co. KG

发明人： Jörg DREIKORN ,  Kaan ÜSTÜNER ,  Heinz-Dieter ZILG

IPC分类号： H01F41/00

CPC分类号： H01F41/005 ,  H01F41/0293

摘要： A method for producing a rare earth-based magnet is provided that comprises providing a precursor sintered R2Fe14B-type magnet where R represents a rare earth element, applying particles comprising a rare earth element R′ to a first surface of the precursor sintered magnet, applying particles of further material to the first surface of the precursor magnet and/or a further surface of the precursor magnet and heat treating the precursor sintered magnet. The heat treating is carried out at a temperature T for a time t selected to allow diffusion of the rare earth element R′ into the precursor sintered magnet to produce a magnet. The further material remains solid and particulate after the heat treating.

摘要翻译： 提供了一种稀土类磁体的制造方法，其特征在于，提供前体烧结的R2Fe14B型磁体，其中R表示稀土元素，将包含稀土元素R'的颗粒施加到前体烧结磁体的第一表面，施加 将另外材料的颗粒加到前体磁体的第一表面和/或前体磁体的另一表面上，并对前体烧结磁体进行热处理。 热处理在T选择的时间t进行，以允许稀土元素R'扩散到前体烧结磁体中以产生磁体。 进一步的材料在热处理后保持固体和颗粒。

公开(公告)号：US08421292B2

公开(公告)日：2013-04-16

申请号：US12593107

申请日：2008-03-25

申请人： Mitsutoshi Natsumeda ,  Yoshinori Takayama ,  Motoharu Shimizu

发明人： Mitsutoshi Natsumeda ,  Yoshinori Takayama ,  Motoharu Shimizu

IPC分类号： H02K21/38 ,  H01F1/03 ,  C21D5/06

CPC分类号： H02K1/02 ,  H01F41/0293 ,  H02K1/2766 ,  H02K1/278 ,  Y10T29/49009

摘要： A permanent magnet motor includes: a rotor and a stator; and a plurality of permanent magnets placed on either the rotor or the stator. Each permanent magnet is an R—Fe—B based rare-earth sintered magnet including a light rare-earth element RL (at least one of Nd and Pr) as a major rare-earth element R, and partially includes a high coercivity portion in which a heavy rare-earth element RH (at least one element selected from the group consisting of Dy, Ho and Tb) is diffused in a relatively higher concentration than in the other portion.

摘要翻译： 永磁电动机包括：转子和定子; 以及放置在转子或定子上的多个永磁体。 每个永磁体是包含作为主要稀土元素R的轻稀土元素RL（Nd和Pr中的至少一种）的R-Fe-B系稀土烧结磁体，并且部分地包括高的矫顽力部分 其中重稀土元素RH（选自Dy，Ho和Tb中的至少一种元素）以比其他部分更高的浓度扩散。

公开(公告)号：US08420160B2

公开(公告)日：2013-04-16

申请号：US12441124

申请日：2007-07-23

申请人： Masato Sagawa

发明人： Masato Sagawa

IPC分类号： G11B5/00 ,  H01F1/00 ,  H01F1/053

CPC分类号： H01F41/005 ,  B22F3/1039 ,  B22F7/06 ,  B22F2003/248 ,  B22F2999/00 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  H01F1/0577 ,  H01F41/0293 ,  B22F2202/01 ,  B22F2201/20

摘要： The present invention provides a method for producing a sintered NdFeB magnet having high coercivity and capable of being brought into applications without lowering its residual magnetic flux density or maximum energy product and without reprocessing. The method for producing a sintered NdFeB magnet according to the present invention includes applying a substance containing dysprosium (Dy) and/or terbium (Tb) to the surface of the sintered NdFeB magnet forming a base body and then heating the magnet to diffuse Dy and/or Tb through the grain boundary and thereby increase the coercivity of the magnet. This method is characterized in that: (1) the substance containing Dy or Tb to be applied to the surface of the sintered NdFeB magnet is substantially a metal powder; (2) the metal powder is composed of a rare-earth element R and an iron-group transition element T, or composed of R, T and another element X, the element X capable of forming an alloy or intermetallic compound with R and/or T; and (3) the oxygen content of the sintered NdFeB magnet forming the base body is 5000 ppm or lower. The element T may contain nickel (Ni) or cobalt (Co) to produce an anticorrosion effect.

摘要翻译： 本发明提供一种制造具有高矫顽力的NdFeB烧结磁体的方法，能够在不降低其剩余磁通密度或最大能量产物的情况下进行应用，而不需要后处理。 根据本发明的NdFeB烧结磁体的制造方法包括将镝（Dy）和/或铽（Tb）的物质施加到形成基体的NdFeB烧结磁体的表面，然后加热磁体以扩散Dy和 /或Tb，从而提高磁体的矫顽力。 该方法的特征在于：（1）应用于烧结NdFeB磁体表面的含有Dy或Tb的物质基本上是金属粉末; （2）金属粉末由稀土元素R和铁基过渡元素T构成，或由R，T和另一元素X构成，能够与R和/ 或T; 和（3）形成基体的烧结NdFeB磁体的氧含量为5000ppm以下。 元素T可以含有镍（Ni）或钴（Co）以产生抗腐蚀效果。