公开(公告)号：US08420010B2

公开(公告)日：2013-04-16

申请号：US11916498

申请日：2007-03-28

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： B22F7/00

CPC分类号： C23C10/30 ,  B22F3/24 ,  B22F2003/241 ,  B22F2003/242 ,  B22F2003/247 ,  B22F2003/248 ,  C21D6/00 ,  C22C38/005 ,  C22C2202/02 ,  C23C10/28 ,  C23C10/52 ,  C23C24/08 ,  H01F1/0577 ,  H01F41/0293

摘要： A method for preparing a rare earth permanent magnet material is characterized by comprising the steps of disposing a powder mixture on a surface of a sintered magnet body of R1—Fe—B composition wherein R1 is at least one element selected from rare earth elements inclusive of Sc and Y, the powder mixture comprising a powder containing at least 0.5% by weight of M which is at least one element selected from Al, Cu, and Zn and having an average particle size equal to or less than 300 μm and a powder containing at least 30% by weight of a fluoride of R2 which is at least one element selected from rare earth elements inclusive of Sc and Y and having an average particle size equal to or less than 100 μm, and heat treating the magnet body having the powder disposed on its surface at a temperature equal to or below the sintering temperature of the magnet body in vacuum or in an inert gas, for causing at least one of M and R2 in the powder mixture to be absorbed in the magnet body. The invention provides an R—Fe—B sintered magnet with high performance and a minimized amount of Tb or Dy used.

摘要翻译： 一种制备稀土永磁材料的方法的特征在于包括以下步骤：在R1-Fe-B组合物的烧结磁体的表面上设置粉末混合物，其中R 1是选自稀土元素中的至少一种元素，包括 Sc和Y，所述粉末混合物包含含有至少0.5重量％M的至少一种选自Al，Cu和Zn的元素并且具有等于或小于300μm的平均粒度的粉末和包含 至少30重量％的R 2的氟化物，其为选自包括Sc和Y的稀土元素中的至少一种元素，并且具有等于或小于100μm的平均粒度，并且对具有粉末的磁体进行热处理 在真空中或在惰性气体中的等于或低于磁体的烧结温度的温度下，在粉末混合物中使M和R2中的至少一个吸收在磁体中。 本发明提供一种具有高性能和最小量的Tb或Dy的R-Fe-B烧结磁体。

公开(公告)号：US07955443B2

公开(公告)日：2011-06-07

申请号：US11783639

申请日：2007-04-11

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： H01F1/057

CPC分类号： H01F41/0293 ,  H01F1/0577

摘要： 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 the like, with a powder comprising an oxide of R2, a fluoride of R3 or an oxyfluoride of R4 wherein R2, R3, and R4 are rare earth elements, and having an average particle size up to 100 μm, heat treating the powder-covered magnet body in a hydrogen gas-containing atmosphere for inducing disproportionation reaction on R12Fe14B compound, and continuing heat treatment at a reduced hydrogen gas partial pressure for inducing recombination reaction to said compound, thereby finely dividing said compound phase to a crystal grain size up to 1 μm, and for effecting absorption treatment, thereby causing R2, R3 or R4 to be absorbed in the magnet body.

摘要翻译： 通过覆盖式为：R1x（Fe1-yCoy）100-xz-aBzMa的各向异性烧结磁体，其中R1是稀土元素，M是Al，Cu等，并且包含氧化物 的R2，R3的氟化物或R4的氟氧化物，其中R2，R3和R4是稀土元素，平均粒径高达100μm，在含氢气体的气氛中对粉末包覆的磁体进行热处理 用于在R12Fe14B化合物上诱导歧化反应，并且在降低的氢气分压下继续热处理以诱导与所述化合物的复合反应，从而将所述化合物相细分至1μm以上的晶粒尺寸，从而进行吸收处理 导致R2，R3或R4被吸收在磁体中。

公开(公告)号：US07531933B2

公开(公告)日：2009-05-12

申请号：US11846690

申请日：2007-08-29

申请人： Koji Miyata ,  Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

发明人： Koji Miyata ,  Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

IPC分类号： H02K1/27

CPC分类号： H02K1/02 ,  H01F1/0577 ,  H01F41/0293 ,  H02K1/278 ,  H02K15/03 ,  H02K29/03

摘要： In a rotating machine comprising a rotor including a rotor core and a plurality of permanent magnet segments, and a stator including a stator core and windings, the permanent magnet segment is obtained by disposing a powder comprising an R2 oxide, R3 fluoride or R4 oxyfluoride on a sintered magnet body of R1—Fe—B composition, wherein R1 to R4 are rare earth elements, and heat treating the powder-covered magnet body. The permanent magnet segment of a cross-sectional shape which is tapered from the center toward opposed ends has a higher coercive force at the ends than at the center.

摘要翻译： 在包括转子铁心和多个永久磁铁段的转子和包括定子铁心和绕组的定子的旋转机械中，通过将包含R2氧化物，R3氟化物或R4氟氧化物的粉末设置在 R1-Fe-B组合物的烧结磁体，其中R1至R4为稀土元素，并对粉末覆盖的磁体进行热处理。 从中心向相对端逐渐变细的横截面形状的永磁体段在端部具有比中心更高的矫顽力。

公开(公告)号：US07488393B2

公开(公告)日：2009-02-10

申请号：US11340498

申请日：2006-01-27

申请人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： H01F1/0577 ,  B22F2009/041 ,  B22F2009/044 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/0278 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/058 ,  H01F41/0266 ,  H01F41/0293 ,  B22F9/04 ,  B22F2201/02 ,  B22F2202/05 ,  B22F9/023 ,  B22F3/02 ,  B22F3/10

摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, and the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm. The invention provides R—Fe—B sintered magnets which exhibit high magnet performance despite minimal amounts of Tb and Dy used.

摘要翻译： 稀土永磁体为具有组成R1aR2bTcAdFeOfMg的烧结磁体的形式，其中F和R2分布成使得它们的浓度从中心向磁体的平均值增加，R2 /（R1 包含在烧结磁体内的（R1，R2）2T14A四方晶系的主相晶粒周围的晶界中的+ R2）平均高于主晶粒中所含的R2 /（R1 + R2）的浓度， （R1，R2）的氟氧化物存在于从磁体表面延伸至至少20μm的深度的晶界区域的晶界处。 本发明提供了尽管使用最少量的Tb和Dy，其表现出高磁性能的R-Fe-B烧结磁体。

公开(公告)号：US20070017601A1

公开(公告)日：2007-01-25

申请号：US11489595

申请日：2006-07-20

申请人： Koji Miyata ,  Koichi Hirota ,  Hajime Nakamura ,  Takehisa Minowa

发明人： Koji Miyata ,  Koichi Hirota ,  Hajime Nakamura ,  Takehisa Minowa

IPC分类号： H01F1/03

CPC分类号： H02K1/278 ,  B22F3/24 ,  B22F2003/242 ,  B22F2003/245 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0293 ,  H02K15/03 ,  C22C33/0278 ,  B22F3/10 ,  B22F2201/10 ,  B22F2201/20

摘要： A rare earth permanent magnet is prepared from a sintered magnet body of a R1—Fe—B composition wherein R1 is a rare earth element inclusive of Y and Sc, by forming a plurality of slits in a surface of the magnet body, disposing a powder on the magnet body surface, the powder comprising an oxide of R2, a fluoride of R3, or an oxyfluoride of R4 wherein each of R2, R3, and R4 is a rare earth element, and heat treating the magnet body and the powder below the sintering temperature in vacuum or in an inert gas.

摘要翻译： 稀土永磁体由R 1 -Fe-B组合物的烧结磁体制备，其中R 1是含有Y和Sc的稀土元素，由R 1〜 在磁体表面形成多个狭缝，在粉末表面上设置粉末，该粉末包含R 2氧化物，R 3 O 3的氟化物， 或R 4的氟氧化物，其中R 2，R 3和R 4中的每一个是罕见的 并且在真空或惰性气体中将磁体和粉末热处理在烧结温度以下。

公开(公告)号：US08211327B2

公开(公告)日：2012-07-03

申请号：US10572753

申请日：2005-03-22

申请人： Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

IPC分类号： C04B35/04 ,  C04B35/64 ,  C04B35/40 ,  C04B35/26 ,  H01F1/00 ,  H01F1/26 ,  H01F1/04 ,  H01F1/14 ,  B22F3/00

CPC分类号： B22F9/023 ,  B22F2009/044 ,  B22F2998/10 ,  B22F2999/00 ,  H01F1/0577 ,  H01F41/0293 ,  H01J37/32669 ,  B22F9/04 ,  B22F3/02 ,  B22F3/10 ,  B22F2201/11 ,  B22F2201/02

摘要： A method for preparing a rare earth permanent magnet material comprising the steps of: disposing a powder comprising one or more members selected from an oxide of R2, a fluoride of R3, and an oxyfluoride of R4 wherein R2, R3 and R4 each are one or more elements selected from among rare earth elements inclusive of Y and Sc on a sintered magnet form of a R1—Fe—B composition wherein R1 is one or more elements selected from among rare earth elements inclusive of Y and Sc, and heat treating the magnet form and the powder at a temperature equal to or below the sintering temperature of the magnet in vacuum or in an inert gas. The invention offers a high performance, compact or thin permanent magnet having a high remanence and coercivity at a high productivity.

摘要翻译： 一种制备稀土永磁材料的方法，包括以下步骤：设置包含一种或多种选自R 2的氧化物，R 3的氟化物和R 4的氟氧化物的一种或多种的粉末，其中R 2，R 3和R 4各自为一个或 选自包含Y和Sc的稀土元素中的更多元素是R1-Fe-B组合物的烧结磁体形式，其中R1是选自包括Y和Sc的稀土元素中的一种或多种元素，并且对磁体进行热处理 在等于或低于磁体在真空或惰性气体中的温度的温度下形成粉末。 本发明以高生产率提供具有高剩磁和矫顽力的高性能，紧凑或薄的永久磁铁。

公开(公告)号：US20060213583A1

公开(公告)日：2006-09-28

申请号：US11340498

申请日：2006-01-27

申请人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： H01F1/0577 ,  B22F2009/041 ,  B22F2009/044 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/0278 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/058 ,  H01F41/0266 ,  H01F41/0293 ,  B22F9/04 ,  B22F2201/02 ,  B22F2202/05 ,  B22F9/023 ,  B22F3/02 ,  B22F3/10

摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, and the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm. The invention provides R—Fe—B sintered magnets which exhibit high magnet performance despite minimal amounts of Tb and Dy used.

摘要翻译： 稀土永磁体是具有组成R 1的烧结磁体的形式，其中R 1，R 2，R 2， 其中F和R（R）其中F和R 分散使得它们的浓度从中心向磁体的表面的平均值增加，R 2的浓度（R 1> 1 / 包含在（R 1，R 2，R 2）2）的主相晶粒周围的晶界中所含的（SUP + + R 2） 烧结磁体中的四方晶系平均高于R 2 O 2的浓度（R 1→R 2 + SUP> 2），并且（R 1，R 2，R 2）的氟氧化物存在于晶界区域的晶界处 其从磁体表面延伸至至少20μm的深度。 本发明提供了尽管使用最少量的Tb和Dy，其表现出高磁性能的R-Fe-B烧结磁体。

公开(公告)号：US20060213582A1

公开(公告)日：2006-09-28

申请号：US11340496

申请日：2006-01-27

申请人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： H01F1/0577 ,  H01F1/058 ,  H01F41/0266 ,  H01F41/0293

摘要： A functionally graded rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, R2 is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm, and the magnet body includes a surface layer having a higher coercive force than in the interior. The invention provides permanent magnets having improved heat resistance.

摘要翻译： 功能梯度稀土永磁体是烧结磁体的形式，具有组成R 1，B 2，B 2，B 2， 其中，在本发明的另一个实施方案中， 包含在（R 1）的主相晶粒周围的晶界中的R 2 O 2的浓度（R 1→R 2） 烧结磁体中的四方晶系平均高于R 2 /（R 1→R 2 + 2）是分布的，使得其浓度 从中心向磁体的表面平均增加，（R 1，R 2，R 2）的氟氧化物存在于晶界区域的晶界处， 从磁体表面延伸到至少20μm的深度，并且磁体包括具有较高矫顽力的表面层 比在室内。 本发明提供了具有改善的耐热性的永磁体。

公开(公告)号：US08756793B2

公开(公告)日：2014-06-24

申请号：US12889835

申请日：2010-09-24

申请人： Yuhito Doi ,  Takehisa Minowa ,  Hajime Nakamura ,  Koichi Hirota

发明人： Yuhito Doi ,  Takehisa Minowa ,  Hajime Nakamura ,  Koichi Hirota

IPC分类号： H02K15/02

CPC分类号： H02K15/03 ,  H01F7/0221 ,  H02K1/2766 ,  Y10T29/49009 ,  Y10T29/49012

摘要： An interior permanent magnet (IPM) rotary machine comprises a rotor comprising a rotor yoke having bores and a plurality of permanent magnet segments disposed in the bores of the rotor yoke, each permanent magnet segment consisting of a plurality of magnet pieces. The rotor is assembled by inserting the plurality of unbound magnet pieces in each bore for stacking the magnet pieces, and fixedly securing the stacked magnet pieces in the bore.

摘要翻译： 内置永磁（IPM）旋转机器包括转子，该转子包括具有孔的转子轭和设置在转子轭的孔中的多个永磁体段，每个永磁体段由多个磁片组成。 通过将多个未结合的磁体片插入每个孔中以堆叠磁体片并将堆叠的磁体片牢固地固定在孔中来组装转子。

公开(公告)号：US08231740B2

公开(公告)日：2012-07-31

申请号：US11783782

申请日：2007-04-12

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： H01F1/057

CPC分类号： H01F41/0293 ,  H01F1/0577

摘要： A rare earth permanent magnet material is prepared by covering a sintered magnet body of R1—Fe—B composition wherein R1 is a rare earth element, with a powder comprising at least 30% by weight of an alloy of R2aTbMcAdHe wherein R2 is a rare earth element, T is Fe and/or Co, and M is Al, Cu or the like, and having an average particle size up to 100 μm, and heat treating the powder-covered magnet body at a suitable temperature, for causing R2, T, M and A in the powder to be absorbed in the magnet body.

摘要翻译： 制备稀土永磁材料，其中R 1是稀土元素的R1-Fe-B组合物的烧结磁体，包含至少30重量％的R2aTbMcAdHe的合金的粉末，其中R2是稀土元素 元素，T为Fe和/或Co，M为Al，Cu等，平均粒径为100μm以下，在合适的温度下对粉末覆盖的磁体进行热处理，使R2，T ，M和A在粉末中被吸收在磁体中。