公开(公告)号：US06833036B2

公开(公告)日：2004-12-21

申请号：US10185767

申请日：2002-06-27

申请人： Makoto Nakane ,  Eiji Kato ,  Chikara Ishizaka ,  Akira Fukuno

发明人： Makoto Nakane ,  Eiji Kato ,  Chikara Ishizaka ,  Akira Fukuno

IPC分类号： H01F1057

CPC分类号： H01F1/057 ,  H01F1/0577

摘要： A rare earth permanent magnet consists of 20-40 wt % of at least one rare earth element R, 0.5-4.5 wt % of boron B, 0.03-0.5 wt % of M (at least one of Al, Cu, Sn and Ga), 0.01-0.2 wt % of Bi, and the balance being at least one transition metal element T.

摘要翻译： 稀土永磁体基本上由20-40重量％的至少一种稀土元素R，0.5-4.5重量％的硼B，0.03-0.5重量％的M（Al，Cu，Sn和Ga中的至少一种）组成 ），0.01-0.2重量％的Bi，余量为至少一种过渡金属元素T.

公开(公告)号：US07314531B2

公开(公告)日：2008-01-01

申请号：US10799153

申请日：2004-03-11

申请人： Chikara Ishizaka ,  Gouichi Nishizawa ,  Tetsuya Hidaka ,  Akira Fukuno ,  Yoshinori Fujikawa

发明人： Chikara Ishizaka ,  Gouichi Nishizawa ,  Tetsuya Hidaka ,  Akira Fukuno ,  Yoshinori Fujikawa

IPC分类号： H01F1/057

CPC分类号： H01F1/0577

摘要： 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 include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co), and a grain boundary phase containing a higher amount of R than the main phase, wherein a platy or acicular product exists. This sintered body enables to inhibit the grain growth, while keeping a decrease in magnetic properties to a minimum, and to improve a suitable sintering temperature range.

摘要翻译： 一种烧结体，其包含由R 2 2 T 14 B相构成的主相（其中R表示一种或多种稀土元素（使得稀土元素包括Y） ，T表示一种或多种基本上含有Fe或Fe和Co的过渡金属元素，以及含有比主相高的R的晶界相，其中存在片状或针状产物。 该烧结体能够抑制晶粒生长，同时将磁特性降低至最小，并提高合适的烧结温度范围。

公开(公告)号：US07255752B2

公开(公告)日：2007-08-14

申请号：US10799243

申请日：2004-03-11

申请人： Chikara Ishizaka ,  Gouichi Nishizawa ,  Tetsuya Hidaka ,  Akira Fukuno ,  Nobuya Uchida

发明人： Chikara Ishizaka ,  Gouichi Nishizawa ,  Tetsuya Hidaka ,  Akira Fukuno ,  Nobuya Uchida

IPC分类号： H01F1/057

CPC分类号： H01F1/0577 ,  H01F41/0293

摘要： 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 include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co), and a grain boundary phase containing a higher amount of R than the above main phase, wherein a product that is rich in Zr exists in the above R2T14B phase, the above manufacturing method comprising the steps of: preparing an R-T-B alloy containing as a main component the R2T14B phase and also containing Zr, and an R-T alloy containing R and T as main components, wherein the amount of R is higher than that of the above R-T-B alloy; obtaining a mixture of the R-T-B alloy powder and the R-T alloy powder; preparing a compacted body with a certain form from the above mixture; and sintering the above compacted body, wherein, in the above sintering step, the above product is generated in the above R2T14B phase.

摘要翻译： 一种用于制造RTB系稀土永磁体的方法，该稀土永磁体是包括由R 2 T 14 B相（其中R表示一个或多个）的主相的烧结体 稀土元素（含有Y的稀土元素），T表示基本上含有Fe或Fe，Co的一种以上的过渡金属元素，以及比上述主相含有更多的R的晶界相， 其中富含Zr的产物存在于上述R 2 T 14 B相中，上述制备方法包括以下步骤：制备含有主要的RTB合金 组成R 2 T 14 T B相并且还含有Zr，以及含有R和T作为主要成分的RT合金，其中R的量高于 以上RTB合金; 得到R-T-B合金粉末和R-T合金粉末的混合物; 从上述混合物制备具有某种形式的压实体; 并烧结上述压实体，其中在上述烧结步骤中，在上述R 2 T 14 B相中产生上述产物。

公开(公告)号：US07255751B2

公开(公告)日：2007-08-14

申请号：US10675797

申请日：2003-09-29

申请人： Gouichi Nishizawa ,  Chikara Ishizaka ,  Tetsuya Hidaka ,  Akira Fukuno

发明人： Gouichi Nishizawa ,  Chikara Ishizaka ,  Tetsuya Hidaka ,  Akira Fukuno

IPC分类号： H01F1/057

CPC分类号： H01F41/0253 ,  H01F1/0557 ,  H01F1/0577

摘要： When an R-T-B system rare earth permanent magnet is obtained by a mixing method to obtain a sintered body with a composition consisting essentially of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, providing that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe, wherein a coefficient of variation (CV) showing the dispersion of Zr is 130 or lower, Zr is contained in a low R alloy. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.

摘要翻译： 当通过混合方法获得具有组成基本上由25％至35％的R组成的烧结体获得RTB系稀土永磁体时（其中R表示一种或多种稀土元素，条件是稀土元素 元素包括Y），0.5〜4.5重量％的B，0.02〜0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不含0） Co，余量基本上为Fe，其中显示Zr分散的变异系数（CV）为130以下，Zr含有低R合金。 该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。

公开(公告)号：US07192493B2

公开(公告)日：2007-03-20

申请号：US10675912

申请日：2003-09-29

申请人： Gouichi Nishizawa ,  Chikara Ishizaka ,  Tetsuya Hidaka ,  Akira Fukuno

发明人： Gouichi Nishizawa ,  Chikara Ishizaka ,  Tetsuya Hidaka ,  Akira Fukuno

IPC分类号： H01F1/057

CPC分类号： H01F41/0253 ,  H01F1/0557 ,  H01F1/0577

摘要： A sintered body with a composition consisting of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, providing that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe, wherein a coefficient of variation (CV) showing the dispersion of Zr is 130 or lower. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.

摘要翻译： 一种组成为25重量％至35重量％的R组成的烧结体（其中R表示一种或多种稀土元素，条件是稀土元素包括Y），0.5重量％至4.5重量％的B，0.02重量％ 至0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不含0）的Co，余量实质上为Fe，其中变异系数（CV） 显示Zr的分散体为130以下。 该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。

公开(公告)号：US07311788B2

公开(公告)日：2007-12-25

申请号：US10675230

申请日：2003-09-29

申请人： Gouichi Nishizawa ,  Chikara Ishizaka ,  Tetsuya Hidaka ,  Akira Fukuno ,  Yoshinori Fujikawa

发明人： Gouichi Nishizawa ,  Chikara Ishizaka ,  Tetsuya Hidaka ,  Akira Fukuno ,  Yoshinori Fujikawa

IPC分类号： H01F1/057

CPC分类号： C22C28/00 ,  C22C1/0441 ,  C22C30/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  H01F1/0557 ,  H01F1/0577 ,  H01F41/0253

摘要： A sintered body with a composition consisting of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, provided that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe. This sintered body has a coefficient of variation (CV value) showing the dispersion degree of Zr of 130 or less. In addition, this sintered body has a grain boundary phase comprising a region that is rich both in at least one element selected from a group consisting of Cu, Co and R, and in Zr. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.

摘要翻译： 具有25重量％至35重量％的R（其中R表示一种或多种稀土元素，条件是稀土元素包括Y），0.5重量％至4.5重量％的B组成的烧结体，0.02重量％ 至0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不包括0）的Co，余量实质上为Fe。 该烧结体具有显示Zr的分散度为130以下的变异系数（CV值）。 此外，该烧结体具有包含富含选自Cu，Co和R中的至少一种元素的区域和在Zr中的区域的晶界相。 该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。

公开(公告)号：US06811620B2

公开(公告)日：2004-11-02

申请号：US10799203

申请日：2004-03-11

申请人： Chikara Ishizaka ,  Gouichi Nishizawa ,  Tetsuya Hidaka ,  Akira Fukuno ,  Nobuya Uchida

发明人： Chikara Ishizaka ,  Gouichi Nishizawa ,  Tetsuya Hidaka ,  Akira Fukuno ,  Nobuya Uchida

IPC分类号： H01F1053

CPC分类号： H01F1/0577 ,  H01F41/0293

摘要： An R—T—B system rare earth permanent magnet, which 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 include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co); and a grain boundary phase containing a higher amount of R than the above main phase, wherein a product that is rich in Zr exists in the above R2T14B phase. The product that is rich in Zr has a platy or acicular form. The R—T—B system rare earth permanent magnet containing the product enables to inhibit the grain growth, while keeping a decrease in magnetic properties to a minimum, and to obtain a wide suitable sintering temperature range.

摘要翻译： 一种RTB系稀土永磁体，其为烧结体，包括：由R2T14B相（其中R表示一种或多种稀土元素（提供稀土元素包括Y））组成的主相，T表示一种或多种 过渡金属元素基本上含有Fe或Fe和Co）; 以及含有比上述主相含量更高的R的晶界相，其中在上述R2T14B相中存在富含Zr的产物。 富含Zr的产品具有扁平或针状。 含有该产品的R-T-B系稀土永磁体能够抑制晶粒生长，同时将磁性降低至最小，并获得宽的合适的烧结温度范围。

公开(公告)号：US07465363B2

公开(公告)日：2008-12-16

申请号：US10540345

申请日：2004-01-28

申请人： Atsushi Sakamoto ,  Makoto Nakane ,  Hideki Nakamura ,  Akira Fukuno

发明人： Atsushi Sakamoto ,  Makoto Nakane ,  Hideki Nakamura ,  Akira Fukuno

IPC分类号： H01F1/058 ,  H01F1/059

CPC分类号： H01F1/0558 ,  C22C38/001 ,  C22C38/005 ,  C22C38/02 ,  C22C38/10 ,  C22C38/14 ,  H01F1/058 ,  H01F1/0593

摘要： A single phase consisting of a ThMn12 phase can be obtained by having the composition thereof represented by a general formula R(Fe100-y-wCowTiy)xSizAv (in the general formula, R is at least one element selected from rare earth elements (here the rare earth elements signify a concept inclusive of Y), Nd accounts for 50 mol % or more of R, and A is N and/or C) in which the molar ratios in the general formula are such that x=10 to 12.5, y=(8.3−1.7×z) to 12.3, z=0.1 to 2.3, v=0.1 to 3 and w=0 to 30, and the relation (Fe+Co+Ti+Si)/R>12 is satisfied.

摘要翻译： 由ThMn12相组成的单相可以通过使其组成由通式R（Fe100-y-wCowTiy）xSizAv表示（在通式中，R是选自稀土元素中的至少一种元素（这里是 稀土元素表示包括Y）的概念，Nd占R的50摩尔％以上，A是N和/或C），其中通式中的摩尔比使得x = 10〜12.5，y =（8.3-1.7×z）〜12.3，z = 0.1〜2.3，v = 0.1〜3，w = 0〜30，满足关系式（Fe + Co + Ti + Si）/R≥12。

公开(公告)号：US20060169360A1

公开(公告)日：2006-08-03

申请号：US10540345

申请日：2004-01-28

申请人： Atsushi Sakamoto ,  Makoto Nakane ,  Hideki Nakamura ,  Akira Fukuno

发明人： Atsushi Sakamoto ,  Makoto Nakane ,  Hideki Nakamura ,  Akira Fukuno

IPC分类号： H01F1/058 ,  H01F1/059

CPC分类号： H01F1/0558 ,  C22C38/001 ,  C22C38/005 ,  C22C38/02 ,  C22C38/10 ,  C22C38/14 ,  H01F1/058 ,  H01F1/0593

摘要： A single phase consisting of a ThMn12 phase can be obtained by having the composition thereof represented by a general formula R(Fe100-y-wCowTiy)xSizAv (in the general formula, R is at least one element selected from rare earth elements (here the rare earth elements signify a concept inclusive of Y), Nd accounts for 50 mol % or more of R, and A is N and/or C) in which the molar ratios in the general formula are such that x=10 to 12.5, y=(8.3−1.7×z) to 12.3, z=0.1 to 2.3, v=0.1 to 3 and w=0 to 30, and the relation (Fe+Co+Ti+Si)/R>12 is satisfied.

摘要翻译： 由ThMn 12相组成的单相可以通过使其组成由通式R（Fe）100-y w / Co （在通式中，R是选自至少一个元素） 来自稀土元素（这里的稀土元素表示包括Y的概念），Nd占R的50mol％以上，A是N和/或C），其中通式中的摩尔比使得 x = 10〜12.5，y =（8.3-1.7×z）〜12.3，z = 0.1〜2.3，v = 0.1〜3，w = 0〜30，关系式（Fe + Co + Ti + Si） 12满足。

公开(公告)号：US5665177A

公开(公告)日：1997-09-09

申请号：US878523

申请日：1992-05-05

申请人： Akira Fukuno ,  Hideki Nakamura ,  Tetsuhito Yoneyama

发明人： Akira Fukuno ,  Hideki Nakamura ,  Tetsuhito Yoneyama

IPC分类号： B22D11/06 ,  B22F1/00 ,  B22F3/00 ,  H01F1/053 ,  H01F1/057 ,  H01F41/02 ,  H01F1/032

CPC分类号： B22D11/0611 ,  H01F1/0571 ,  Y10S428/90 ,  Y10T428/2457 ,  Y10T428/31

摘要： A permanent magnet material is prepared by cooling with a chill roll a molten alloy containing R wherein R is at least one rare earth element inclusive of Y, Fe or Fe and Co, and B. The chill roll has a plurality of circumferentially extending grooves in a circumferential surface, the distance between two adjacent ones of the grooves at least in a region with which the molten alloy comes in contact being 100 to 300 .mu.m average in an arbitrary cross section containing a roll axis. Permanent magnet material of stable performance is obtained since the variation of cooling rate caused by a change in the circumferential speed of the chill roll is small. The variation of cooling rate is small even when it is desired to change the thickness of the magnet by altering the circumferential speed. The equalized groove pitch results in a minimized variation in crystal grain diameter.

摘要翻译： 通过用冷却辊冷却含有R的熔融合金来制备永久磁铁材料，其中R是至少一种包括Y，Fe或Fe和Co以及B的稀土元素。冷却辊具有多个周向延伸的凹槽 至少在熔融合金接触的区域中，两个相邻的槽之间的距离在包含辊轴的任意横截面中平均为100〜300μm。 由于冷却辊的圆周速度的变化引起的冷却速度的变化小，所以获得了稳定性能的永久磁铁材料。 即使希望通过改变圆周速度来改变磁体的厚度，冷却速度的变化也很小。 均匀的沟槽间距导致晶粒直径的最小化。