公开(公告)号：US20100295644A1

公开(公告)日：2010-11-25

申请号：US12599145

申请日：2008-05-09

Applicant: Atsushi Kikugawa ,  Koshi Yoshimura ,  Yoshimi Tochishita ,  Masanao Kamachi ,  Nobuhiro Misumi

Inventor： Atsushi Kikugawa ,  Koshi Yoshimura ,  Yoshimi Tochishita ,  Masanao Kamachi ,  Nobuhiro Misumi

IPC: H01F7/00 ,  B05D5/00 ,  B05D3/02

CPC classification number: C23C14/226 ,  C23C14/14 ,  C23C14/246 ,  C23C14/505 ,  H01F1/0577 ,  H01F7/0221 ,  H01F41/026 ,  Y10T428/32 ,  Y10T428/325

Abstract: An objective of the present invention is to provide an R—Fe—B based sintered magnet having on the surface thereof a vapor deposited film of aluminum or an alloy thereof, which maintains excellent adhesion strength with the adhered object even after subjecting it to a severe heat cycle test, and a method for producing the same. As a means for solving the problems, an R—Fe—B based sintered magnet having on the surface thereof a vapor deposited film of aluminum or an alloy thereof of the present invention is characterized in that the vapor deposited film of aluminum or an alloy thereof comprises a columnar crystalline structure grown broader from the surface of the bulk magnet body outward to the outer surface, which has a part within a region defined in the thickness direction of the film as taken from the surface of the bulk magnet body to ⅓ of the film thickness, 5 to 30 intercrystalline gaps of 0.01 μm to 1 μm in width as counted per 10 μm length in the lateral direction of the film are existing at the part. The method for producing the same is characterized by, on forming the vapor deposited film of aluminum or an alloy thereof on the surface of the R—Fe—B based sintered magnet, individually controlling the average film formation rate in the initial stage and in the later stage of the film formation as such that it is slower up to a predetermined point, and that it is speeded up later thereon.

Abstract translation: 本发明的目的是提供一种R-Fe-B系烧结磁体，其表面上具有铝或其合金的气相沉积膜，即使经受严重的粘合，也能与粘合物保持优异的粘合强度 热循环试验及其制造方法。 作为解决问题的手段，在本发明的表面具有铝或其合金的蒸镀膜的R-Fe-B系烧结磁体的特征在于，铝或其合金的蒸镀膜 包括从本体磁体的表面向外延伸到外表面的柱状晶体结构，其具有在从体磁体的表面取出的膜的厚度方向上限定的区域内的1/3 在该部分存在薄膜厚度，在膜的横向上每10μm长度计数为0.01μm至1μm的宽度为5至30个晶间间隙。 其制造方法的特征在于，在R-Fe-B系烧结磁体的表面上形成铝蒸气沉积膜或其合金时，分别控制初始阶段的平均成膜速率和 胶片形成的后期使得其延迟到预定点，并且其稍后加速。

公开(公告)号：US20100182113A1

公开(公告)日：2010-07-22

申请号：US12666323

申请日：2008-07-01

Applicant: Koshi Yoshimura ,  Hideyuki Morimoto ,  Tomoori Odaka

Inventor： Koshi Yoshimura ,  Hideyuki Morimoto ,  Tomoori Odaka

IPC: H01F7/02 ,  B05D5/00

CPC classification number: C22C38/005 ,  B22F3/24 ,  B22F2003/248 ,  B22F2999/00 ,  C22C33/0278 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0293 ,  B22F2207/01 ,  B22F2201/20

Abstract: In an R—Fe—B based rare-earth sintered magnet according to the present invention, at a depth of 20 μm under the surface of its magnet body, crystal grains of an R2Fe14B type compound have an (RL1-xRHx)2Fe14B (where 0.2≦x≦0.75) layer with a thickness of 1 nm to 2 μm in their outer periphery. In this case, the light rare-earth element RL is at least one of Nd and Pr, and the heavy rare-earth element RH is at least one element selected from the group consisting of Dy, Ho and Tb.

Abstract translation: 在根据本发明的R-Fe-B系稀土烧结磁体中，在其磁体表面的20μm深处，R2Fe14B型化合物的晶粒具有（RL1-xRHx）2Fe14B（其中 0.2＆nlE; x＆nlE; 0.75）层，其外周的厚度为1nm〜2μm。 在这种情况下，轻稀土元素RL是Nd和Pr中的至少一种，重稀土元素RH是选自Dy，Ho和Tb中的至少一种元素。