发明名称 |
SINTERED BODY THAT IS PRECURSOR OF RARE-EARTH MAGNET, AND METHOD FOR PRODUCING MAGNETIC POWDER FOR FORMING THE SAME |
摘要 |
Provided are a sintered body for forming a rare-earth magnet with a high degree of orientation and high remanent magnetization, and a method for producing magnetic powder for forming the sintered body. A sintered body S that is a precursor of a rare-earth magnet, the sintered body S including crystal grains g2 of an Nd—Fe—B-based main phase with a nanocrystalline structure, and a grain boundary phase around the main phase, and the rare-earth magnet being adapted to be formed by applying hot deformation processing to the sintered body S for imparting anisotropy thereto and further diffusing an alloy for improving coercivity therein. Each crystal grain g2 that forms the sintered body S has a planar shape that is, when viewed from a direction perpendicular to an easy direction of magnetization (i.e., a c-axis direction), a rectangle having sides in the c-axis direction and sides in a direction (i.e., an a-axis direction) that is perpendicular to the c-axis direction, or a shape that is close to the rectangle. |
申请公布号 |
US2014238553(A1) |
申请公布日期 |
2014.08.28 |
申请号 |
US201214350418 |
申请日期 |
2012.10.09 |
申请人 |
Sakuma Noritsugu;Kishimoto Hidefumi;Yano Masao |
发明人 |
Sakuma Noritsugu;Kishimoto Hidefumi;Yano Masao |
分类号 |
H01F1/053;B22F9/06;H01F41/00 |
主分类号 |
H01F1/053 |
代理机构 |
|
代理人 |
|
主权项 |
1. A sintered body that is a precursor of a rare-earth magnet, the sintered body including crystal grains of an Nd—Fe—B-based main phase with a nanocrystalline structure, and a grain boundary phase around the main phase, and the rare-earth magnet being adapted to be formed by applying hot deformation processing to the sintered body for imparting anisotropy thereto and further diffusing an alloy for improving coercivity therein,
wherein each of the crystal grains that form the sintered body has a planar shape that is, when viewed from a direction perpendicular to an easy direction of magnetization (i.e., a c-axis direction), a rectangle having sides in the c-axis direction and sides in a direction (i.e., an a-axis direction) that is perpendicular to the c-axis direction, or a shape that is close to the rectangle. |
地址 |
Susono-shi JP |