| 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. |
