| 简介 |
PROBLEM TO BE SOLVED : To provide a R-T-B-based rare earth permanent magnet that can provide a high coercive force (Hcj) without enhancing the Dy concentration in R-T-B-based alloy and can suppress the decline in magnetization (Br) caused by addition of Dy so as to provide an excellent magnetic characteristic.
SOLUTION : A R-T-B-based rare earth permanent magnet comprises a sintered body having a main phase including mainly R2Fe14B, and a grain boundary phase including more R than the main phase, and R represents a rare earth element including Nd and Dy as the essential element, and the grain boundary phase includes a first grain boundary phase and a second grain boundary phase with different Dy atom concentrations.
COPYRIGHT : (C)2012, JPO&INPIT |
客服热线：
手机版
二维码
