| 简介 |
A rare-earth sintered magnet including a relatively large main phase, and method for manufacturing same. The rare-earth sintered magnet having excellent coercive-force performance that can be manufactured without using heavy rare-earth elements such as Dy, and including : a RE-T-B main phase C (RE : Nd or Pr, T : Fe or Fe and a part thereof substituted with Co), and a grain boundary phase B surrounding the main phase C, the grain boundary phase including the RE element and the T element. The T element at the grain boundary phase B has density of 60 at % or less, and the grain boundary B has a thickness decreasing from a surface S of the rare-earth sintered magnet M to an inside thereof, and the grain boundary phase B at an area SA of a surface layer of the rare-earth sintered magnet M has an average thickness of 10 nm or more. |
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