| 简介 |
The present invention relates to a rare-earth sintered magnet having a relatively large principal phase, and a method for manufacturing said magnet, and provides a rare-earth sintered magnet of exceptional coercivity manufactured without using a heavy rare-earth element such as Dy, and a method for manufacturing said magnet. A rare-earth sintered magnet (M) comprising a RE-T-B principal phase (C) (where RE is Nd or Pr, and T is Fe or Fe partially substituted by Co), and a grain boundary phase (B) that surrounds the principal phase (C) and includes an RE element and a T element, wherein the T element concentration in the grain boundary phase (B) is 60 at% or less, the thickness of the grain boundary phase (B) is reduced further to the inside than the outer surface (S) of the rare-earth sintered magnet (M), and the average thickness of the grain boundary phase (B) in a region (SA) of the outer layer of the rare-earth sintered magnet (M) is 10 nm or more. |
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