| 摘要 |
<p>A rare earth permanent magnet material is prepared by covering a sintered magnet body of R<Sup>1</Sup>-Fe-B composition wherein R<Sup>1</Sup> is a rare earth element, with a powder comprising at least 30% by weight of an alloy of R<Sup>2</Sup><Sub>a</Sub>T<Sub>b</Sub>M<Sub>c</Sub>A<Sub>d</Sub>H<Sub>e</Sub> wherein R<Sup>2</Sup> is a rare earth element, T is Fe and/or Co, and M is Al, Cu or the like, and having an average particle size up to 100 µm, and heat treating the powder-covered magnet body at a suitable temperature, for causing R<Sup>2</Sup>, T, M and A in the powder to be absorbed in the magnet body.</p> |
