| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an R-T-B alloy which can be a raw material for a rare-earth permanent magnet having excellent magnetic characteristics. <P>SOLUTION: The R-T-B alloy contains at least Dy (wherein R represents at least one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb and Lu; T represents a transition metal containing not less than 80% by mass of Fe; and B represents a compound containing not less than 50% by mass of B and not less than 0% by mass but less than 50% by mass of at least one of C and N). This R-T-B alloy has a main phase such as an R<SB>2</SB>T<SB>14</SB>B phase for exhibiting magnetism, an R-rich phase wherein R is concentrated when compared with the composition ratio of the alloy as a whole, and a Dy concentrated region formed near the R-rich phase in which region Dy is concentrated when compared with the composition ratio of the alloy as a whole. <P>COPYRIGHT: (C)2008,JPO&INPIT |
