| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive permanent magnet alloy having improved heat resistance even when it is used at a temperature as high as 200°C. <P>SOLUTION: A permanent magnet alloy has the improved heat resistance comprising, in terms of % by atom, 0.1 to 15 at.% (preferably, 1 to 10at.%) C, 0.5 to 15 at.% B, provided that C and B in total account for 2 to 30 at.%; 40 at.% or less Co (exclusive of 0%), 0.5 to 5 at.% in total of Dy and Tb, 8 to 20 at.% R, wherein R represents at least one element selected from the group composed of Nd, Pr, Ce, La, Y, Gd, Ho, Er, and Tm (the addition of Nd alone or a combination of Nd with Pr is most preferred); with the balance being Fe and unavoidable impurities. <P>COPYRIGHT: (C)2008,JPO&INPIT |
