| 简介 |
PROBLEM TO BE SOLVED : To provide a rare-earth magnet excellent in high temperature coercive force, while reducing the amount of Nd.
SOLUTION : A crystal grain 10 having a whole composition of (CexNd(1-x))yFe(100-y-w-z-v)CowBzMv(in the formula, M is at least one kind of Ga, Al, Cu, Au, Ag, Zn, In, Mn, 0≤x≤0.75, 5≤y≤20, 4≤z≤6.5, 0≤w≤8, 0≤v≤2) is constituted of a core 1 and a shell 2 therearound, The Nd concentration is higher in the shell 2 than in the core 1.
SELECTED DRAWING : Figure 1
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