| 简介 |
PROBLEM TO BE SOLVED : To provide a rare earth magnet superior in magnetic property, and a method for manufacturing the rare earth magnet. SOLUTION : A rare earth magnet comprises Sm, Fe and N and as an additive element, Me, provided that Me is an element of which the atom radius is 120-140% of an atom radius of Fe, the hydrogen solid solubility at 500-600°C is larger than that of Fe and smaller than that of La. The rare earth magnet has a nanocomposite organization including an Fe phase, a SmFeN phase and a MeFe phase. The SmFeN phase includes, of a Sm2Fe17 Nx phase and a SmFe9 Ny phase, at least the Sm2Fe17 Nx phase. In the organization, the volume ratio of the SmFe9 Ny phase is 65 vol.% or less. When "A" is an atomic ratio of a Me content to a total amount of Sm, Fe and Me, and "B" is an atomic ratio of Fe in the MeFe phase, the product of "A" and "B" is 0.0006-0.034. SELECTED DRAWING : Figure 3 COPYRIGHT : (C)2017, JPO&INPIT |
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