Sm-Fe-N BASED RARE EARTH MAGNET

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PROBLEM TO BE SOLVED : To provide a Sm-Fe-N based rare earth magnet with high magnetic characteristics and high relative density. SOLUTION : The Sm-Fe-N based rare earth magnet with relative density of greater than or equal to 90% includes : a Sm2Fe17N3 phase, which is a main phase; and a SmFe3Nx phase (1.0≤x≤2.5), which is a sub-phase with a cross-sectional area ratio of less than or equal to 5% (excluding 0). When x is in this range, The SmFe3Nx phase can be stably present and can exert a function as an oxidation suppression phase. SELECTED DRAWING : None COPYRIGHT : (C)2017, JPO&INPIT