Research on Preparation of Sm-Fe-N Anisotropic Magnetic Powder by Nitriding Melt-Spun Sm2Fe17 Fine Columnar Crystals

The Sm 2 Fe 17 fine columnar crystals ribbon was obtained by melt-spinning at 6m/s surface rotating velocity of Cu wheel and in suitable thickness of ribbon.Preparation process of its nitride powder was primarily explored by means of XRD, SEM and the measurement of magnetic properties.The columnar crystal texture of Sm 2 Fe 17 in the ribbon is very beneficial to increase magnetic anisotropy of its nitride Sm-Fe-N powder prepared through powder metallurgy process.