Magnetic Properties Of Sm-Fe-N Prepared By Melt-Spun In Liquid N-2 And High Gas Pressure Nitrogenation

Sm-Fe-N was prepared by melt-spun Sm-Fe with liquid-N-2-cooled copper wheel and nitrogen absorption under N-2 gas pressures up to 25 MPa. The structure and magnetic properties of Sm-Fe-N prepared under varied temperatures, N-2 pressures and nitrogen absorption time have been investigated systematically. The liquid N-2 melt-spun process improves the homogeneity of the samples while the high N-2 pressure increases the efficiency of the nitrogenation process. The Sin-Fe-N decomposes under 25 MPa N-2 at temperatures above 743 K.