Magnetic properties of Sm-Fe-N bulk magnets prepared from Sm₂Fe₁₇N₃ melt-spun ribbons Available to Purchase

Sm-Fe-N bulk magnets were prepared from Sm₂Fe₁₇N₃ melt-spun ribbon using the spark plasma sintering method. The bulk materials thus obtained had high densities of 90%–94%. The Sm-Fe-N bulk magnets produced at 723 K or lower retained the Sm₂Fe₁₇N₃ phase of the melt-spun ribbon and exhibited a high coercivity. In contrast, the Sm₂Fe₁₇N₃ phase decomposed during sintering at 773 K or higher, resulting in Sm-Fe-N bulk magnets with a lower coercivity. The Sm-Fe-N bulk magnets prepared from the Sm₂Fe₁₇N₃ melt-spun ribbons sintered at 673 K exhibited an attractively high coercivity of 16.9 kOe with a remanence of 94.4 emu/g.