Production of (Sm,Zr)(Fe,Co)(3) magnets

This study was aimed at the improvement of SmFe(3)-based alloys prepared by means of melt-spinning. A systematic study was carried out on (Sm(1-x)Zr(x))(Fe(0.75)Co(0.25))(3) (x = 0–0.4) alloys melt-spun at a wheel speed of 50 m/s and annealed at 773–1173 K. SmFe(3)-based melt-spun ribbons with a rhombohedral structure were prepared from the (Sm(1-x)Zr(x)) (Fe(0.75)Co(0.25))(3) (x = 0–0.4) alloys. The addition of zirconium increased the coercivity and enhanced the remanence of the melt-spun ribbons. However, the Curie temperature slightly decreased with increasing zirconium content. The optimally annealed alloys, with a composition of (Sm(0.7)Zr(0.3)) (Fe(0.75)Co(0.25))(3), achieved a coercivity of 7.8 kOe, a remanence of 6.0 kG, and a Curie temperature of 680K.