SmFe9 alloy was prepared by melting quenching method.The influence of the mass fraction of Sm during melting and the speed of copper roller during rapid quenching on the preparation of single phase SmFe9 alloy was studied through analysis of alloy phase composition and surface morphology.The influence of Ti,Co,and V doping on the thermal stability of SmFe9 alloy was also investigated.The results showed that reducing the Sm content and increasing the quenching speed were favorable to forming the SmFe9 alloy,and SmFe9 alloy with a single phase could be prepared when the content of Sm was about 22.3 wt％and the quenching speed was above 51.84 m/s.In terms of element doping,compared with Co and V,Ti had a positive effect on improving the thermal stability of SmFe9 alloy.Its addition could reduce the decomposition of SmFe9 alloy at high temperatures and inhibit the precipitation of α-Fe.
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