Perkins Coie LLP
Low-cost double-main-phase Ce permanent magnet alloy and its preparation method
The invention discloses a low-cost double-main-phase Ce permanent magnet alloy and its preparation method, and belongs to technical field of rare earth permanent magnet material. The Ce permanent magnet alloy has a chemical formula of (Cex,Re1-x)aFe100-a-b-cBbTMc in mass percent, wherein 0.4≦x≦0.8, 29≦a≦33, 0.8≦b≦1.5, 0.5≦c≦2, Re is one or more selected from Nd, Pr, Dy, Tb and Ho elements, and TM is one or more selected from Ga, Co, Cu, Nb and Al elements; the Ce permanent magnet alloy has a double-main-phase structure with a low HA phase in (Ce,Re)—Fe—B and a high HA phase in Nd—Fe—B. The double-main-phase Ce permanent magnet alloy of the present invention prepared by using a double-main-phase alloy method greatly lowers the production cost of magnet while maintaining excellent magnetic performances.
CENTRAL IRON AND STEEL RESEARCH INSTITUTE
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Jingdai Wei Yanfeng Haibo Yachao Minggang Anhua Shulin
Wang Li Li Feng Sun Zhu Li Huang