Sm2Co17 based permanent magnet material has high Curie temperature, superior comprehensive magnetic performance and good environmental stability. It has important applications in new fighters, drones, radar systems, military satellites, space exploration, etc. Sm2Co17-based permanent magnet materials are listed as one of the key research objects in the field of materials.
China has been developing samarium-cobalt permanent magnet materials in the 1970s, and it has been nearly forty years old. After years of development, Sm2Co17-based permanent magnet materials have successively formed three series of materials with high magnetic energy product, low remanence temperature coefficient and high service temperature.
A lot of research work has been done in these fields at home and abroad. In this paper, the research progress of samarium cobalt permanent magnet materials is reviewed from the aspects of high performance, low temperature coefficient and high temperature samarium cobalt permanent magnet materials. The research status of microstructure and coercivity of samarium cobalt permanent magnet materials is summarized, and Sm2Co17 is studied. The development direction of basic permanent magnet materials is expected.
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