Division of Functional Materials, Central Iron & Steel Research Institute Group
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DOI:
10.7502/j.issn.1674-3962.2015.11.01
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Abstract:
Due to the high Curie temperature, superior magnetic properties and good environmental stability, Sm2Co17-based permanent magnet materials have been widely used in novel aircraft, drones, radar systems, military satellites, and space exploration applications. Western developed countries list Sm2Co17-based permanent magnet materials as one of the most important materials which should be researched. The development of samarium cobalt permanent magnetic materials has been nearly 40 years, and Sm2Co17-based permanent magnets have been developed as high maximum-energy-product, low remanence- temperature-coefficient and high-temperature materials for three series. In this paper, based on the high performance, low temperature coefficient and high temperature application, the researches and developments of samarium cobalt permanent magnetic materials were summarized, and coercivity mechanism of Sm2Co17- based permanent magnetic materials was discussed. Finally, the development prospects of this type of permanent magnets were presented.