Presentation Information
[P2-40]Study on the reduction of high-temperature flux loss in Sm2Co17 permanent magnets
*Bo Zhou1, Lei Liu1,2, Yong Ding1,2, Yingli Sun1,2, Aru Yan1,2 (1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (China), 2. University of Chinese Academy of Sciences (China))
Keywords:
Sm2Co17 permanent magnets,high-temperature flux loss,grain boundary,cellular nanostructure,heat treatment
Sm2Co17 permanent magnets have a high magnetic energy product, as well as a high Curie temperature and good temperature stability, making it attractive for applications in high-temperature fields. Currently, researches on heat-resistant Sm2Co17 magnets have been focused on increasing the operating temperature and improving the high-temperature magnetic properties, while lacking a full understanding of microstructure changes and flux loss evolution after a long-term high-temperature service. With the development of high-tech fields such as aerospace, magnetic devices have put forward higher requirements for thermal stability of permanent magnets. In this regard, this study systematically analyzes the influence of cellular nanostructures (within grains and around grain boundaries) on high-temperature flux loss in Sm2Co17 magnets, in order to elucidate the main factors affecting flux loss. Meanwhile, the microstructure changes after high-temperature service are characterized as well. Based on these understandings, the high-temperature flux loss is reduced by optimizing the heat treatment process and Cu powder doping in Sm2Co17 permanent magnets.
