Final Scientific/Technical Report, Rare-Earth-Free Permanent Magnets for Electrical Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn-Bi and M-Type Hexaferrite, January 1, 2012-September 30, 2013.

Johnson, M. ; Hong, Y. K. ; Joiner, L.

Technical Information Center Oak Ridge Tennessee

关键词: Magnetic materials;    Rare earth alloys;    Permanent magnets;    Anisotropy;    Electrical equipment;   

RP-ID  :  DE141133257

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The research we conducted focuses on the rare-earth (RE)-free permanent magnet by modeling, simulating, and synthesizing exchange coupled two-phase (hard/soft) RE-free core-shell nano-structured magnet. The RE-free magnets are made of magnetically hard core materials (high anisotropy materials including Mn-Bi-X and M-type hexaferrite) coated by soft shell materials (high magnetization materials including Fe-Co or Co). Therefore, our research helps understand the exchange coupling conditions of the core/shell magnets, interface exchange behavior between core and shell materials, formation mechanism of core/shell structures, stability conditions of core and shell materials.