Rare-Earth-Free Permanent Magnets for Electrical Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn-Bi and M-type Hexaferrite

Hong, Yang-Ki¹  Haskew, Timothy¹  Myryasov, Oleg¹  Jin, Sungho²  Berkowitz, Ami² 

[1] University of Alabama;University of California San Diego

关键词: Exchange coupling;    core-shell;    rare-earth-free;    permanent magnet;    Mn-Bi;    M-type hexaferrite;   

DOI  :  10.2172/1133257
RP-ID  :  DOE-ALABAMA-0000189
PID  :  OSTI ID: 1133257

美国|英语

来源: SciTech Connect

【 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, etc.