Nd-Fe-B type anisotropic exchange spring magnet and method of producing the same

摘要

A Nd-Fe-B type anisotropic exchange spring magnet is produced by a method of obtaining powder of a Nd-Fe-B type rare earth magnet alloy which comprises hard magnetic phases and soft magnetic phases wherein a minimum width of the soft magnetic phases is smaller than or equal to 1 mum and a minimum distance between the soft magnetic phases is greater than or equal to 0.1 mum, obtaining a compressed powder body by compressing the powder, and obtaining the Nd-Fe-B type anisotropic exchange spring magnet by sintering the compressed powder body using a discharge plasma sintering unit.