Development of Heavy Rare-earth-less Hot-deformed Nd-Fe-B Magnet

Abstract

The hot-deformed Nd-Fe-B magnets are known to have a fine microstructure due to their unique fabrication procedure. It is well known that coercivity increases with decreasing grain size of a hard magnetic material. Therefore, a hot-deformed magnet can possess good magnetic properties without being composed of heavy rare-earth elements such as Dy and Tb. In this paper, we present the characteristics of hot-deformed magnets of a newly developed material in detail.