Wide Variety in Magnetic Properties for Nd-Fe-B Type Permanent Magnets

摘要

1. Nd-Fe-B magnets with Nd2Fel4B phase have been developed and used for many applications. They are sintered, rapidly quenched, HDDR and nano-composite. 2. To manufacture Nd-Fe-B magnets, RQ, STC, Hydrogenation Decrepitation and HDDR technologies have been applied. 3. Grain size of Nd-Fe-B magnets was ranging from 19 n to 4.8 m. 4. It has been difficult to improve (HcJ). However, isotropic Nd-Fe-B RQ'ed flakes with finer grain size showed the lower (HcJ).