| Title |
Magnetic Properties of Nd - Fe - B System Permanent Magnet |
| Authors |
정원용(Won Young Jeung); 최승덕(Seung Dueg Choi); 오재현(Jae Hyun Oh); 강일구(Il Koo Kang) |
| Abstract |
Effects of neodymium content, particle size, sintering and heat treatment on magnetic properties of Nd-Fe-B system permanent magnets were investigated. In the study, the best magnetic properties were achieved for the magnets containing 33 wt% Nd in the Nd-Fe-1.3B system. An energy product of up to 37 MGOe has been resulted. The highest coercivity was observed when the average particle size was about 3㎛. When the content of Nd was less than 31 wt%, the coercivity was not exhibited. It was also observed that very little sintering has taken place due to lack of Nd-rich phase with in the Nd-Fe-1.3B system. The absence of coercivity was due to easy nucleation of reverse domains with in the irregular shape of grains in the sintered body. |