핫프레스 및 다이업셋한 미슈레탈-페로보론 영구자석에 관한 연구

Hot-Pressed and Die-Upset Mischmetal-Ferroboron Permanent Magnets

  • 고관영 (영국 Salford 대학교 물리학부 Joule Lab., 울산과학대학 기계학부) ;
  • ;
  • 조성국 (울산대학교 재료공학과) ;
  • 최원정 (세원기술) ;
  • 김상길 (경신기계공업(주) 충남대학교 기계공학과 대학원)
  • ;
  • H. J. Al-Kanani ;
  • ;
  • ;
  • 발행 : 2001.02.01

초록

The magnetic and metallurgical characteristics of Mischmetal(MM) -Ferroboron (FeB) Permanent magnets have been investigated by X-ray diffractometer, scanning and transmission electron microscope and vibrating sample magnetometer under hot-pressing and die-upsetting process. The best magnetic properties obtained in these studies were $H_c$=5.8 kOe, $B_r$=5.0 kG with $(BH)_{max}=7.6 MGOe for melt-spun ribbons, $H_c$=3.0 kOe, $B_r$=4.6 kG with $(BH)_{max}$=2.9 MGOe for hot-pressed magnets and $H_c$=1.8 kOe, $B_r$=5.5 kG with $(BH)_{max}$=4.1 MGOe for die-upset magnets. The higher magnetic properties in die-upset magnets were resulted from alignment of the c-axis along the die-upsetting direction.

키워드

참고문헌

  1. Rep. Prog. Phys. v.54 K. H. J. Buschow
  2. J. Magn. Magn. Mater. v.44 S. Sinnema;R. J. Radwauski;J. J. M. France;D.B. Mooji;K. H. J. Buschow
  3. Japan IEE meeting on Magn. v.101 J. Yamasaki;H. Soeda;M. Yanagida;K. Mohri
  4. IEEE Trans. Magn. v.22 J. Yamasaki;H. Soeda;M. Yanagida;K. Mohri;N. Teshima;O. Kohmoto;T. Yoneyama;N.Yamaguchi
  5. Proc. on 3rd international symposium on phys. of Magn. Mater. v.2 K.Y. Ko;J. G. Booth
  6. 희토류 영구자석 재료와 그 응용 윤석길
  7. 영구자성재료의 개발과 응용기술 김홍구
  8. J. Appl. Phys. v.62 R. K. Mishra
  9. J. Magn. Magn. Mater. v.54-57 R. K. Mishra
  10. J. Appl. Phys. v.56 J. J. Croat;J. F. Herbst;R. W. Lee;F. E. Pinkerton
  11. J. Appl. Phys. v.53 W. Gong;G. C. Hadjipanayis
  12. J. Appl. Phys. v.64 G. B. Clements;J. E. Keem;J. P. Bradley
  13. 페라이트 및 Nd-Fe-B 계 본드자석의 이방성화와 고성능화에 관한 연구 송진태
  14. J. Appl. Phys. v.70 C. D. Fuerst;E. G. Brewer