Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Fabrication of the (Alnico, Sm-Co) Bonded Magnet and its Magnetic Properties

(알니코, 사마리움-코발트) 본드자석의 제조 및 자기적 특성연구

  • Kim, Jung-Sik (Department of Materials Science and Engineering, The University of Seoul)
  • 김정식 (서울시립대학교 신소재공학과)
  • Received : 2010.10.04
  • Accepted : 2010.11.16
  • Published : 2010.12.01
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Abstract

In this study the (Alnico, Sm-Co) bonded magnets were fabricated by mixing the Sm-Co added alnico alloy powders with epoxy resin and binder, appropriately. Also, the hybrid ring magnets of (Alnico, Sm-Co)/Sr-ferrite were fabricated by coupling the Sr-ferrite composite layer with an (Alnico, Sm-Co) magnet. The magnetic properties of (Alnico, Sm-Co) ring magnets were varied with the amount of Sm-Co powders. The addition of Sm-Co powders increased a remanent induction($B_r$) and coercive force($_BH_C$), while decreasing a surface flux density and repulsive distance. The surface flux density and repulsive distance for the (Alnico, Sm-Co) ring magnet increased with a magnetizing voltage up to about 160 V and reached an apparent saturation point. Also, the measurements of temperature and moisture characteristics showed that the surface flux densities of N-S poles and repulsive distance decreased a little within 4% after 10 days passed.

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References

  1. R. A. McCurrie, Handbook of Ferromagnetic Materials 3, 107 (1982).
  2. T. Mishima, Ohm 19, 353 (1932).
  3. D. Oliver and J. Shedden, Nature 142, 209 (1938).
  4. Rolin J. Parker, Advances in Permanent Magnetism, John Wiley & Sons Inc., New York, 1990.
  5. W. Schafer, E. Jansen, W. Kockelmann, A. Alker, A. Kirfel, D. Seitz, and M. Gronefeld, Physica B: Condensed Matter 276-278, 866 (2000). https://doi.org/10.1016/S0921-4526(99)01538-0
  6. X. Li, A. Chiba, M. Sato, and S. Takahashi, Acta Materialia 51, 5593 (2003). https://doi.org/10.1016/S1359-6454(03)00423-3
  7. M. Hamano, Proc. 6th Int. Conf. on Ferrite, Kyoto, 1992, p.1037.
  8. M. Hamano, J. Alloys and Comp. 222, 8 (1995). https://doi.org/10.1016/0925-8388(94)04903-3
  9. D. Plusa, B. Slusarek, and M. Dospial, J. Alloys and Comp. 423, 81 (2006). https://doi.org/10.1016/j.jallcom.2005.12.051
  10. B. M. Ma, J. W. Herchenroeder, and B. Smith, J. Magn. Magn. Mater. 239, 418 (2002). https://doi.org/10.1016/S0304-8853(01)00609-6
  11. B. Zhang, G. Lu, Y. Feng, J. Xiong, and H. Lu, J. Magn. Magn. Mater. 299, 205 (2006). https://doi.org/10.1016/j.jmmm.2005.04.003
  12. S.-D. Kim and J.-S. Kim, J. Magn. Magn. Mater. 307, 295 (2006). https://doi.org/10.1016/j.jmmm.2006.04.019
  13. Y. D. Shin and J.-T. Song, J. KIEEME 9, 93 (1996).