Journal of Magnetics

  • 제18권4호
  • /
  • Pages.400-404
  • /
  • 2013
  • /
  • 1226-1750(pISSN)
  • /
  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
권호 표지
DOI QR코드

DOI QR Code

Coercivity Enhancement of Sintered Nd-Fe-B Magnets by Grain Boundary Diffusion with DyH3 Nanoparticles

  • Liu, W.Q. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Chang, C. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Yue, M. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Yang, J.S. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Zhang, D.T. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Liu, Y.Q. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Zhang, J.X. (College of Materials Science and Engineering, Beijing University of Technology) ;
  • Yi, X.F. (Anhui Earth-panda Advance Magnetic Material co., Ltd.) ;
  • Chen, J.W. (Anhui Earth-panda Advance Magnetic Material co., Ltd.)
  • 투고 : 2013.07.24
  • 심사 : 2013.09.27
  • 발행 : 2013.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Grain boundary diffusion technique with $DyH_3$ nanoparticles was applied to fabricate Dy-less sintered Nd-Fe-B permanent magnets with high coercivity. The magnetic properties and microstructure of magnets were systematically studied. The coercivity and remanence of grain boundary diffusion magnet were improved by 60% and reduced by 7% compared with those of the original magnet, respectively. Meanwhile, both the remanence temperature coefficient (${\alpha}$) and the coercivity temperature coefficient (${\beta}$) of the magnets were improved after diffusion treatment. Investigation shows that Dy is preferentially enriched as (Nd, Dy)$_2Fe_{14}B$ phase in the surface region of the $Nd_2Fe_{14}B$ matrix grains indicated by the remarkable enhancement of the magneto-crystalline anisotropy field of the magnet. As a result, the magnet diffused with a small amount of Dy nanoparticles possesses enhanced coercivity without remarkably sacrificing its magnetization.

키워드

참고문헌

  1. M. Sagawa, S. Fujimura, N. Togawa, and Y. Matsuura, J. Appl. Phys. 55, 2083 (1984). https://doi.org/10.1063/1.333572
  2. N. C. Koon, B. N. Das, M. Rubinstein, and J. Tyson, J. Appl. Phys. 57, 4091 (1985). https://doi.org/10.1063/1.334681
  3. S. Hirosawa, Y. Matsuura, H. Yamamoto, and S. Fujimura, J. Appl. Phys. 59, 873 (1986). https://doi.org/10.1063/1.336611
  4. J. J. Croat, F. Herbst, R. W. Lee, and F. E. Pinkerton, J. Appl. Phys. 55, 2078 (1984). https://doi.org/10.1063/1.333571
  5. A. S. Lileev, A. G. Ayuyan, W. Steiner, and M. Reissner, J. Magn. Magn. Mater. 157, 373 (1996).
  6. M. Sagawa, S. Fujimura, H. Yamamoto, and K. Hiraga, IEEE Trans. Magn. 20, 1584 (1984). https://doi.org/10.1109/TMAG.1984.1063214
  7. M. Komuro, Y. Satsu, and H. Suzuki, IEEE Trans. Magn. 46, 3831 (2010). https://doi.org/10.1109/TMAG.2010.2064780
  8. K. Hirota, H. Nakamura, T. Minowa, and M. Honshima, IEEE Trans. Magn. 42, 2009 (2006). https://doi.org/10.1109/TMAG.2006.877712
  9. H. Suzuki, Y. Satsu, T. Kohashi, K. Motai, and M. Komuro, J. Appl. Phys. 109, 07A746 (2011). https://doi.org/10.1063/1.3565407
  10. H. Kronmuller, Phys. Status Solidi B 144, 385 (1987). https://doi.org/10.1002/pssb.2221440134

피인용 문헌

  1. Waste Nd-Fe-B Sintered Magnet Recycling by Doping With Rare Earth Rich Alloys vol.50, pp.12, 2014, https://doi.org/10.1109/TMAG.2014.2329457