Crystallization Process of α-Fe/Nd2Fe14B Type Nanocomposite Magnet Alloys

  • M. Yamasaki
  • M. Hamano
  • T. Kobayashi
Conference paper


The crystallization process of α-Fe/Nd2Fe14B type nanocomposite magnet alloys has been studied with the x-ray diffraction method and Mössbauer spectroscopy. Melt-spun alloy ribbons with the compositions of Nd8Fe81Co4Nb0.5B6.5 and Nd9Fe79Co4Nb1.5B6.5 were annealed at 600, 650, 700 and 750 °C for the former, and at 700 °C for the latter, respectively. In the case of Nd8Fe81Co4Nb0.5B6.5, the α-Fe and Nd2Fe14B phases appear in the very early stage of the crystallization process, that is at 650 °C. On the other hand, the alloy of Nd9Fe79Co4Nb1.5B6.5 annealed at 700 °C has fewer α-Fe and more Fe3B phases compared with the case of Nd8Fe81Co4Nb0.5B6.5. Discussions taking notice of the atomic ratio of Fe in the above alloys lead us to the conclusion that α-Fe and Nd2Fe14B are crystallized at comparatively low annealing temperature when the Fe ratio is high in the alloys, while fewer α-Fe and more Fe3B phases appear when the Fe ratio is low.


nanocomposite magnet Mössbauer spectroscopy crystallization process intermediate metastable phase 


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  1. [1]
    A. Inoue, A. Takeuchi, A. Makino and T. Masumoto, Mater. Trans., JIM, 36–5 (1995) 676.Google Scholar
  2. [2]
    Yandong Gao, Shaoqing Zhang and Bocao Liu, J. Magn. Magn. Mater., 208 (2000) 158.ADSCrossRefGoogle Scholar
  3. [4]
    T. KObayashi, M. Yamasaki and M. Hamano, J. Appl. Phys., 87 (2000) 6579.ADSCrossRefGoogle Scholar
  4. [5]
    T. Hinomura, S. Nasu, H. Kanekiyo and S. Hirosawa, J. Japan Inst. Metals, 61 (1997) 184.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2002

Authors and Affiliations

  • M. Yamasaki
    • 1
  • M. Hamano
    • 2
  • T. Kobayashi
    • 3
  1. 1.Toda Kogyo CorporationOtake, HiroshimaJapan
  2. 2.Mikuni-Makino Industrial Co., Ltd.Ashigarakami-gun, KanagawaJapan
  3. 3.Department of PhysicsShiga University of Medical ScienceOtsu, ShigaJapan

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