Paper Title:
Modelling the Crystallization Reactions of Amorphous Precursors in Fe3B/Nd2Fe14B Nanocomposite Magnets
  Abstract

A physically-based model is proposed for the competitive precipitation of multiple phases (bcc-Fe, Fe3B, Nd2Fe14B, Nd2Fe23B3, NdFe4B4 and Fe2B) from an amorphous Fe-B-Nd matrix. These materials form the basis of a class of nanocomposite hard magnets. The nucleation and growth of the different phases are calculated using computational thermodynamics and kinetics tools with input from a thermodynamic assessment of this system. In some alloy compositions, the phase formation sequence during crystallization shows significant sensitivity to the heating-rate. Model calculations illustrate that this effect cannot be explained by homogeneous nucleation and growth of the phases. The possible role of heterogeneous nucleation is briefly discussed.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1166-1169
DOI
10.4028/www.scientific.net/MSF.654-656.1166
Citation
V. Ly, S. Gorsse, K. Suzuki, C. R. Hutchinson, "Modelling the Crystallization Reactions of Amorphous Precursors in Fe3B/Nd2Fe14B Nanocomposite Magnets", Materials Science Forum, Vols. 654-656, pp. 1166-1169, 2010
Online since
June 2010
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$32.00
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