Thermodynamic study of magnetic field-enhanced nanocrystallisation in amorphous Fe-Si-B(-Nb-Cu)

Victoria A. Yardley, Sadahiro Tsurekawa, Hiromichi Fujii, Takashi Matsuzaki

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Recent work has shown that annealing amorphous alloys under an applied magnetic field can enhance the fraction of nanocrystalline phase formed and induce a strong texture. This effect has been attributed to the displacement of thermodynamic equilibrium by the energetic contribution from the applied field. In the present paper, an attempt is made to test the validity of this proposition in the Fe-Si-B(-Nb-Cu) system using equilibrium calculations in the framework of the CALPHAD (CALculation of PHAse Diagrams) methodology and a simple estimate of the energy supplied by the field. However, it is found that the magnetic energy term thus obtained is too small to produce the observed change in nanocrystalline phase fraction. Possible reasons for this discrepancy are discussed.

Original languageEnglish
Pages (from-to)2826-2832
Number of pages7
JournalMaterials Transactions
Volume48
Issue number11
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • Amorphous alloy
  • Calculation of phase diagrams (CALPHAD)
  • Iron-silicon-boron
  • Magnetic field processing
  • Nanocrystal
  • Thermodynamics

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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