Unusual complex high temperature structure of Fe2VSi

O. Nashima, Y. Yamaguchi, H. Higashi, T. Goto, T. Kaneko, S. Sasamori, H. Kimura, K. Kobayashi, R. Kainuma, K. Ishida, T. Kanomata

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The α-Mn structure (A12) has been found above 1373 K as a new structure of Fe2VSi, which has the Heusler structure (L21) at room temperature. The Fe2VSi alloy with a single phase of the α-Mn structure was produced using the melt-quenching technique. When the sample was annealed at 1073 K, it transformed into the Heusler structure. In the next step, the Heusler Fe2VSi was annealed again at 1373 K and quenched into ice water, then the sample almost returned to the α-Mn structure. Detail of the crystal structure was investigated on the α-Mn phase by the neutron diffraction measurement. The high temperature α-Mn phase has more complex structure than the low temperature Heusler phase, and it is very unusual transformation because usually a high temperature phase has a simpler structure than its low temperature phase.

Original languageEnglish
Pages (from-to)150-154
Number of pages5
JournalJournal of Alloys and Compounds
Volume417
Issue number1-2
DOIs
Publication statusPublished - 2006 Jun 29

Keywords

  • Crystal structure and symmetry
  • Crystal structure change
  • Heusler alloy
  • X-ray and neutron diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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