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

doi:10.1016/j.jallcom.2005.09.046

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

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	150-154
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	417
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2005.09.046
Publication status	Published - 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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title = "Unusual complex high temperature structure of Fe2VSi",

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.",

keywords = "Crystal structure and symmetry, Crystal structure change, Heusler alloy, X-ray and neutron diffraction",

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

year = "2006",

month = jun,

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doi = "10.1016/j.jallcom.2005.09.046",

language = "English",

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journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Unusual complex high temperature structure of Fe2VSi

AU - Nashima, O.

AU - Yamaguchi, Y.

AU - Higashi, H.

AU - Goto, T.

AU - Kaneko, T.

AU - Sasamori, S.

AU - Kimura, H.

AU - Kobayashi, K.

AU - Kainuma, R.

AU - Ishida, K.

AU - Kanomata, T.

PY - 2006/6/29

Y1 - 2006/6/29

N2 - 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.

AB - 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.

KW - Crystal structure and symmetry

KW - Crystal structure change

KW - Heusler alloy

KW - X-ray and neutron diffraction

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DO - 10.1016/j.jallcom.2005.09.046

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JO - Journal of Alloys and Compounds

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