Pressure-induced transformations in Ce-Al metallic glasses: The role of stiffness of interatomic pairs

P. Dziegielewski, J. Antonowicz*, A. Pietnoczka, O. Mathon, S. Pascarelli, I. Kantor, T. Shinmei, T. Irifune

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

When high pressure is applied to Ce-Al metallic glasses, their disordered atomic structure exhibits some unusual properties like polyamorphism or transformation into a crystalline phase. In this work, we probe the atomic arrangement of Ce55Al45 and Ce75Al25 glasses by X-ray absorption spectroscopy and X-ray diffraction in the pressure range of 0–30 GPa. The pressure-dependent parameters of local environment of cerium atoms are evaluated by extended X-ray absorption fine structure (EXAFS) fitting. We demonstrate that due to compositional dependence of stiffness of Ce-Al pairs, densification of Ce55Al45 is accompanied by an increase of atomic size mismatch between Ce and Al stabilizing the amorphous phase, while a decrease of the mismatch is observed in Ce75Al25 alloy which eventually leads to its devitrification at 25 GPa.
Original languageEnglish
JournalJournal of Alloys and Compounds
Volume757
Pages (from-to)484-488
ISSN0925-8388
DOIs
Publication statusPublished - 2018

Keywords

  • Extended X-ray absorption fine structure
  • (EXAFS)
  • Metallic glass
  • Crystallization
  • High pressure

Cite this

Dziegielewski, P. ; Antonowicz, J. ; Pietnoczka, A. ; Mathon, O. ; Pascarelli, S. ; Kantor, I. ; Shinmei, T. ; Irifune, T. / Pressure-induced transformations in Ce-Al metallic glasses: The role of stiffness of interatomic pairs. In: Journal of Alloys and Compounds. 2018 ; Vol. 757. pp. 484-488.
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abstract = "When high pressure is applied to Ce-Al metallic glasses, their disordered atomic structure exhibits some unusual properties like polyamorphism or transformation into a crystalline phase. In this work, we probe the atomic arrangement of Ce55Al45 and Ce75Al25 glasses by X-ray absorption spectroscopy and X-ray diffraction in the pressure range of 0–30 GPa. The pressure-dependent parameters of local environment of cerium atoms are evaluated by extended X-ray absorption fine structure (EXAFS) fitting. We demonstrate that due to compositional dependence of stiffness of Ce-Al pairs, densification of Ce55Al45 is accompanied by an increase of atomic size mismatch between Ce and Al stabilizing the amorphous phase, while a decrease of the mismatch is observed in Ce75Al25 alloy which eventually leads to its devitrification at 25 GPa.",
keywords = "Extended X-ray absorption fine structure, (EXAFS), Metallic glass, Crystallization, High pressure",
author = "P. Dziegielewski and J. Antonowicz and A. Pietnoczka and O. Mathon and S. Pascarelli and I. Kantor and T. Shinmei and T. Irifune",
year = "2018",
doi = "10.1016/j.jallcom.2018.05.077",
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journal = "Journal of Alloys and Compounds",
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Dziegielewski, P, Antonowicz, J, Pietnoczka, A, Mathon, O, Pascarelli, S, Kantor, I, Shinmei, T & Irifune, T 2018, 'Pressure-induced transformations in Ce-Al metallic glasses: The role of stiffness of interatomic pairs', Journal of Alloys and Compounds, vol. 757, pp. 484-488. https://doi.org/10.1016/j.jallcom.2018.05.077

Pressure-induced transformations in Ce-Al metallic glasses: The role of stiffness of interatomic pairs. / Dziegielewski, P.; Antonowicz, J.; Pietnoczka, A.; Mathon, O.; Pascarelli, S.; Kantor, I.; Shinmei, T.; Irifune, T.

In: Journal of Alloys and Compounds, Vol. 757, 2018, p. 484-488.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Pressure-induced transformations in Ce-Al metallic glasses: The role of stiffness of interatomic pairs

AU - Dziegielewski, P.

AU - Antonowicz, J.

AU - Pietnoczka, A.

AU - Mathon, O.

AU - Pascarelli, S.

AU - Kantor, I.

AU - Shinmei, T.

AU - Irifune, T.

PY - 2018

Y1 - 2018

N2 - When high pressure is applied to Ce-Al metallic glasses, their disordered atomic structure exhibits some unusual properties like polyamorphism or transformation into a crystalline phase. In this work, we probe the atomic arrangement of Ce55Al45 and Ce75Al25 glasses by X-ray absorption spectroscopy and X-ray diffraction in the pressure range of 0–30 GPa. The pressure-dependent parameters of local environment of cerium atoms are evaluated by extended X-ray absorption fine structure (EXAFS) fitting. We demonstrate that due to compositional dependence of stiffness of Ce-Al pairs, densification of Ce55Al45 is accompanied by an increase of atomic size mismatch between Ce and Al stabilizing the amorphous phase, while a decrease of the mismatch is observed in Ce75Al25 alloy which eventually leads to its devitrification at 25 GPa.

AB - When high pressure is applied to Ce-Al metallic glasses, their disordered atomic structure exhibits some unusual properties like polyamorphism or transformation into a crystalline phase. In this work, we probe the atomic arrangement of Ce55Al45 and Ce75Al25 glasses by X-ray absorption spectroscopy and X-ray diffraction in the pressure range of 0–30 GPa. The pressure-dependent parameters of local environment of cerium atoms are evaluated by extended X-ray absorption fine structure (EXAFS) fitting. We demonstrate that due to compositional dependence of stiffness of Ce-Al pairs, densification of Ce55Al45 is accompanied by an increase of atomic size mismatch between Ce and Al stabilizing the amorphous phase, while a decrease of the mismatch is observed in Ce75Al25 alloy which eventually leads to its devitrification at 25 GPa.

KW - Extended X-ray absorption fine structure

KW - (EXAFS)

KW - Metallic glass

KW - Crystallization

KW - High pressure

U2 - 10.1016/j.jallcom.2018.05.077

DO - 10.1016/j.jallcom.2018.05.077

M3 - Journal article

VL - 757

SP - 484

EP - 488

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -