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

Przemysław Dzięgielewski , Jerzy Antonowicz , Anna Pietnoczka , O. Mathon , S. Pascarelli , I. Kantor , T. Shinmei , T. Irifune

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.
Author Przemysław Dzięgielewski (FP / SD)
Przemysław Dzięgielewski,,
- Semiconductors Division
, Jerzy Antonowicz (FP / SD)
Jerzy Antonowicz,,
- Semiconductors Division
, Anna Pietnoczka (FP / SD)
Anna Pietnoczka,,
- Semiconductors Division
, O. Mathon - [European Synchrotron Radiation Facility]
O. Mathon,,
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, S. Pascarelli - [European Synchrotron Radiation Facility]
S. Pascarelli,,
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, I. Kantor - [Danmarks Tekniske Universitet]
I. Kantor,,
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, T. Shinmei - [Ehime University]
T. Shinmei,,
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, T. Irifune - [Ehime University]
T. Irifune,,
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Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388, (A 35 pkt)
Issue year2018
Vol757
Pages484-488
Publication size in sheets0.5
Keywords in EnglishExtended X-ray absorption fine structure (EXAFS) Metallic glass Crystallization High pressure
ASJC Classification2505 Materials Chemistry; 2506 Metals and Alloys; 2210 Mechanical Engineering; 2211 Mechanics of Materials
DOIDOI:10.1016/j.jallcom.2018.05.077
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 13-08-2019, ArticleFromJournal
Publication indicators WoS Citations = 1; Scopus Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.321; WoS Impact Factor: 2017 = 3.779 (2) - 2017=3.315 (5)
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