Atomic-level mechanism of elastic deformation in the Zr-Cu metallic glass

Jerzy Antonowicz , Anna Pietnoczka , G.a. Evangelakis , O. Mathon , I. Kantor , S. Pascarelli , Aras Kartouzian , T. Shinmei , T. Irifune

Abstract

To explore the microscopic response of a metallic glass (MG) to an applied hydrostatic load we performed a high-pressure extended x-ray absorption fine structure (EXAFS) study of the Zr66.7Cu33.3 amorphous alloy. EXAFS fitting revealed that on compression, Zr-Zr pairs are strained preferentially. Strong Zr-Cu interactions contribute to the stiffness of dominant Cu-centered clusters and the overall compressibility of the MG is mostly determined by the softer bonds between the Zr atoms belonging to the clusters' outer shell. Stress accommodation is accompanied by a variation of bonding preferences, which is consistent with the observed hierarchy of elastic constants of different atomic pairs.
Author Jerzy Antonowicz (FP / SD)
Jerzy Antonowicz,,
- Semiconductors Division
, Anna Pietnoczka (FP / SD)
Anna Pietnoczka,,
- Semiconductors Division
, G.a. Evangelakis - [Panepistimion Ioanninon]
G.a. Evangelakis,,
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, O. Mathon - [European Synchrotron Radiation Facility]
O. Mathon,,
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, I. Kantor - [European Synchrotron Radiation Facility]
I. Kantor,,
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, S. Pascarelli - [European Synchrotron Radiation Facility]
S. Pascarelli,,
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, Aras Kartouzian - [Technical University of Munich]
Aras Kartouzian,,
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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 seriesPhysical Review B, ISSN 1098-0121, (A 35 pkt)
Issue year2016
Vol93
No14
Pages144115-1-5
Publication size in sheets0.3
ASJC Classification3104 Condensed Matter Physics; 2504 Electronic, Optical and Magnetic Materials
DOIDOI:10.1103/PhysRevB.93.144115
URL http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.144115
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 05-09-2019, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 05-09-2019, ArticleFromJournal
Publication indicators WoS Citations = 6; Scopus Citations = 6; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.151; WoS Impact Factor: 2014 = 3.736 (2) - 2014=3.583 (5)
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