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
AbstractTo 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.
|Journal series||Physical Review B, ISSN 1098-0121, (A 35 pkt)|
|Publication size in sheets||0.3|
|Score|| = 35.0, 05-09-2019, ArticleFromJournal|
= 35.0, 05-09-2019, ArticleFromJournal
|Publication indicators||= 6; = 6; : 2016 = 1.151; : 2014 = 3.736 (2) - 2014=3.583 (5)|
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