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

被引：15

作者：

Antonowicz, J. ^{[1
]}

Pietnoczka, A. ^{[1
]}

Evangelakis, G. A. ^{[2
]}

Mathon, O. ^{[3
]}

Kantor, I. ^{[3
,6
]}

Pascarelli, S. ^{[3
]}

Kartouzian, A. ^{[4
]}

Shinmei, T. ^{[5
]}

Irifune, T. ^{[5
]}

机构：

[1] Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland

[2] Univ Ioannina, Dept Phys, POB 1186, GR-45110 Ioannina, Greece

[3] European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France

[4] Tech Univ Munich, Catalysis Res Ctr, Dept Chem, Lichtenbergstr 4, D-85748 Garching, Germany

[5] Ehime Univ, Geodynam Res Ctr, 2-5 Bunkyo Cho, Matsuyama, Ehime 7908577, Japan

[6] Tech Univ Denmark, Fysikvej 307, DK-2800 Lyngby, Denmark

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 14期

关键词：

POLYCRYSTALLINE DIAMOND; ORDER; EXAFS;

D O I：

10.1103/PhysRevB.93.144115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：5

共 33 条

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