Change in atomic coordination in a heavily deformed metallic glass

被引：7

作者：

Liu, Y. ^{[1
,2
]}

Schumacher, G. ^{[2
]}

Riesemeier, H. ^{[3
]}

Banhart, J. ^{[2
,4
]}

机构：

[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, D-14109 Berlin, Germany

[3] Bundesanstalt Mat Forsch & Prufung, D-12205 Berlin, Germany

[4] Tech Univ Berlin, D-10623 Berlin, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 20期

关键词：

X-RAY-DIFFRACTION; SHEAR BANDS; ELECTRON-IRRADIATION; POSITRON LIFETIME; STRUCTURAL MODEL; AMORPHOUS-ALLOYS; DEFORMATION; TEMPERATURE; EXAFS; STATE;

D O I：

10.1063/1.4879682

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The local structure around Ni and La atoms in Al85Ni10La5 amorphous powder after ball milling was investigated by X-ray absorption spectroscopy. A continuous decrease in coordination number of Ni and La as a function of milling time was observed, while the nearest neighbour distance and the mean square atomic displacement did not change, pointing at the creation of free volume around the Ni and La atoms. These structural changes resemble those of a liquid upon temperature increase. The results are described by a shear band model in which the coordination numbers of Ni and La are different within and outside a shear band. (C) 2014 AIP Publishing LLC.

引用

页数：8

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