期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 615, 期 -, 页码 S45-S50出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.12.162
关键词
Metallic glasses; Structural relaxation; Atomic dynamics; Internal stresses
资金
- CICYT [MAT2010-14907]
- Generalitat de Catalunya [2009SGR1251, 2012FI-DGR]
We present a temperature investigation of the structural and dynamical evolution of rapidly quenched metallic glasses of Mg65Cu25Y10 at the atomic length scale by means of in situ high energy X-ray diffraction and time resolved X-ray photon correlation spectroscopy. We find a flattening of the temperature evolution of the position of the first sharp diffraction peak on approaching the glass transition temperature from the glassy state, which reflects into a surprising slowing down of the relaxation dynamics of even one order of magnitude with increasing temperature. The comparison between structural and dynamical properties strengthens the idea of a stress-induced, rather than pure diffusive, atomic motion in metallic glasses. (C) 2013 Elsevier B.V. All rights reserved.
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