Evidence of structure relaxation prior to nanocrystallization in an Al-based metallic glass

被引：18
|
作者：
Yang, H. W. [1 ]
Wang, J. Q. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 04期
基金：
中国国家自然科学基金;
关键词：
metallic glasses; differential scanning calorimetry (DSC); crystallization; structural relaxation;
D O I：
10.1016/j.scriptamat.2006.04.042
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An asymptotically decreasing signal is observed in the initial part of the isothermal DSC curves at 275, 285 and 290 degrees C of an Al85Ni5Y6Co2Fe2 metallic glass with a supercooled liquid region. We demonstrate that the monotonically decaying signal originates from the structural relaxation of the quenched glass, rather than from the growth of the quenched-in nuclei. At 285 and 290 degrees C, an exothermic peak overlaps with the structural relaxation, corresponding to the precipitation of nanometer-sized Al crystals. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：359 / 362
页数：4
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