Direct TEM observation of phase separation and crystallization in Cu45Zr45Ag10 metallic glass

Journal article (2016)

Authors

H. Wang Beihang University
Gang Xiao Beihang University
Tao Zhang Beihang University
Q. Xu QN/Zandbergen Lab
Zeng Qian Liu Chinese Academy of Sciences
M. Wu QN/Zandbergen Lab
F.D. Tichelaar QN/Zandbergen Lab
H.W. Zandbergen QN/Zandbergen Lab
Research Group
QN/Zandbergen Lab
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Published Date

2016

Language

English

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Research Group

QN/Zandbergen Lab

Abstract

The structural evolution of Cu45Zr45Ag10 metallic glass was investigated by in situ transmission electron microscopy heating experiments. The relationship between phase separation and crystallization was elucidated. Nucleation and growth-controlled nanoscale phase separation at early stage were seen to impede nanocrystallization, while a coarser phase separation via aggregation of Ag-rich nanospheres was found to promote the precipitation of Cu-rich nanocrystals. Coupling of composition and dynamics heterogeneities was supposed to play a key role during phase separation preceding crystallization.