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

Wang, H.; Xiao, Shang Gang Xiao; Zhang, Tao; Xu, Q.; Liu, Zeng Qian; Wu, M.; Tichelaar, F.D.; Zandbergen, H.W.

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

Journal article (2016)

Authors

H. Wang Beihang University

Shang Gang Xiao 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

Crystallization Phase separation In situ TEM heating Bulk metallic glass Glass forming ability

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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.