Direct TEM Observation of Phase Separation and Crystallization in Cu45Zr45Ag10 Metallic Glass

The structural evolution of Cu 45 Zr 45 Ag 10 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...

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Bibliographic Details
Published in:Acta metallurgica sinica : English letters 2016-06, Vol.29 (6), p.538-545
Main Authors: Wang, Hui, Xiao, Shang-Gang, Zhang, Tao, Xu, Qiang, Liu, Zeng-Qian, Wu, Meng-Yue, Tichelaar, Frans, Zandbergen, Henny
Format: Article
Language:English
Subjects:
Alloys
Amorphous materials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Crystallization
Experiments
High temperature
Ion beams
Materials Science
Metallic glasses
Metallic Materials
Microscopy
Morphology
Nanospheres
Nanotechnology
Nucleation
Organometallic Chemistry
Phase separation
Spectroscopy/Spectrometry
Tribology
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Summary:The structural evolution of Cu 45 Zr 45 Ag 10 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.
ISSN:1006-7191
2194-1289
DOI:10.1007/s40195-016-0416-z