Journal
ACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume 29, Issue 6, Pages 538-545Publisher
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-016-0416-z
Keywords
Bulk metallic glass; Phase separation; In situ TEM heating; Crystallization; Glass forming ability
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Funding
- National Natural Science Foundation of China [51101004]
- China Scholarship Council
- IMR SYNL-T.S. Ke Research Fellowship
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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.
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