Journal
ACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume 28, Issue 11, Pages 1332-1335Publisher
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-015-0330-9
Keywords
Metallic glass; Electron irradiation; Transmission electron microscopy; Phase separation; Crystallization
Categories
Funding
- National Natural Science Foundation of China [51271119]
- Doctoral Program of Higher Education of China [20110073110005]
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A nanoscale Fe56.5Mn11Cr8.5Ni4Si10C10 metallic glass was irradiated by electron beam in a 200 kV transmission electron microscope. Structure evolution in the metallic glass was investigated in situ during continuous irradiation, where phase separation was observed after irradiation for 5 mm and crystallization was observed after 33.5 mm. Based on the analysis of irradiation effect, atomic displacement is believed to be the main reason for the structure rearrangement. Accumulation of atomic displacement increases the energy of the sample and promotes atomic diffusion during transformation. On the other hand, the large specific surface area of the sample also contributes to increasing free energy and atomic diffusion.
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