Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 442, Issue -, Pages 67-72Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2016.03.016
Keywords
Metallic glass; Nanoindentation; Strain rate sensitivity; Creep; Shear transformation zone
Funding
- National Natural Science Foundation of China [11502235, 11272318, 11025212, 11402233]
- Zhejiang Provincial Natural Science Foundation of China [LQ15A020004]
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Upon nanoindentation, the rate-jump method and creep test were conducted on Cu-Zr-Al metallic glassy films with thickness of 500 nm, 900 nm and 1500 nm. Based on the strain rate sensitivities (SRS) estimated by the two methods, the shear transformation zone (STZ) volumes of all the samples could be determined, respectively. Both experiment results show STZ volume increases with the film thickness increasing. In addition, substrate effect was carefully excluded on the present measurements. The variation trend of STZ volume was discussed in terms of free volume content, which was thought to be concerned with the sputtering process. (C) 2016 Elsevier B.V. All rights reserved.
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