https://scholars.lib.ntu.edu.tw/handle/123456789/425049
Title: | Annealing-induced shape recovery in thin film metallic glass | Authors: | Negussie A.T. Diyatmika W. Chu J.P. Shen Y.L. Jang J.S.C. Hsueh C.H. CHUN-HWAY HSUEH |
Keywords: | Annealing;Indentation depth recovery;Roughness;Thin film metallic glass | Issue Date: | 2014 | Journal Volume: | 613 | Start page/Pages: | 157-163 | Source: | Journal of Alloys and Compounds | Abstract: | The shape recovery property of a sputtered Zr50.3Cu 28.1Al14Ni7.6 (in at.%) thin film metallic glass upon heating is examined. Due to the surface tension-driven viscous flow, the shape of indentation appears to recover to different extents at various temperatures and holding times. It is found that a maximum of 59.8% indentation depth recovery is achieved after annealing within the supercooled liquid region (SCLR). The amount of free volume in the film is found to play a role in the recovery. Atomic force microscopy results reveal a decrease in film roughness to a minimum value within SCLR. To elucidate the experimentally observed shape recovery, a numerical modeling has been employed. It is evident that the depressed region caused by indentation is elevated after annealing. ? 2014 Elsevier B.V. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/425049 | ISSN: | 09258388 | DOI: | 10.1016/j.jallcom.2014.06.048 |
Appears in Collections: | 材料科學與工程學系 |
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