|Title:||Annealing-induced shape recovery in thin film metallic glass||Authors:||Negussie A.T.
|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.
|Appears in Collections:||材料科學與工程學系|
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