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Self-similarity in the structure of coarsened nanoporous gold

Authors
Jeon, Hansol; Kang, Na-Ri; Gwak, Eun-Ji; Jang, Jae-il; Han, Heung Nam; Hwang, Jun Yeon; Lee, Sukbin; Kim, Ju-Young
Issue Date
2017-08
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SCRIPTA MATERIALIA, v.137, pp.46 - 49
Abstract
Nanoporous gold (np-Au) samples of ligament sizes 68.6, 248.6, 462.9, and 710.9 nm are prepared by heat treatment, and representative volumes are reconstructed by focused ion beam (FIB) tomography. The increase in relative density by thermal coarsening is not pronounced. We analyze the distribution of ligament size, surface-to volume ratio, and scaled connectivity density for coarsened np-Au, revealing that np-Au coarsens in a self-similar way. The measured activation energy for thermal coarsening supports that it is accomplished by surface diffusion of Au. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Keywords
MECHANICAL-BEHAVIOR; SCALING RELATIONS; YIELD STRENGTH; EVOLUTION; QUANTIFICATION; CONNECTIVITY; MORPHOLOGY; DIFFUSION; BONE; AU; MECHANICAL-BEHAVIOR; SCALING RELATIONS; YIELD STRENGTH; EVOLUTION; QUANTIFICATION; CONNECTIVITY; MORPHOLOGY; DIFFUSION; BONE; AU; Annealing; 3D reconstruction; Focused ion beam (FIB); Cellular materials; Nanoporous gold
ISSN
1359-6462
URI
https://pubs.kist.re.kr/handle/201004/122489
DOI
10.1016/j.scriptamat.2017.05.009
Appears in Collections:
KIST Article > 2017
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