| Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence | |
| Wu, Peng1,2; Ye, Xing-Long1; Liu, Ling-Zhi1; Jin, Hai-Jun1 | |
| Corresponding Author | Jin, Hai-Jun(hjjin@imr.ac.cn) |
| 2018 | |
| Source Publication | MATERIALS RESEARCH LETTERS
 |
| ISSN | 2166-3831 |
| Volume | 6Issue:9Pages:508-514 |
| Abstract | Compression of nanoporous gold in situ under electrochemical control reveals that its flow stress can be enhanced by surface coverage of monolayer oxide. Here we present a study on the monolayer oxide induced changes in flow stress of an nanoporous gold, while the ligament size is varied by more than 2 orders of magnitude. The increase percentage of flow stress (of nanoporous gold and nano-ligaments) induced by surface monolayer oxide is negligible when the ligament size (L) exceeds similar to 2 mu m, increases with decreasing L for similar to 200nm < L < similar to 2 mu m, and then saturates at similar to 27% for L < similar to 200 nm. These results indicate a transition from bulk-like to surface-mediated deformation behavior of nano-ligaments as L decreases from similar to 2 mu m to similar to 200 nm. Our observation at L < similar to 200nm support the notion that the deformation is dominated by the surface-dislocationnucleation at this scale. [GRAPHICS] IMPACT STATEMENT This study shows that the surface-modification induced hardening in nanoporous Au doesn't increase monotonically with decreasing structure size as usually thought, providing new clues to the understandings of nano-crystal plasticity. |
| Keyword | Strength flow stress size-effect surface-effect nanoporous gold |
| Funding Organization | National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province |
| DOI | 10.1080/21663831.2018.1486337 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2017YFA0204401] ; Natural Science Foundation of China[51571206] ; Natural Science Foundation of Liaoning Province[2014029103] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000439589200005 |
| Publisher | TAYLOR & FRANCIS INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/135876 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Jin, Hai-Jun |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Peng,Ye, Xing-Long,Liu, Ling-Zhi,et al. Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence[J]. MATERIALS RESEARCH LETTERS,2018,6(9):508-514. |
| APA | Wu, Peng,Ye, Xing-Long,Liu, Ling-Zhi,&Jin, Hai-Jun.(2018).Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence.MATERIALS RESEARCH LETTERS,6(9),508-514. |
| MLA | Wu, Peng,et al."Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence".MATERIALS RESEARCH LETTERS 6.9(2018):508-514. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment