Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence
文献类型：期刊论文
| 作者 | Wu, P1; Ye, XL; Liu, LZ; Jin, HJ |
| 刊名 | MATERIALS RESEARCH LETTERS
 |
| 出版日期 | 2018-01-23 |
| 卷号 | 6期号:9页码:508-514 |
| 关键词 | Strength flow stress size-effect surface-effect nanoporous gold |
| ISSN号 | 2166-3831 |
| DOI | 10.1080/21663831.2018.1486337 |
| 英文摘要 | 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. |
| 学科主题 | Materials Science, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000439589200005 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/80241]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 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 |
| 推荐引用方式 GB/T 7714 | Wu, P,Ye, XL,Liu, LZ,et al. Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence[J]. MATERIALS RESEARCH LETTERS,2018,6(9):508-514. |
| APA | Wu, P,Ye, XL,Liu, LZ,&Jin, HJ.(2018).Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence.MATERIALS RESEARCH LETTERS,6(9),508-514. |
| MLA | Wu, P,et al."Monolayer oxide enhanced flow stress in nanoporous gold: the size dependence".MATERIALS RESEARCH LETTERS 6.9(2018):508-514. |
入库方式： OAI收割
来源：金属研究所
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