Strengthening mechanisms of graphene coated copper under nanoindentation
文献类型：期刊论文
| 作者 | Zhao, YB; Peng, XH; Fu, T; Zhu, XF; Hu, N; Yan, C; Peng, XH (reprint author), Chongqing Univ, Coll Aerosp Engn, 174 Shazheng St, Chongqing 400044, Peoples R China.; Yan, C (reprint author), Queensland Univ Technol, Sch Chem Phys & Mech Engn, Sci & Engn Fac, 2 George St,GPO Box 2434, Brisbane, Qld, Australia. |
| 刊名 | COMPUTATIONAL MATERIALS SCIENCE
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 144页码:42-49 |
| ISSN号 | 0927-0256 |
| 关键词 | Molecular-dynamics Simulation Monolayer Graphene Deformation Twins Nanolayered Composites Atomistic Simulations Plastic-deformation Multilayers Metals Films Nanocomposites |
| 英文摘要 | We conduct molecular dynamics simulations to investigate the strengthening mechanisms of monolayer graphene coated copper during nanoindentation. It was found that the fracture of the graphene coating includes three stages: (i) initiation of decagon defects, (ii) growth of decagon defects, and (iii) formation of pearl necklace like structure. After the graphene breaks, the intact graphene coating around the indentation still plays a role in strengthening the copper substrate. The shear modulus mismatch and the lattice mismatch at the interface result in the image and misfit stresses, which act as a barrier to impede dislocations to slip out of the copper surface, thereinto, the image stress is the dominant. In addition, it is interesting to observe pristmatic partial dislocation loop and twinning planes during the indentation. (C) 2017 Elsevier B.V. All rights reserved.; We conduct molecular dynamics simulations to investigate the strengthening mechanisms of monolayer graphene coated copper during nanoindentation. It was found that the fracture of the graphene coating includes three stages: (i) initiation of decagon defects, (ii) growth of decagon defects, and (iii) formation of pearl necklace like structure. After the graphene breaks, the intact graphene coating around the indentation still plays a role in strengthening the copper substrate. The shear modulus mismatch and the lattice mismatch at the interface result in the image and misfit stresses, which act as a barrier to impede dislocations to slip out of the copper surface, thereinto, the image stress is the dominant. In addition, it is interesting to observe pristmatic partial dislocation loop and twinning planes during the indentation. (C) 2017 Elsevier B.V. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary |
| 语种 | 英语 |
| 资助机构 | National Natural Science Foundation of China [11332013, 11372104, 11632004]; ARC Discovery Project [150101717]; Key Program for International Science and Technology Cooperation Projects of Ministry of Science and Technology of China [2016YFE0125900]; program of China Scholarships Council [201606050043]; The High Performance Computing (HPC); CARF at QUT |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79466]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Peng, XH (reprint author), Chongqing Univ, Coll Aerosp Engn, 174 Shazheng St, Chongqing 400044, Peoples R China.; Yan, C (reprint author), Queensland Univ Technol, Sch Chem Phys & Mech Engn, Sci & Engn Fac, 2 George St,GPO Box 2434, Brisbane, Qld, Australia. |
| 推荐引用方式 GB/T 7714 | Zhao, YB,Peng, XH,Fu, T,et al. Strengthening mechanisms of graphene coated copper under nanoindentation[J]. COMPUTATIONAL MATERIALS SCIENCE,2018,144:42-49. |
| APA | Zhao, YB.,Peng, XH.,Fu, T.,Zhu, XF.,Hu, N.,...&Yan, C .(2018).Strengthening mechanisms of graphene coated copper under nanoindentation.COMPUTATIONAL MATERIALS SCIENCE,144,42-49. |
| MLA | Zhao, YB,et al."Strengthening mechanisms of graphene coated copper under nanoindentation".COMPUTATIONAL MATERIALS SCIENCE 144(2018):42-49. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。