Amorphous Thickness-Dependent Strengthening-Softening Transition in Crystalline-Amorphous Nanocomposites
文献类型：期刊论文
| 作者 | Qian, Lei; Yang, Wenqing; Luo, Jiasi; Wang YJ(王云江) ; Chan, K C; Yang, XuSheng
|
| 刊名 | NANO LETTERS
 |
| 出版日期 | 2023-11-20 |
| 卷号 | 23期号:23页码:11288-11296 |
| ISSN号 | 1530-6984 |
| 关键词 | crystalline-amorphous nanocomposite Cu-CuTa atomistic simulations codeformationcooperative mechanisms |
| DOI | 10.1021/acs.nanolett.3c03848 |
| 通讯作者 | Yang, Xu-Sheng(xsyang@polyu.edu.hk) |
| 英文摘要 | Core-shell crystalline-amorphous nanocomposites, featuring nanograins surrounded by thick amorphous boundaries, are promising nanoarchitectures for achieving exceptional strength through cooperative strengthening effects. However, a comprehensive understanding of the influence of characteristic sizes, particularly the amorphous thickness, on codeformation strengthening is still lacking, limiting the attainment of the strength limit. Here, we employ molecular dynamics simulations to investigate Cu-CuTa crystalline-amorphous nanocomposites with varying grain sizes and amorphous thicknesses. Our findings demonstrate significant strengthening effects in nanocomposites, effectively suppressing the Hall-Petch breakdown observed in traditional amorphous-free nanograined Cu. Intriguingly, we observe a maximum strength followed by a strengthening-softening transition dependent on the amorphous thickness, as exemplified by a representative nanocomposite featuring a 12.5 nm grain size and a critical amorphous thickness of 4 nm. Inspired by observed shifts in atomistic mechanisms, we developed a theoretical model encompassing variations in grain size and amorphous thickness, providing valuable insights into the size-strength relationship for crystalline-amorphous nanocomposites. |
| 分类号 | 一类 |
| WOS关键词 | MECHANICAL-BEHAVIOR ; DEFORMATION MECHANISMS ; SIZE ; DUCTILITY ; FILMS |
| 资助项目 | Hong Kong Polytechnic University[15210123] ; Hong Kong Research Grants Council[1-CD4K] ; PolyU grant[51971187] ; National Natural Science Foundation of China ; Research Committee of PolyU |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001142880300001 |
| 资助机构 | Hong Kong Polytechnic University ; Hong Kong Research Grants Council ; PolyU grant ; National Natural Science Foundation of China ; Research Committee of PolyU |
| 其他责任者 | Yang, Xu-Sheng |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/94079]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Qian, Lei,Yang, Wenqing,Luo, Jiasi,et al. Amorphous Thickness-Dependent Strengthening-Softening Transition in Crystalline-Amorphous Nanocomposites[J]. NANO LETTERS,2023,23(23):11288-11296. |
| APA | Qian, Lei,Yang, Wenqing,Luo, Jiasi,王云江,Chan, K C,&Yang, XuSheng.(2023).Amorphous Thickness-Dependent Strengthening-Softening Transition in Crystalline-Amorphous Nanocomposites.NANO LETTERS,23(23),11288-11296. |
| MLA | Qian, Lei,et al."Amorphous Thickness-Dependent Strengthening-Softening Transition in Crystalline-Amorphous Nanocomposites".NANO LETTERS 23.23(2023):11288-11296. |
入库方式： OAI收割
来源：力学研究所
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