Identification of critical nuclei in the rapid solidification via configuration heredity
文献类型：期刊论文
| 作者 | Li,Yuan1; Peng,Ping1; Xu,Dongsheng2; Yang,Rui2 |
| 刊名 | Journal of Physics: Condensed Matter
 |
| 出版日期 | 2021-04-21 |
| 卷号 | 33期号:17 |
| ISSN号 | 0953-8984 |
| 关键词 | critical nucleus configuration heredity rapid solidification homogeneous nucleation |
| DOI | 10.1088/1361-648X/abe0e1 |
| 通讯作者 | Peng,Ping() |
| 英文摘要 | AbstractThe identification and characterization of critical nuclei is a long-standing issue in the rapid solidification of metals and alloys. An ambiguous description for their sizes and shapes used to lead to an overestimation or underestimation of homogeneous nucleation rates IT in the framework of classical nucleation theory (CNT). In this paper, a unique method able to distinguish the critical nucleus from numerous embryos is put forward on the basis of configuration heredities of clusters during rapid solidifications. As this technique is applied to analyze the formation and evolution of various fcc-Al single crystal clusters in a large-scale molecular dynamics simulation system, it is found that the size nc and geometrical configuration of critical nuclei as well as their liquid–solid interfacial structure can be determined directly. For the present deep super-cooled system with an undercooling of Tm=0.42Tmcal, the average size of critical nuclei is demonstrated to be nc?≈26, but most of which are non-spherical lamellae. Also, their liquid–solid interfaces are revealed to be not an fcc-liquid duplex-phase interface but an fcc/hcp-liquid multi-phase structure. These findings shed some lights on the CNT, and a good agreement with previous simulations and experiments in IT indicates this technique can be used to explore the early-stage of nucleation from atomistic levels. |
| 语种 | 英语 |
| 出版者 | IOP Publishing |
| WOS记录号 | IOP:0953-8984-33-17-ABE0E1 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/159382]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Peng,Ping |
| 作者单位 | 1.School of Material Science & Engineering, Hunan University, Changsha 410082, People’s Republic of China 2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Li,Yuan,Peng,Ping,Xu,Dongsheng,et al. Identification of critical nuclei in the rapid solidification via configuration heredity[J]. Journal of Physics: Condensed Matter,2021,33(17). |
| APA | Li,Yuan,Peng,Ping,Xu,Dongsheng,&Yang,Rui.(2021).Identification of critical nuclei in the rapid solidification via configuration heredity.Journal of Physics: Condensed Matter,33(17). |
| MLA | Li,Yuan,et al."Identification of critical nuclei in the rapid solidification via configuration heredity".Journal of Physics: Condensed Matter 33.17(2021). |
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。