Direct observation of solute interstitials and their clusters in Mg alloys
文献类型：期刊论文
| 作者 | Yang, Z. Q. ; Ma, S. Y. ; Hu, Q. M. ; Ye, H. Q. ; Chisholm, M. F. |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 128页码:226-231 |
| ISSN号 | 1044-5803 |
| 关键词 | Interstitial Crowdion Dumbbell Aberration-corrected electron microscopy Density functional theory |
| 通讯作者 | Yang, ZQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China. |
| 中文摘要 | Individual solute interstitial atoms in Mg alloys were directly observed through aberration-corrected Z-contrast imaging. The atomic species and local positions of solute interstitials were further determined in combination of density functional theory calculations based on their formation energy. Individual octahedral and tetrahedral interstitials in hexagonal-close-packed Mg are Zn and Y, respectively. Interestingly, there are six positions around the center of each octahedral interstice, which can also accommodate a Zn interstitial, besides the ideal octahedral interstice. Y tetrahedral interstitials evolve to [0001] Y-Mg dumbbells. Moreover, an Y atom can form a crowdion between two neighboring Mg atoms along the <20<(2)over bar>3> direction. In particular, small clusters consisting of various point defects were observed, providing direct evidence for enthalpy-driven clustering of point defects, which may have implications for atomic-scale understanding of nucleation mechanisms of strengthening precipitates. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| 资助信息 | National Natural Science Foundation of China [51371178, 51390473]; Liaoning Province [2015020237]; Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division; DOE Office of Science User Facility |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2017-08-17 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/78098]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Yang, Z. Q.,Ma, S. Y.,Hu, Q. M.,et al. Direct observation of solute interstitials and their clusters in Mg alloys[J]. MATERIALS CHARACTERIZATION,2017,128:226-231. |
| APA | Yang, Z. Q.,Ma, S. Y.,Hu, Q. M.,Ye, H. Q.,&Chisholm, M. F..(2017).Direct observation of solute interstitials and their clusters in Mg alloys.MATERIALS CHARACTERIZATION,128,226-231. |
| MLA | Yang, Z. Q.,et al."Direct observation of solute interstitials and their clusters in Mg alloys".MATERIALS CHARACTERIZATION 128(2017):226-231. |
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。