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题名: Creeping Motion of Self Interstitial Atom Clusters in Tungsten
作者: Zhou, WH;  Zhang, CG;  Li, YG;  Zeng, Z
刊名: SCIENTIFIC REPORTS
出版日期: 2014
卷号: 4, 期号:-, 页码:5096
关键词: DISLOCATION LOOPS ;  TRANSITION-METALS ;  COLLISION CASCADES ;  DEFECT PRODUCTION ;  MOBILITY ;  ENERGY ;  DIFFUSION ;  IRON
学科分类: Physics
DOI: 10.1038/srep05096
通讯作者: Zeng, Z (reprint author), Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China.
部门归属: [Zhou, Wang Huai
英文摘要: The formation and motion features of self interstitial atom (SIA) clusters in tungsten are studied by molecular dynamics (MD) simulations. The static calculations show that the SIA clusters are stable with binding energy over 2 eV. The SIA clusters exhibit a fast one dimensional (1D) motion along < 111 >. Through analysis of the change of relative distance between SIAs, we find that SIAs jump in small displacements we call creeping motion, which is a new collective diffusion process different from that of iron. The potential energy surface of SIAs implicates that the creeping motion is due to the strong interaction between SIAs. These imply that several diffusion mechanism for SIA clusters can operate in BCC metals and could help us explore deep insight into the performance of materials under irradiation.
资助者: National Science Foundation of China [11275229, NSAFU1230202]; special Funds for Major State Basic Research Project of China (973) [2012CB933702]; Anhui Provincial Natural Science Foundation [1208085QA05]; Hefei Center for Physical Science and Technology [2012FXZY004]; CASHIPS
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000336425400008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15754
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Zhou, WH,Zhang, CG,Li, YG,et al. Creeping Motion of Self Interstitial Atom Clusters in Tungsten[J]. SCIENTIFIC REPORTS,2014,4(-):5096.
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