Clustering and dislocation loop punching induced by different noble gas bubbles in tungsten: a molecular dynamics study

doi:10.1088/1361-651X/ab3ab5

	Clustering and dislocation loop punching induced by different noble gas bubbles in tungsten: a molecular dynamics study
	Gao, Fei 3,4; Hu, Wangyu 3; Chen, Yangchun 1; Gao, Ning 2; Fang, Jingzhong 1; Deng, Huiqiu 1
刊名	MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
	2019-12-01
卷号	27 期号:8 页码:17
关键词	dislocation loop punching molecular dynamics tungsten helium neon clustering
ISSN号	0965-0393
DOI	10.1088/1361-651X/ab3ab5
通讯作者	Gao, Ning(ning.gao@impcas.ac.cn) ; Deng, Huiqiu(hqdeng@hnu.edu.cn)
英文摘要	Different behaviours of noble gas X (X = He or Ne) atoms in the bulk and on the surface of tungsten (W) have been studied with molecular dynamics simulations to explore the fuzz formation induced by different noble gas bubbles. The formation of X clusters and bubbles in bulk W were simulated at temperatures from 400 to 2000 K. The results showed that higher temperature promotes the nucleation of X bubbles, and the sizes of self-interstitial atoms and X-vacancy clusters of Ne in W were larger than those of He in W at nano-scale, which indicates that Ne atoms can be trapped more easily than He atoms in W. The continuous nucleation processes of He/Ne bubbles near the surface of bulk W were also simulated. When the sizes of the X bubbles were large enough, the behaviour of dislocation loop punching was observed for both He and Ne clusters. From the comparison of the pressure of He/Ne bubble, it is found that the He-bubble can induce the loop-punching with lower critical pressure than the case of Ne-bubble. These results indicate a new understanding of noble gas effects in W in fusion reactors.
资助项目	National Natural Science Foundation of China[51771073] ; National Natural Science Foundation of China[11675230] ; National Natural Science Foundation of China[51371080] ; National Natural Science Foundation of China[11375242]
WOS关键词	PLASMA-FACING COMPONENTS ; FREE SURFACES ; HELIUM ; SIMULATIONS ; HE ; 1ST-PRINCIPLES ; IRRADIATION ; BEHAVIOR ; DIVERTOR ; WALL
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000484125000002
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/132754]
专题	中国科学院近代物理研究所
通讯作者	Gao, Ning; Deng, Huiqiu
作者单位	1.Hunan Univ, Sch Phys & Elect, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 3.Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China 4.Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
推荐引用方式 GB/T 7714	Gao, Fei,Hu, Wangyu,Chen, Yangchun,et al. Clustering and dislocation loop punching induced by different noble gas bubbles in tungsten: a molecular dynamics study[J]. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,2019,27(8):17.
APA	Gao, Fei,Hu, Wangyu,Chen, Yangchun,Gao, Ning,Fang, Jingzhong,&Deng, Huiqiu.(2019).Clustering and dislocation loop punching induced by different noble gas bubbles in tungsten: a molecular dynamics study.MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,27(8),17.
MLA	Gao, Fei,et al."Clustering and dislocation loop punching induced by different noble gas bubbles in tungsten: a molecular dynamics study".MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 27.8(2019):17.