Nucleation and growth of helium bubble at (110) twist grain boundaries in tungsten studied by molecular dynamics

doi:10.1088/1674-1056/28/8/085203

	Nucleation and growth of helium bubble at (110) twist grain boundaries in tungsten studied by molecular dynamics
	Li, Fang-Biao 1; Ran, Guang 1; Gao, Ning 2,3; Zhao, Shang-Quan 1; Li, Ning1
刊名	CHINESE PHYSICS B
	2019-08-01
卷号	28 期号:8 页码:9
关键词	tungsten dislocation patterns ordered grain boundary structure plate-shape He bubble
ISSN号	1674-1056
DOI	10.1088/1674-1056/28/8/085203
通讯作者	Ran, Guang(gran@xmu.edu.cn) ; Gao, Ning(ning.gao@impcas.ac.cn)
英文摘要	Migration of He atoms and growth of He bubbles in high angle twist grain boundaries (HAGBs) in tungsten (W) are investigated by atomic simulation method. The energy and free volume (FV) of grain boundary (GB) are affected by the density and structure of dislocation patterns in GB. The migration energy of the He atom between the neighboring trapping sites depends on free volume along the migration path at grain boundary. The region of grain boundary around the He bubble forms an ordered crystal structure when He bubble grows at certain grain boundaries. The He atoms aggregate on the grain boundary plane to form a plate-shape configuration. Furthermore, high grain boundary energy (GBE) results in a large volume of He bubble. Thus, the nucleation and growth of He bubbles in twist grain boundaries depend on the energy of grain boundary, the dislocation patterns and the free volume related migration path on the grain boundary plane.
资助项目	National Natural Science Foundation of China[11305136] ; National Natural Science Foundation of China[11675230] ; National Natural Science Foundation of China[11375242] ; National Natural Science Foundation of China[U1832112]
WOS关键词	RADIATION-DAMAGE ; SIMULATION ; DIFFUSION ; RETENTION ; ATOMS ; BULK
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000481702800003
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/113462/132830]
专题	中国科学院近代物理研究所
通讯作者	Ran, Guang; Gao, Ning
作者单位	1.Xiamen Univ, Coll Energy, Xiamen 361102, Fujian, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Gansu, Peoples R China 3.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100094, Peoples R China
推荐引用方式 GB/T 7714	Li, Fang-Biao,Ran, Guang,Gao, Ning,et al. Nucleation and growth of helium bubble at (110) twist grain boundaries in tungsten studied by molecular dynamics[J]. CHINESE PHYSICS B,2019,28(8):9.
APA	Li, Fang-Biao,Ran, Guang,Gao, Ning,Zhao, Shang-Quan,&Li, Ning.(2019).Nucleation and growth of helium bubble at (110) twist grain boundaries in tungsten studied by molecular dynamics.CHINESE PHYSICS B,28(8),9.
MLA	Li, Fang-Biao,et al."Nucleation and growth of helium bubble at (110) twist grain boundaries in tungsten studied by molecular dynamics".CHINESE PHYSICS B 28.8(2019):9.