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	Helium self-trapping and diffusion behaviors in deformed 316l stainless steel exposed to high flux and low energy helium plasma
	Gong,Yihao1,2; Jin,Shuoxue1; Zhu,Te1,2; Cheng,Long3; Cao,Xingzhong1; You,Li4; Lu,Guanghong3; Guo,Liping5; Wang,Baoyi1,2
刊名	Nuclear fusion
	2018-02-22
卷号	58期号:4
关键词	Helium self-trapping Hemvn complex Helium diffusion Dislocation 316l steel
ISSN号	0029-5515
DOI	10.1088/1741-4326/aaad19
英文摘要	Abstract a large number of dislocation networks were introduced in to 316l stainless steel by cold rolling. subsequently, low energy (40?ev) helium ions were implanted by exposing the steel to helium plasma. thermal desorption and positron annihilation spectroscopy were used to study the behavior of helium in the presence of dislocations, with emphasis on helium self-trapping and migration behaviors. helium desorption behaviour from different helium trapping states was measured by the thermal desorption spectroscopy. most of the helium desorbed from the hemvn clusters, and the corresponding desorption peak is located at ~650?k. the desorption peak from helium-dislocation clusters (hemd) is at approximately 805?k. the effect of annealing on the defect evolution was investigated by positron annihilation spectroscopy. for the specimen exposed to helium plasma without displacement damage, the increment of s parameter meant the existence of helium self-trapping behavior (hemvn). helium atoms could diffuse two to three orders of magnitude deeper than the implantation depth calculated by srim. the diffusing helium atoms were gradually trapped by dislocation lines and formed hemd. elevated temperatures enhance the self-trapping behavior and cause helium atoms to dissociate/desorb from the hemvn clusters, increasing the s parameters at 473–673?k. the gradual recovery of vacancies in the hemvn clusters decreased the s parameter above 673?k.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0029-5515-58-4-AAAD19
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2175753
专题	高能物理研究所
作者单位	1.Multi-Discipline Research Center, Institute of High Energy Physics, CAS, Beijing 100049, China 2.University of Chinese Academy of Sciences, Beijing 100039, China 3.Department of Physics, Beihang University, Beijing 100191, China 4.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People’s Republic of China 5.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
推荐引用方式 GB/T 7714	Gong,Yihao,Jin,Shuoxue,Zhu,Te,et al. Helium self-trapping and diffusion behaviors in deformed 316l stainless steel exposed to high flux and low energy helium plasma[J]. Nuclear fusion,2018,58(4).
APA	Gong,Yihao.,Jin,Shuoxue.,Zhu,Te.,Cheng,Long.,Cao,Xingzhong.,...&Wang,Baoyi.(2018).Helium self-trapping and diffusion behaviors in deformed 316l stainless steel exposed to high flux and low energy helium plasma.Nuclear fusion,58(4).
MLA	Gong,Yihao,et al."Helium self-trapping and diffusion behaviors in deformed 316l stainless steel exposed to high flux and low energy helium plasma".Nuclear fusion 58.4(2018).

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