Influence of radiation defects on deuterium permeation behavior in tungsten

doi:10.1016/j.jnucmat.2020.152455

	Influence of radiation defects on deuterium permeation behavior in tungsten
	Liu, Feng 2,3,4; Zhou, Hai-Shan 3; Xu, Chuan 5; Cao, Xingzhong 1; Ding, Fang 3; Luo, Guang-Nan 3
刊名	JOURNAL OF NUCLEAR MATERIALS
	2020-12-15
卷号	542
关键词	Hydrogen isotopes Tungsten Radiation defects Permeation Diffusion
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2020.152455
通讯作者	Liu, Feng(liufeng@njust.edu.cn)
英文摘要	Understanding the hydrogen isotope (H) permeation behavior in neutron irradiated tungsten (W) is highly desired for the accurate prediction of H behavior in W first walls in a fusion DEMO reactor. Contrary studies have been published where some indicated a relatively higher H permeability in the irradiated W whereas others showed a lower H permeability. In these studies the radiation defects were produced with ions (as surrogates for neutrons) and were concentrated in a shallow layer (<200 nm), their effects could be mixed up with surface effects during H permeation. Herein W specimens damaged to 800 nm by Au-ion implantation are adopted to investigate the effects of radiation defects on deuterium (D) permeation. Microstructural analyses with slow positron annihilation technique and transmission electron microscopy revealed that vacancy-type defects and dislocation loops were produced in the implanted W. Results from D-2 gas-driven permeation measurements at 700-10 00 K showed, surprisingly, radiation defects did not influence the D permeability. The phenomenon was illustrated from a thermodynamic perspective. Radiation-induced dislocations and/or monovacancies, possessing low H coverage fractions, do not affect permeability because their effects on effective diffusivity and solubility can fully cancel each other. Vacancy clusters, having a high fractional H coverage and owing to their strong trapping nature, will not come to effect during the steady-state permeation portion, thus do not contribute to permeability. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[11705232] ; National Magnetic Confinement Fusion Science Program of China[2015GB109001] ; Open fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing Univ. of Aeronautics and Astronautics), Ministry of Industry and Information Technology[56XCA18159]
WOS关键词	GAS-DRIVEN PERMEATION ; HYDROGEN ISOTOPES ; W-ALLOYS ; PERMEABILITY ; TEMPERATURE ; DIFFUSIVITY ; IRRADIATION ; SOLUBILITY ; RETENTION ; STEELS
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000583242500016
资助机构	National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China ; Open fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing Univ. of Aeronautics and Astronautics), Ministry of Industry and Information Technology
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/105142]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Feng
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Nanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.Nanjing Univ Aeronaut & Astronaut, Key Lab Mat Preparat & Protect Harsh Environm, Minist Ind & Informat Technol, Nanjing 210094, Peoples R China 5.Peking Univ, Inst Heavy Ion Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Liu, Feng,Zhou, Hai-Shan,Xu, Chuan,et al. Influence of radiation defects on deuterium permeation behavior in tungsten[J]. JOURNAL OF NUCLEAR MATERIALS,2020,542.
APA	Liu, Feng,Zhou, Hai-Shan,Xu, Chuan,Cao, Xingzhong,Ding, Fang,&Luo, Guang-Nan.(2020).Influence of radiation defects on deuterium permeation behavior in tungsten.JOURNAL OF NUCLEAR MATERIALS,542.
MLA	Liu, Feng,et al."Influence of radiation defects on deuterium permeation behavior in tungsten".JOURNAL OF NUCLEAR MATERIALS 542(2020).