Effects of self-interstitial atom on behaviors of hydrogen and helium in tungsten
文献类型：期刊论文
| 作者 | You, Yu-Wei1,3; Sun, Jingjing2; Kong, Xiang-Shan4; Wu, Xuebang1 ; Xu, Yichun1; Wang, X. P.1; Fang, Q. F.1; Liu, C. S.1
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| 刊名 | PHYSICA SCRIPTA
 |
| 出版日期 | 2020-07-01 |
| 卷号 | 95 |
| 关键词 | Nuclear fusion Plasma facing materials Tungsten hydrogen and helium |
| ISSN号 | 0031-8949 |
| DOI | 10.1088/1402-4896/ab93e5 |
| 通讯作者 | Xu, Yichun(xuyichun@issp.ac.cn) |
| 英文摘要 | Neutron irradiation induces a large number of vacancies and self-interstitial atoms (SIAs) that interact with hydrogen atoms (H) and degrade the mechanical properties of tungsten (W) in a fusion environment. Vacancies increase free space and trap H atoms, however, the effects of SIAs on trapping H atoms are still unclear since SIAs decrease free space. We therefore perform systematical ab initio calculations to study the interactions of SIAs and SIAs clusters with H atoms in W. Our results suggest that SIA < 111 > dumbbell makes interstitial H atoms easy to accumulate in W. With accumulation of H atoms near a SIA < 111 > dumbbell, the binding energy decreases firstly and then levels off at about 0.3 eV. For comparison, the interactions of SIAs and SIAs clusters with helium (He) atoms are considered. It is found that SIAs and SIAs clusters can also act as trapping centers for interstitial He atoms. The combinations of SIAs with H and He hinder the fast movement of SIAs in W to annihilate with vacancies, increasing the concentrations of SIAs and vacancies in grain. SIAs and vacancies provide more sites for trapping H and He atoms and thus increase irradiation damage in W. We therefore suggest reducing retention of H isotopes and He in W to suppress irradiation damage. |
| WOS关键词 | AB-INITIO ; LOW-ENERGY ; MOLECULAR-DYNAMICS ; POINT-DEFECTS ; HIGH-FLUX ; 1ST-PRINCIPLES ; IRRADIATION ; IMPURITIES ; ENERGETICS ; RETENTION |
| 资助项目 | National Key Research and Development Program of China[2017YFE0302400] ; National Key Research and Development Program of China[2017YFA0402800] ; National Natural Science Foundation of China[11 735 015] ; National Natural Science Foundation of China[U1967211] ; National Natural Science Foundation of China[51 671 185] ; National Natural Science Foundation of China[51 771 185] ; Science and Technology on Surface Physics and Chemistry Laboratory[0 202 517] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000538472900001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Science and Technology on Surface Physics and Chemistry Laboratory |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103119]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xu, Yichun |
| 作者单位 | 1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, POB 1129, Hefei 230031, Peoples R China 2.Zhongyuan Univ Technol, Coll Sci, Zhengzhou 450007, Peoples R China 3.Anhui Jianzhu Univ, Sch Math & Phys, Hefei 230601, Peoples R China 4.Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | You, Yu-Wei,Sun, Jingjing,Kong, Xiang-Shan,et al. Effects of self-interstitial atom on behaviors of hydrogen and helium in tungsten[J]. PHYSICA SCRIPTA,2020,95. |
| APA | You, Yu-Wei.,Sun, Jingjing.,Kong, Xiang-Shan.,Wu, Xuebang.,Xu, Yichun.,...&Liu, C. S..(2020).Effects of self-interstitial atom on behaviors of hydrogen and helium in tungsten.PHYSICA SCRIPTA,95. |
| MLA | You, Yu-Wei,et al."Effects of self-interstitial atom on behaviors of hydrogen and helium in tungsten".PHYSICA SCRIPTA 95(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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