Microstructure evolution and Young's modulus of He-implanted nanocrystalline tungsten film
文献类型：期刊论文
| 作者 | Zhu, Fei1,2; Wang, Dong2; Gao, Ning3; Peng, Haiqing4; Xie, Zheng5; Zhang, Zhengjun2,6 |
| 刊名 | JOURNAL OF NUCLEAR MATERIALS
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 518页码:226-233 |
| 关键词 | Nanocrystalline tungsten film He bubbles Young's modulus |
| ISSN号 | 0022-3115 |
| DOI | 10.1016/j.jnucmat.2019.03.009 |
| 英文摘要 | Nanocrystalline tungsten has been widely investigated due to its excellent irradiation resistance. In this study, the microstructure and related Young's modulus of nanocrystalline tungsten film prepared by dual ion beam sputtering deposition and subsequently irradiated by 30 keV He+ of varying fluences at room temperature have been studied by experimental and simulation methods. The mean He bubble size is about 0.7 nm, and the implanted He is preferred to be trapped by the grain boundaries. Few He bubbles are formed nearby the high density defect regions due to more trapping sites for He atoms. The lattice swelling increases with the increase of He fluence. The Young's modulus of the films was measured by LAwave, which indicates the Young's modulus decreases with the increase of He fulence. Molecular dynamics simulations are performed to explore the dependence of Young's modulus on the swelling and the properties of He bubbles. The results indicate that the lattice swelling has a limited influence on Young's modulus. The concentration of He is confirmed to seriously affect the Young's modulus after He implantation. With the same concentration of He atoms, the distribution of He bubbles is a key factor on tensile strength. The He bubbles at grain boundary have a stronger influence on the tensile strength than that in grain interior. He bubbles with higher He/V ratios affect more significantly on the mechanical properties. All these results provide new understandings for radiation damages of nano-materials used in reactors. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | ATOMISTIC SIMULATIONS ; MECHANICAL-PROPERTIES ; HELIUM ; IRRADIATION ; DIFFUSION |
| 资助项目 | Science Challenge Project[TZ2018004] ; National Natural Science Foundation of China[51701103] ; National Natural Science Foundation of China[11675230] ; China Postdoctoral Science Foundation[2016M600084] |
| WOS研究方向 | Materials Science ; Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000464940700022 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Science Challenge Project ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation |
| 源URL | [http://119.78.100.186/handle/113462/134016]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Zhang, Zhengjun |
| 作者单位 | 1.Tsinghua Univ, Dept Engn & Phys, Beijing 100084, Peoples R China 2.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, MOE, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 4.Jianzhong Nucl Fuel Co Ltd, CNNC, Yibin 644000, Peoples R China 5.High Tech Inst Xian, Xian 710025, Shaanxi, Peoples R China 6.Collaborat Innovat Ctr Adv Nucl Energy Technol, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Fei,Wang, Dong,Gao, Ning,et al. Microstructure evolution and Young's modulus of He-implanted nanocrystalline tungsten film[J]. JOURNAL OF NUCLEAR MATERIALS,2019,518:226-233. |
| APA | Zhu, Fei,Wang, Dong,Gao, Ning,Peng, Haiqing,Xie, Zheng,&Zhang, Zhengjun.(2019).Microstructure evolution and Young's modulus of He-implanted nanocrystalline tungsten film.JOURNAL OF NUCLEAR MATERIALS,518,226-233. |
| MLA | Zhu, Fei,et al."Microstructure evolution and Young's modulus of He-implanted nanocrystalline tungsten film".JOURNAL OF NUCLEAR MATERIALS 518(2019):226-233. |
入库方式： OAI收割
来源：近代物理研究所
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