Simulation study of effects of grain boundary and helium bubble on lattice thermal resistance of tungsten
文献类型：期刊论文
| 作者 | Ding, Yingmei2; Wu, Xuebang1 ; Zhan, Jie2; Chen, Ze2; Mao, Shifeng2; Ye, Minyou2
|
| 刊名 | FUSION ENGINEERING AND DESIGN
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 168 |
| 关键词 | Tungsten Grain boundary Grain boundary energy The Kapitza resistance Helium bubble |
| ISSN号 | 0920-3796 |
| DOI | 10.1016/j.fusengdes.2021.112682 |
| 通讯作者 | Ye, Minyou(yemy@ustc.edu.cn) |
| 英文摘要 | Tungsten (W) as plasma facing material (PFM) has been used in ITER divertor. Many experiments indicate that due to helium (He) ion irradiation the thermal conductivities (TCs) of W can be significantly reduced. In this work, the lattice thermal transport property is studied based on the non-equilibrium molecular dynamics (NEMD) method. Firstly, the Kapitza resistance of grain boundaries (GBs) in W is obtained. It can be confirmed that the Kapitza resistance is positively correlated with GB energies, which reflect the lattice distortion degree in a sense. The result indicates that the distortion energy may play a key role in the thermal properties. Further simulation is performed to study the thermal resistance of GBs with nano He bubble. When the number of He atoms in bubble is less than a value, the thermal resistances are stable and change little. It implies that the effect of GBs is more significant than He bubble to block phonons diffusion. With the number of He atoms increasing, the property of heat conduction deteriorates further because the coupling of He bubble and GBs change the lattice distortion degree. |
| WOS关键词 | CONDUCTIVITY |
| 资助项目 | National Key Research and Development Program of China[2017YFA0402504] ; National Natural Science Foundation of China[11975232] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP015] ; Supercomputing Center of University of Science and Technology of China |
| WOS研究方向 | Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000670075800006 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Supercomputing Center of University of Science and Technology of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/123439]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Ye, Minyou |
| 作者单位 | 1.Chinese Acad Sci, Inst Solid State Phys, 350 Shushanhu Rd, Hefei, Peoples R China 2.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, Yingmei,Wu, Xuebang,Zhan, Jie,et al. Simulation study of effects of grain boundary and helium bubble on lattice thermal resistance of tungsten[J]. FUSION ENGINEERING AND DESIGN,2021,168. |
| APA | Ding, Yingmei,Wu, Xuebang,Zhan, Jie,Chen, Ze,Mao, Shifeng,&Ye, Minyou.(2021).Simulation study of effects of grain boundary and helium bubble on lattice thermal resistance of tungsten.FUSION ENGINEERING AND DESIGN,168. |
| MLA | Ding, Yingmei,et al."Simulation study of effects of grain boundary and helium bubble on lattice thermal resistance of tungsten".FUSION ENGINEERING AND DESIGN 168(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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