Hydrogen trapping under the effect of W-C mixed layers
文献类型：期刊论文
| 作者 | Liu, N.1; Huang, J.2; Sato, K.3; Xu, Q.3; Shi, L. Q.1; Wang, Y. X.1 |
| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2014-03-01 |
| 卷号 | 54 |
| 关键词 | Plasma-facing Materials C-w Mixed Layer h Retention Density Functional Theory |
| ISSN号 | 0029-5515 |
| DOI | 10.1088/0029-5515/54/3/033013 |
| 文献子类 | Article |
| 英文摘要 | The retention of hydrogen (H) isotope in plasma-facing materials (PFMs) is an important issue for next step fusion device. We used density functional theory (DFT) to study the chemical bonds of H in tungsten-carbon (W-C) mixed layers of tungsten surface, aiming to explore the retention behaviour of H in PFMs. The solubility of C in W was first calculated for revealing the phase components in W-C mixed layers. It was found that C has low solubility in W, which prefers to be segregated on the W surface. Vacancies can enhance the solution of C in W. This makes C appear somewhat carbide feature. Thus, W-C mixed layers should contain multiple phase components. H retention strongly depends on the phase components in the W-C mixed layers. The solution of C will suppress the retention of H in W no matter whether neighbouring vacancies are present, or not. Hydrocarbon precursors, which were observed in desorption experiments, prefer to form by means of H binding to C atoms in C amorphous, or in precipitators in the W-C mixed layers, while not in tungsten carbide phase or in W bulk. Our investigation reasonably explains the experimental results. |
| WOS关键词 | DEUTERIUM RETENTION ; TUNGSTEN ; CARBON ; PLASMA ; CODEPOSITION ; EROSION ; DISCHARGE ; TEXTOR-94 |
| 语种 | 英语 |
| WOS记录号 | WOS:000332022800014 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.100.186/handle/113462/49609]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Liu, N. |
| 作者单位 | 1.Fudan Univ, Inst Modern Phys, Appl Ion Beam Phys Lab, Shanghai 200433, Peoples R China 2.Fudan Univ, Dept Mech & Sci Engn, Shanghai 200433, Peoples R China 3.Kyoto Univ, Inst Res Reactor, Osaka 5900494, Japan |
| 推荐引用方式 GB/T 7714 | Liu, N.,Huang, J.,Sato, K.,et al. Hydrogen trapping under the effect of W-C mixed layers[J]. NUCLEAR FUSION,2014,54. |
| APA | Liu, N.,Huang, J.,Sato, K.,Xu, Q.,Shi, L. Q.,&Wang, Y. X..(2014).Hydrogen trapping under the effect of W-C mixed layers.NUCLEAR FUSION,54. |
| MLA | Liu, N.,et al."Hydrogen trapping under the effect of W-C mixed layers".NUCLEAR FUSION 54(2014). |
入库方式： OAI收割
来源：近代物理研究所
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