氦离子辐照对纯钨表层纳米压痕硬度的影响
文献类型：期刊论文
| 作者 | Wei, Shaohong,,; Chen, Huaican,; Yuan, Ye ; Yin, Wen,; Ji, Quan; Zhao, Hailong
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| 刊名 | 稀有金属
 |
| 出版日期 | 2022 |
| 卷号 | 46期号:11页码:1520-1525 |
| ISSN号 | 02587076 |
| DOI | 10.13373/j.cnki.cjrm.XY21070022 |
| 文献子类 | Article |
| 英文摘要 | Due to its high density, high melting point and high thermal conductivity, tungsten is used as a solid target material for spallation neutron source, such as UK spallation neutron source (ISIS) and China spallation neutron source (CSNS). Proton and neutron irradiation will produce a large amount of helium in tungsten, helium is easy to be trapped by vacancy, dislocation and other defects in the target material, forming clusters, and then forming helium bubbles. one of the most important research focuses on the irradiation effect of tungsten is the behavior of helium and the effect of helium on the mechanical properties of materials. In this study, the effects of irradiation and the introduction of helium bubbles on the mechanical properties of tungsten matrix were simulated by helium ion implantation. Helium ion implantation was carried out on high purity tungsten at room temperature. The helium ion energy was 350 keV and the implantation dose was 1×1016, 5×1016 and 1×1017 ions·cm-2. Monte Carlo code SRIM-2011 was used to simulate the implantation depth, helium concentration and irradiation damage of helium ion implanted tungsten. SRIM simulation results showed that the maximum implantation depth of 350 keV helium ion in tungsten was about 1 µm, the maximum helium ion concentration was 5.1% (atom fraction) at 650 nm. The hardness changes of tungsten before and after helium implantation were characterized by nano-indentation technique. The maximum irradiation damage of tungsten was 0.9 dpa when the helium ion implantation dose was 1×1017 ions·cm-2. Nano-indentation hardness test results showed that irradiation hardening occurred after He ion implantation, before helium ion implantation, the nano indentation hardness of tungsten surface was 6.87 GPa, after helium ion implantation, the nano indentation hardness of tungsten sample surface increased, and increased with the increase of helium ion implantation dose, when the implantation dose was 1×1017 ions·cm-2, the nano indentation hardness reached the maximum of 8.55 GPa. The nano-indentation hardness values of the three samples with different injection doses first increased and then decreased with the measurement depth. The increase of nano-indentation hardness was directly related to the introduction of helium bubbles, after helium ion implantation, helium diffused and accumulated in the material, the defect concentration in the material increased and the hardness increased. The microstructure of tungsten sample surface at about 600 nm depth without and after helium ion implantation was observed by transmission electron microscope (TEM), TEM samples were prepared by focused ion beam (FIB). TEM results showed that no helium bubbles were observed in the tungsten matrix without ion implantation, and helium bubbles were found in the tungsten matrix after different doses of helium ion implantation, helium bubble density increased with the increase of helium ion implantation dose, moreover, within a certain depth range of the surface layer, the helium bubble density increased with the increase of depth. © 2022, Youke Publishing Co., Ltd. All right reserved. |
| 语种 | 中文 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/300535]  |
| 专题 | 高能物理研究所_东莞分部 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wei, Shaohong,,,Chen, Huaican,,Yuan, Ye,等. 氦离子辐照对纯钨表层纳米压痕硬度的影响[J]. 稀有金属,2022,46(11):1520-1525. |
| APA | Wei, Shaohong,,,Chen, Huaican,,Yuan, Ye,Yin, Wen,,Ji, Quan,&Zhao, Hailong.(2022).氦离子辐照对纯钨表层纳米压痕硬度的影响.稀有金属,46(11),1520-1525. |
| MLA | Wei, Shaohong,,,et al."氦离子辐照对纯钨表层纳米压痕硬度的影响".稀有金属 46.11(2022):1520-1525. |
入库方式： OAI收割
来源：高能物理研究所
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