Ablation behavior of tungsten alloys under high-energy electron irradiation
In order to investigate ablation behavior caused by runaway electrons on plasma facing materials (PFMs), the high energy electron irradiation experiment with a pulse duration of 0.6 µ s at room temperature was performed. Specimens of ITER-grade tungsten (W), W-0.5 wt% ZrC alloy (WZC) and potassium-d...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/adeb9a |
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| author | Yiyi Ma Shangming Chen Lei Peng Yongjie Sun Jingyi Shi Chengjun Zhu Zhenyu Wei Pengfei Zheng Rui Liu Wei Jiang HuiJuan Wang |
| author_facet | Yiyi Ma Shangming Chen Lei Peng Yongjie Sun Jingyi Shi Chengjun Zhu Zhenyu Wei Pengfei Zheng Rui Liu Wei Jiang HuiJuan Wang |
| author_sort | Yiyi Ma |
| collection | DOAJ |
| description | In order to investigate ablation behavior caused by runaway electrons on plasma facing materials (PFMs), the high energy electron irradiation experiment with a pulse duration of 0.6 µ s at room temperature was performed. Specimens of ITER-grade tungsten (W), W-0.5 wt% ZrC alloy (WZC) and potassium-doped tungsten alloy (W–K) were irradiated at different average energy densities. The results indicate that the radial patterns of corrugated and strip-like bulge products on the irradiated specimens’ surfaces are due to the high energy electron pressure. The average void radius, void number density, area and area number density of bulge products on the surface increase with the average energy density in W and W alloys. Second phase particles add more nucleation sites, making void formation and growth easier in W alloys. WZC and W–K have higher average void number density than W. Voids in W alloys, doping of ZrC particles and the fibrous structure of W–K could help enhance heat dissipation and reduce the height of molten layer thickness. Compared to W alloys, W not only has higher area number density and larger area ratio of bulge products on the surface but also exhibits more droplets and larger droplets dimensions. Higher thermal conductivity of W contributes to the higher average molten layer thickness. |
| format | Article |
| id | doaj-art-809f2d68ccaf4a2a9cb669c1e2be5da5 |
| institution | Matheson Library |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-809f2d68ccaf4a2a9cb669c1e2be5da52025-07-15T09:07:47ZengIOP PublishingNuclear Fusion0029-55152025-01-0165808601810.1088/1741-4326/adeb9aAblation behavior of tungsten alloys under high-energy electron irradiationYiyi Ma0Shangming Chen1Lei Peng2https://orcid.org/0000-0002-4029-7801Yongjie Sun3https://orcid.org/0009-0003-7691-8176Jingyi Shi4Chengjun Zhu5Zhenyu Wei6Pengfei Zheng7Rui Liu8Wei Jiang9HuiJuan Wang10School of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230027, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences , Hefei 230031, ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of China , Hefei 230029, ChinaExperimental Center of Engineering and Materia Science, University of Science and Technology of China , Hefei 230026, ChinaIn order to investigate ablation behavior caused by runaway electrons on plasma facing materials (PFMs), the high energy electron irradiation experiment with a pulse duration of 0.6 µ s at room temperature was performed. Specimens of ITER-grade tungsten (W), W-0.5 wt% ZrC alloy (WZC) and potassium-doped tungsten alloy (W–K) were irradiated at different average energy densities. The results indicate that the radial patterns of corrugated and strip-like bulge products on the irradiated specimens’ surfaces are due to the high energy electron pressure. The average void radius, void number density, area and area number density of bulge products on the surface increase with the average energy density in W and W alloys. Second phase particles add more nucleation sites, making void formation and growth easier in W alloys. WZC and W–K have higher average void number density than W. Voids in W alloys, doping of ZrC particles and the fibrous structure of W–K could help enhance heat dissipation and reduce the height of molten layer thickness. Compared to W alloys, W not only has higher area number density and larger area ratio of bulge products on the surface but also exhibits more droplets and larger droplets dimensions. Higher thermal conductivity of W contributes to the higher average molten layer thickness.https://doi.org/10.1088/1741-4326/adeb9atungstenhigh energy electronablation behaviorrunaway electron |
| spellingShingle | Yiyi Ma Shangming Chen Lei Peng Yongjie Sun Jingyi Shi Chengjun Zhu Zhenyu Wei Pengfei Zheng Rui Liu Wei Jiang HuiJuan Wang Ablation behavior of tungsten alloys under high-energy electron irradiation Nuclear Fusion tungsten high energy electron ablation behavior runaway electron |
| title | Ablation behavior of tungsten alloys under high-energy electron irradiation |
| title_full | Ablation behavior of tungsten alloys under high-energy electron irradiation |
| title_fullStr | Ablation behavior of tungsten alloys under high-energy electron irradiation |
| title_full_unstemmed | Ablation behavior of tungsten alloys under high-energy electron irradiation |
| title_short | Ablation behavior of tungsten alloys under high-energy electron irradiation |
| title_sort | ablation behavior of tungsten alloys under high energy electron irradiation |
| topic | tungsten high energy electron ablation behavior runaway electron |
| url | https://doi.org/10.1088/1741-4326/adeb9a |
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