METALS AND METAL MATRIX COMPOSITES |
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Effects of Tungsten Transmutation Elements Rhenium and Osmium on Properties of Tungsten Material as the Plasma-facing Materials for Fusion Devices |
WU Boyu1,2, XU Yuping2, LYU Yiming2,3, LU Peng2, LI Xiaochun2, ZHOU Haishan2, LIU Songlin2, LUO Guangnan2,3
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1 Institute of Materials Science and Information Technology, Anhui University, Hefei 230039, China 2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 3 Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China |
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Abstract Tungsten (W) is considered to be the most promising plasma-facing material for fusion devices, because of its excellent properties such as high melting point, high density, low thermal expansion coefficient, low tritium retention, and low sputtering yield. 14 MeV neutrons from the D-T fusion reaction will lead to the generation of transmutation elements Rhenium (Re) and Osmium (Os). With the service time increases, the transmutation elements will accumulate. These two transmutation elements are bound to affect the microstructure of the tungsten and thus affect the performance of tungsten material. In this work, the effects of tungsten transmutation elements Re and Os on the properties of fusion device plasma-facing tungsten material were summarized, including mechanical properties, anti-irradiation properties, thermal properties, and hydrogen isotope transport behavior in tungsten. The results show that the Re and Os can make a huge change in the properties of tungsten materials. However, the relevant research is currently trivial. In the future, more systematic conclusions are needed to fully evaluate the performance of fusion device plasma-facing tungsten material under irradiation.
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Published: 19 January 2021
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Fund:This work was financially supported by National MCF Energy R&D Program of China (2018YFE0308102), the National Natural Science Foundation of China(11905246,11975260), Users with Excellence Project of Hefei Science Center CAS (2018HSC-UE006). |
About author:: Boyu Wu received his B.E. degree in materials science and engineering from Shanghai Polytechnic University in 2019. He is currently pursuing his M.S. at the Institute of Materials Science and Information Technology, Anhui University under the supervision of researcher Guangnan Luo and assistant researcher Yuping Xu. His research has focused on the effects of tungsten transmutation elements on transport of hydrogen isotopes in tungsten. Yuping Xu received his B.E. degree from Northwestern Polytechnical University in 2012 and received his Ph.D. degree in nuclear energy science and engineering from the Science Island Branch of Graduate School, University of Science and Technology of China, in 2017. After two-year postdoctoral research at the Institute of Plasma Physics under the support of National Postdoctoral Innovative Talent Support Program, he is currently an assistant researcher in the Institute of Plasma Physics, Chinese Academy of Sciences. He has been researching on the interaction between fusion materials and hydrogen isotopes. As the first author/correspon-ding author, he has published more than 10 papers in professional journals of fusion field, including Nuclear Fusion, Journal of Nuclear Materials, etc. |
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