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Title:: Material Selection and Research Progress of Divertor Target Plate in Nuclear Fusion Device

Author(s):: WU Yucheng; SHENG Xueyang; MA Bing; WANG Shan; ZHANG Yifan; LIU Jiaqin; 1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 2. National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei University of Technology, Hefei 230009, China et al.

Keywords:: nuclear fusion energy; metal beryllium; carbon-based material; tungstenbased material; divertor target plate material

Abstract:: As a safe and sustainable clean energy, controllable thermonuclear fusion energy is an ideal energy to meet the needs of human beings in the future. At present, the engineering and commercial application of nuclear fusion energy still faces many technical problems. Among them, the design and manufacture of the divertor target plate, an important component in the nuclear fusion device, is one of the key problems that need to be solved urgently to realize the stable operation of the nuclear fusion reactor. The divertor target plate is the most intense area of plasma bombardment. It is subjected to huge particle irradiation with high flux and high thermal load impact. Besides, the divertor undertakes the main heat removal function of the tokamak device, with extremely harsh service environment. Therefore, the research and development of divertor target materials with excellent performance is a key step to promote nuclear fusion research to practicality. At present, metal beryllium, carbon-based materials and tungsten-based materials are the main three divertor target materials. This paper discusses the selection and research progress of these materials, comparing and analyzing the advantages and disadvantages of various materials used in the divertor target plate as well as the existing technical problems. The aim is to provide a reference for promoting the design and manufacture of the divertor target plate.