Research Status and Trend of Ultra-precision Polishing on Tungsten Surface for Fusion Reactors

doi:10.3901/JME.2020.21.011

Abstract

Abstract: Tungsten, as the most promising plasma facing material in the future fusion reactor, will withstand the irradiation impact of high energy particles under reactor condition. The surface quality of material will directly affect the hydrogen/helium retention behavior and the degree of radiation damage, thus affecting the safety and reliability of fusion reactor. At the present stage, the research on irradiation resistance modification of tungsten mainly focuses on the composition, structure and organization design of the material, few studies have been proceeded on the irradiation resistance modification of material surface. Focusing on the frontier scientific problems, the study intends to analyze the scientific problems in the field of nuclear materials from the perspective of mechanical processing, describes the necessity of ultra-precision polishing on the tungsten surface for nuclear fusion reactor based on the domestic and international research results and machining status of tungsten for nuclear fusion (PFM-W). Through comparing with different polishing methods, the viewpoint that magneto-rheological finishing and force-induced rheological polishing are more suitable for ultra-precision polishing of PFM-W surface. In addition, the future research trend of ultra-precision polishing of PFM-W surface is analyzed, with emphasis on the exploration of the polishing method and the influence of the surface quality of the polished material on the radiation resistance.

Key words: tungsten, ultra-precision polishing, surface quality, radiation resistance

CLC Number:

TH161

CHEN Hongyu, YUAN Julong, Lü Binghai, LUO Laima, WU Yucheng. Research Status and Trend of Ultra-precision Polishing on Tungsten Surface for Fusion Reactors[J]. Journal of Mechanical Engineering, 2020, 56(21): 11-21.

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