[2G11-16] Functional Material

[2G15] Development of potassium doped tungsten thick plates for fusion reactors

(1) Overview of R&D and effectiveness of potassium doping

*Shuhei Nogami¹, Akira Hasegawa², Naoya Matsuta¹, Kei Miura¹, Shigekazu Yamazaki¹, Seiji Nakabayashi¹, Tomohiro Takida¹ (1. A.L.M.T., 2. Tohoku Univ.)

Keywords:Tungsten, Potassium doping, Low-temperature brittleness, Recrystallization embrittlement, Neutron irradiation embrittlement

Tungsten material used in fusion DEMO and beyond requires the improvement of low-temperature brittleness and suppression of recrystallization embrittlement and neutron irradiation embrittlement. In this study, potassium-doped tungsten plates with an appropriate thickness of fusion reactor divertors have been developed, which can overcome these issues. In this presentation, the overview of R&D, especially focusing on the effectiveness of potassium doping in addressing these issues, will be reported.