Preparation of first wall material of fusion reactor-W-K and preliminary study of its damage resistance to accelerator protons

【作者】 黄波； Xiaoyan Shu； 杨吉军； 杨远友； 廖家莉； 刘宁； 唐军；

【Author】 Bo Huang;Xiaoyan Shu;Jijun Yang;Yuanyou Yang;Jiali Liao;Ning Liu;Jun Tang;Key Laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University;

【机构】 辐射物理与技术教育部重点实验室,四川大学原子核科学技术研究所；

【摘要】 Fine-grained micro-potassium doped tungsten samples were synthesized by spark-plasma-sintering(SPS)method using tungsten-potassium(W-K)mixed powder.The potassium content,microstructure and density of the sintered samples were measured.It is found that both sintering temperature and pressure play important roles to obtain high-density and fine-grain sample.By one step sintering method,the relative density(95.6%)of the sample is largely improved than those of the commercial W-K(91.74%)at similar grain size.Through two-step sintering,its grain size becomes smaller and more homogenous than that of the commercial one while showing similar density.The damage resistance to accelerator protons of the samples was also investigated.This study will provide a novel way to synthesize high-density/fine-grain plasma facing material W-K.更多还原

【Abstract】 Fine-grained micro-potassium doped tungsten samples were synthesized by spark-plasma-sintering(SPS) method using tungsten-potassium(W-K) mixed powder.The potassium content,microstructure and density of the sintered samples were measured.It is found that both sintering temperature and pressure play important roles to obtain high-density and fine-grain sample.By one step sintering method,the relative density(95.6%) of the sample is largely improved than those of the commercial W-K(91.74%) at similar grain size.Through two-step sintering,its grain size becomes smaller and more homogenous than that of the commercial one while showing similar density.The damage resistance to accelerator protons of the samples was also investigated.This study will provide a novel way to synthesize high-density/fine-grain plasma facing material W-K.更多还原