期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 686, 期 -, 页码 298-305出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.05.010
关键词
Potassium-doped tungsten; Yttrium; SPS sintering; Thermal shock
资金
- International Thermonuclear Experimental Reactor (ITER) Program Special [2011GB108005]
- National Natural Science Foundation of China [11475118]
- National Fund of China for Fostering Talents in Basic Science [J1210004]
Novel tungsten-based W-K-Y alloys were sintered by spark plasma sintering (SPS) method using fine-grained yttrium doped tungsten-potassium (W-K) powder. The relative density, microstructure, hardness and the resistance to thermal shock damage of the sintered samples were characterized. With the enhanced Y doping, the grain size decreased and the hardness increased. Thermal shock test under 0.37 GW/m(2) heat load showed that low yttrium doping (0.05 wt%, 0.1 wt% and 0.5 wt%) in W-K-Y alloys can improve the resistance to thermal shock damage comparing with traditional commercial W-K, while high yttrium doping (1 wt%) easily leads to crack formation. This study will provide helpful information to optimize the preparation of tungsten-based plasma facing materials through composite tuning. (C) 2016 Elsevier B.V. All rights reserved.
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