Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4921253 | Fusion Engineering and Design | 2017 | 6 Pages |
Abstract
Effects of helium plasma irradiation on spark plasma sintering (SPS) W-K, pure W and traditionally sintered commercial W-K have been studied, concerning the density, grain size and potassium content as the influence factors. Pinholes are formed under 120 eV He ions at 600 °C and 1 Ã 1023 mâ2 fluence on the surface of all samples. It is found that SPS-sintered W-K shows the best irradiation resistance among the present samples, and SPS-sintered pure W exhibits higher irradiation tolerance than commercial W-K. Different He-plasma tolerance was observed among the SPS-sintered W-K samples due to varied potassium content and grain size. In addition, the microstructure evolution under helium irradiation, the growth-migration of helium bubbles and their interactions of potassium bubbles have also been discussed.
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Authors
Xiaoyan Shu, Bo Huang, Dongping Liu, Hongyu Fan, Ning Liu, Jun Tang,