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Combined effect of laser thermal shock and helium ion irradiation on W-Y2O3 composites.
- Source :
-
Fusion Engineering & Design . Mar2019, Vol. 140, p102-106. 5p. - Publication Year :
- 2019
-
Abstract
- Highlights • Thermal shock behavior of samples was characterized after helium irradiation. • Combined helium irradiation and thermal shock has significant influence on crack propagation. • Observing fuzz was more likely to converge densely at the phase interface. • Y 2 O 3 doping can improve thermal shock resistance of the W-Y 2 O 3 composite. Abstract Tungsten can be the preferred plasma-facing material for nuclear fusion reaction. In this work, W-Y 2 O 3 composite powder was successfully fabricated through the wet chemical method, and bulk materials were obtained by rolling and high temperature annealing. W-2 vol% Y 2 O 3 was exposed to 80 eV helium ion irradiation with a flux of 1.5 × 1022 ions/(m2·s) at 1503–1553 K to assess its thermal shock resistance and helium ion irradiation damage behavior. The thermal shock behaviors of samples were studied under a laser beam. The energy densities of the laser thermal shock were 0.32, 0.48, and 0.64 GW/m2. W-Y 2 O 3 was compared with commercial pure tungsten. The hardness of pure tungsten and W-Y 2 O 3 before and after helium irradiation was measured by using a micro-hardness tester. The surface micrograph after helium ion irradiation and thermal shock was observed through scanning electron microscopy. Results show that W-Y 2 O 3 composite materials have better resistance to laser thermal shock than pure tungsten. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09203796
- Volume :
- 140
- Database :
- Academic Search Index
- Journal :
- Fusion Engineering & Design
- Publication Type :
- Academic Journal
- Accession number :
- 134904996
- Full Text :
- https://doi.org/10.1016/j.fusengdes.2019.01.134