Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 463, Issue -, Pages 272-275Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2014.11.044
Keywords
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Funding
- EFDA-Power Plant Physics Technology [WP12-PEX-03a-T03-01/IPP]
- European Union's Horizon 2020 research and innovation programme [633053]
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Fe-W binary mixed layers were prepared as a model system for reduced-activation ferritic-martensitic (RAFM) steel for studying their dynamic erosion behavior resulting from energetic deuterium (D) irradiation. This investigation aims toward an assessment of RAFM steels as plasma-facing material. The surface composition of the model layers is modified by D irradiation. W is enriched at the surface with D irradiation fluence due to the preferential sputtering of Fe. It depends on the D impinging energy as well as the initial W fraction of the Fe-W layer. No significant development of surface topography was observed within the examined conditions. The erosion yield of a Fe-W layer is comparable to that of pure Fe in the low-fluence range and decreases with increasing D fluence. These results indicate that the dynamic change of erosion yield is significantly correlated with the surface W enrichment. (C) 2014 Elsevier B.V. All rights reserved.
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