Measurements of the erosion of stainless steel, carbon, and SiC by hydrogen bombardment in the energy range of 0.5 – 7.5 keV |
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Authors: | R Behrisch J Bohdansky GH Oetjen J Roth G Schilling H Verbeek |
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Affiliation: | Max-Planck-Institut für Plasmaphysik, EURATOM-Association, 8046 Garching b., München, Fed. Rep. Germany |
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Abstract: | Total erosion yields by sputtering and blistering for 1 to 15 keV H2+ bombardment at normal incidence have been measured by weight loss of 304 stainless steel, pyrolytic graphite, carbon fibres, glassy carbon and SiC. The erosion yields are in the range of 3 × 10?3 to 2.6 × 10?2 atoms per incident hydrogen atom. Observation in the scanning electron microscope shows that blisters occur in stainless steel and SiC at doses of 5 × 1018 particles/cm2, but disappear at doses of 5 × 10 particles/cm2 . The surface roughening observed depends largely on grain orientation. On carbon no blistering could be found. After bombardment the carbon surfaces are generally more smooth than before. |
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