1. Surface morphology and deuterium retention in tungsten and tungsten–rhenium alloy exposed to low-energy, high flux D plasma.
- Author
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Alimov, V.Kh., Hatano, Y., Sugiyama, K., Balden, M., Oyaidzu, M., Akamaru, S., Tada, K., Kurishita, H., Hayashi, T., and Matsuyama, M.
- Subjects
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TUNGSTEN-rhenium alloys , *SURFACE morphology , *DEUTERIUM , *PLASMA gases , *SURFACE topography , *NUCLEAR reactions - Abstract
Surface topography and deuterium retention in polycrystalline hot-rolled W and W–5%Re have been examined after exposure to a low-energy (76 eV), high flux (around 10 22 D/m 2 s) deuterium plasma to an ion fluence of 10 26 D/m 2 at various temperatures. The methods used were confocal laser scanning microscopy and the D( 3 He, p) 4 He nuclear reaction at 3 He energies varied from 0.69 to 4.0 MeV. During exposure to the D plasma at temperatures in the range from 348 to 673 K, small blisters of size in the range from about 1 to about 15 μm, depending on the exposure temperature, are formed on the W and W–5%Re surfaces. In the W–5%Re, the deuterium retention demonstrates its maximum at exposure temperature of 463 K, while in the W this maximum is shifted to 523 K. A difference in the temperature dependence of the D retention for the W and W–5%Re is explained, as a rough approximation, by temperature dependences of the ductility of these materials. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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