| Autor: |
Y. Hatano, K. Ami, V.Kh. Alimov, S. Kondo, T. Hinoki, T. Toyama, M. Fukuda, A. Hasegawa, K. Sugiyama, Y. Oya, M. Oyaidzu, T. Hayashi |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Nuclear Materials and Energy, Vol 9, Iss C, Pp 93-97 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
2352-1791 |
| DOI: |
10.1016/j.nme.2016.06.016 |
| Popis: |
Neutron irradiation to W induces defects acting as traps against hydrogen isotopes and transmutation elements such as Re and Os. To investigate synergetic effects on radiation-induced defects and Re, deuterium (D) retention in W and W–5% Re samples were examined after irradiation with 6.4MeV Fe ions at 523–1273K followed by exposure to D2 gas at 673K. The value of D retention in W–5% Re was lower than that in W by orders of magnitude after the irradiation at high temperatures (≥1073K), while no significant effects of Re addition was observed after irradiation at 523K. Irradiation with 20MeV W ions at room temperature followed by exposure to D plasma at 443–743K also resulted in small difference in D retention between W and W–5% Re samples. The results of positron lifetime measurements showed that the reduced D retention by Re observed after high temperature irradiation was due to suppression of formation of vacancy-type defects (monovacancies and vacancy clusters) by Re. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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