Deuterium retention in W and W-Re alloy irradiated with high energy Fe and W ions: Effects of irradiation temperature

Nuclear Materials and Energy

Y. Oya¹  Y. Hatano²  K. Ami²  V.Kh. Alimov²  S. Kondo³  T. Hinoki³  T. Toyama⁴  K. Sugiyama⁵  M. Fukuda⁶  A. Hasegawa⁶  T. Hayashi⁷  M. Oyaidzu⁷ 

[1] College of Science, Academic Institute, Shizuoka University, Shizuoka 422-8529, Japan;Hydrogen Isotope Research Center, Organization for Promotion of Research, University of Toyama, Toyama 930-8555, Japan;Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan;Intitute for Materials Research, Tohoku University, Oarai 311-1313, Japan;Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany;School of Engineering, Tohoku University, Sendai 980-8579, Japan;Sector of Fusion Research and Development, Japan Atomic Energy Agency, Rokkasho 039-3212, Japan;

关键词: Tungsten;    Tungsten-rhenium alloy;    Irradiation;    Defect;    Trap;    Hydrogen;    Hydrogen isotope;   

DOI  :  10.1016/j.nme.2016.06.016

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown