Deuterium retention in rhenium-doped tungsten

JOURNAL OF NUCLEAR MATERIALS

卷:363

Article; Proceedings Paper

Golubeva, A. V. ; Mayer, M. ; Roth, J. ; Kurnaev, V. A. ; Ogorodnikova, O. V.

关键词: deuterium inventory;    retention;    tungsten;   

DOI  :  10.1016/j.jnucmat.2007.01.110

来源: Elsevier

【 摘 要 】

Deuterium retention in rhenium doped tungsten (W-Re) was investigated by means of the thermodesorption technique. W-Re alloys of different structures and concentrations of Re were investigated. All tungsten rhenium alloys had a common structural feature - micron size voids in the bulk. The samples were irradiated by 200 eV deuterium ions in the fluence range 10(22)-10(24) D/m(2). The thermodesorption spectra of polycrystalline W measured with a linear ramp of 5 K/s has two peaks at similar to 450 and 650 K. In TDS of W-Re alloys an additional high-temperature peak was found at 850 K. The observed retention in W-Re alloys depends strongly on materials structure. In the range of 1-10%Re admixture the Re concentration in W-Re alloy does not influence noticeably the deuterium retention. Structure changes (filling of voids in material) was found to take place both at annealing and low-energy deuterium irradiation. (c) 2007 Elsevier B.V. All rights reserved.

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