首页|Effect of rhenium addition on deuterium retention in neutron-irradiated tungsten
Effect of rhenium addition on deuterium retention in neutron-irradiated tungsten
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NSTL
Elsevier
The effects of rhenium (Re) addition on deuterium (D) retention in neutron-irradiated tungsten (W) were investigated. Pure W and W-5Re (5 at.%) alloy samples were irradiated with neutrons at High Flux Iso-tope Reactor using MFE-RB-19 J capsule. The sample temperature and the damage level were 864 K and 0.35 dpa for pure W and 792 K and 0.26 dpa for W-5Re alloy. A portion of the samples was ex-posed to D plasma at Tritium Plasma Experiment at Idaho National Laboratory at 823 K to a fluence of 5 x 10 25 m(-2). Vacancy-type defects in neutron-irradiated samples were examined using positron an-nihilation spectroscopy (PAS); D retention after plasma exposure was evaluated by thermal desorption spectrometry (TDS). TDS measurements revealed that D retention in the neutron-irradiated W-5Re alloy was similar to that in the unirradiated W sample, whereas a significant increase in D retention was observed in neutron-irradiated W. Thus, Re addition significantly suppressed the increase in D retention after neutron irradi-ation. This effect was attributed to the suppression of vacancy-type defect formation, as confirmed by PAS. (C) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier
