The high-flux effect on deuterium retention in TiC and TaC doped tungsten at high temperatures

TitleThe high-flux effect on deuterium retention in TiC and TaC doped tungsten at high temperatures
Publication TypeJournal Article
Year of Publication2017
AuthorsM. Zibrov, K. Bystrov, M. Mayer, T.W Morgan, H. Kurishita
JournalJournal of Nuclear Materials
Volume494
Pagination211-218
Date Published10/2017
Abstract

Samples made of tungsten (W) doped either with titanium carbide (W-1.1TiC) or tantalum carbide (W-3.3TaC) were exposed to a low-energy (40 eV/D), high-flux (1.8–5 × 1023 D/m2s) deuterium (D) plasma at temperatures of about800 K, 1050 K, and 1250 K to a fluence of about1 × 1027 D/m2. The deuterium (D) inventory in the samples was examined by nuclear reaction analysis and thermal desorption spectroscopy. At 800 K the D bulk concentrations and total D inventories in W-1.1TiC and W-3.3TaC were more than one order of magnitude higher compared to that in pure polycrystalline W. At 1050 K and 1250 K the D concentrations in all types of samples were very low (≤10−5 at. fr.); however the D inventories in W-1.1TiC were significantly higher compared to those in W-3.3TaC and pure W. It is suggested that D trapping inside the carbide precipitates and at their boundaries is essential at high temperatures and high incident fluxes, especially in W-1.1TiC.

DOI10.1016/j.jnucmat.2017.07.028
Division

PSI

Department

PMI

PID

bf7c805baaa90502fb190c9ea9fd7fd3

Alternate TitleJ. Nucl. Mater.

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