In:
Chinese Physics B, IOP Publishing, Vol. 29, No. 6 ( 2020-06-01), p. 065205-
Kurzfassung:
The retention and release of deuterium in W–2%Y 2 O 3 composite materials and commercially pure tungsten after they have been implanted by deuterium plasma (flux ∼ 3.71 × 10 21 D/m 2 ⋅s, energy ∼ 25 eV, and fluence up to 1.3 × 10 26 D/m 2 ) are studied. The results show that the total amount of deuterium released from W–2%Y 2 O 3 is 5.23 × 10 20 D/m 2 (2.5 K/min), about 2.5 times higher than that from the pure tungsten. Thermal desorption spectra (TDS) at different heating rates (2.5 K/min–20 K/min) reveal that both W and W–2%Y 2 O 3 have two main deuterium trapped sites. For the low temperature trap, the deuterium desorption activation energy is 0.85 eV (grain boundary) in W, while for high temperature trap, the desorption activation energy is 1.57 eV (vacancy) in W and 1.73 eV (vacancy) in W–2%Y 2 O 3 .
Materialart:
Online-Ressource
ISSN:
1674-1056
DOI:
10.1088/1674-1056/ab8204
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2020
ZDB Id:
2412147-2
Permalink