Abstract
The permeation rate of deuterium through high-purity beryllium membranes was measured using the gas-driven permeation technique. The time-dependent and the steady-state deuterium flux data were analyzed and the effective diffusivities of the samples were determined. Using multilayer permeation theory the effects of surface oxide were eliminated and the diffusion coefficients of the bulk beryllium determined. The diffusion parameters obtained for the extra-grade beryllium samples (99.8%) are D0 = 6.7 × 10-9 m2/s and ED = 28.4 kJ/mol. For the high-grade beryllium samples (99%) the parameters are D0 = 8.0 × 10-9 m2/s and ED = 35.1 kJ/mol.
Original language | English |
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Pages (from-to) | 90-95 |
Number of pages | 6 |
Journal | Journal of Nuclear Materials |
Volume | 175 |
Issue number | 1-2 |
DOIs | |
State | Published - 1 Dec 1990 |
Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- General Materials Science
- Nuclear Energy and Engineering