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Study on influence factors of permeation reduction factor of Al2O3-hydrogen isotopes permeation barriers.
- Source :
-
International Journal of Hydrogen Energy . Feb2016, Vol. 41 Issue 7, p4326-4331. 6p. - Publication Year :
- 2016
-
Abstract
- Hydrogen isotopes permeation barriers (HIPB) play an important role in reducing hydrogen isotopes permeation and leakage in hydrogen energy and thermonuclear fusion energy. In this study, the Al 2 O 3 -HIPB were prepared on 316L stainless steel by RF magnetron sputtering. The impacts of coating thickness and annealing temperature of as-deposited coatings on deuterium permeation reduction factor (D-PRF) are studied in detail. With increasing thickness of coatings from 0.2 μm to 1.6 μm, the D-PRF did not rise significantly, which indicated that coating surface, for thin coatings, played more important role in impeding deuterium permeation than coating interior. As a result of further crystallization and grain growth, the 700 °C-annealed Al 2 O 3 coatings had stronger ability to impede deuterium permeation than 600 °C-annealed Al 2 O 3 coatings. This further proofs that grain boundaries may be a short-cut path for deuterium diffusion in Al 2 O 3 coatings. The D-PRF drastically decreased when the annealing temperature reaches 800 °C, which might be ascribed to the new phases form and the coating cracks appearance after 800 °C annealing. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 41
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 113281502
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2016.01.018