Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6746146 | Fusion Engineering and Design | 2015 | 5 Pages |
Abstract
Beryllium (Be) metal is a candidate material of not only neutron-multiplier for fusion reactors but also a water-cooled target material for an accelerator-based boron neutron capture therapy. To investigate its reactivity in dry air and 1% H2O/Ar at 873-1273Â K, Be samples were fabricated by a novel plasma-sintering method proposed herein. Because of its reactivity in dry atmosphere, parabolic oxidation of Be along grain boundaries was predominant up to 1173Â K at an activation energy of 52Â kJ/mol, while catastrophic oxidation occurred at 1273Â K. The introduction of H2O facilitated breakaway in Be oxidation. Hence, the weight and H2 concentration of Be tested in 1% H2O/Ar dramatically increased from 973Â K, while samples tested for 24Â h were completely oxidized in appearance.
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Energy Engineering and Power Technology
Authors
Jae-Hwan Kim, Masaru Nakamichi,