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ASME Press Select Proceedings
International Hydrogen Conference (IHC 2016): Materials Performance in Hydrogen Environments
Editor
B. P. Somerday
B. P. Somerday
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P. Sofronis
P. Sofronis
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ISBN:
9780791861387
No. of Pages:
800
Publisher:
ASME Press
Publication date:
2017

Corrosion experiments using spherical U powders are continuing with scanning electron microscopy (SEM) showing that the particles are highly textured, 5 μm to 25 μm diameters with 4% larger particles that are fused smaller particles. This U has a high specific surface area with no corners or back-sides, is well annealed with no machining work, and coated with a coherent oxide film, 30 nm to 300 nm thick. Exposure of this powder to low vapor pressure H2O in the absence of O2, i.e., a vacuum desiccator, resulted in a coherent oxide film growth of ∼1 μm/y, ∼ 10X the growth rate in ambient air, displaying fracture along the growth plane at ∼300 nm.

Introduction
Experimental
Conclusions
Acknowledgements
References
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