Radiation effects on interface reactions of U/Fe, U/(Fe plus Cr), and U/(Fe plus Cr plus Ni)
Abbreviated Journal Title
J. Nucl. Mater.
Keywords
MECHANICAL-PROPERTIES; STEEL; INTERDIFFUSION; TANTALUM; ALLOY; FE; Materials Science, Multidisciplinary; Nuclear Science & Technology; Mining & Mineral Processing
Abstract
We study the effects of radiation damage on interdiffusion and intermetallic phase formation at the interfaces of U/Fe, U/(Fe + Cr), and U/(Fe + Cr + Ni) diffusion couples. Magnetron sputtering is used to deposit thin films of Fe, Fe + Cr, or Fe + Cr + Ni on U substrates to form the diffusion couples. One set of samples are thermally annealed under high vacuum at 450 degrees C or 550 degrees C for one hour. A second set of samples are annealed identically but with concurrent 3.5 MeV Fe++ ion irradiation. The Fe++ ion penetration depth is sufficient to reach the original interfaces. Rutherford backscattering spectrometry analysis with high fidelity spectral simulations is used to obtain interdiffusion profiles, which are used to examine differences in U diffusion and intermetallic phase formation at the buried interfaces. For all three diffusion systems, Fe++ ion irradiations enhance U diffusion. Furthermore, the irradiations accelerate the formation of intermetallic phases. In U/Fe couples, for example, the unirradiated samples show typical interdiffusion governed by Fick's laws, while the irradiated ones show step-like profiles influenced by Gibbs phase rules. (C) 2014 Elsevier B.V. All rights reserved.
Journal Title
Journal of Nuclear Materials
Volume
456
Publication Date
1-1-2015
Document Type
Article
Language
English
First Page
302
Last Page
310
WOS Identifier
ISSN
0022-3115
Recommended Citation
"Radiation effects on interface reactions of U/Fe, U/(Fe plus Cr), and U/(Fe plus Cr plus Ni)" (2015). Faculty Bibliography 2010s. 6796.
https://stars.library.ucf.edu/facultybib2010/6796
Comments
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