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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jones, Cp
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Examination of a Ferritic-Martensitic Steel following Irradiation and High Temperature Water Corrosion
- 2022Investigating the mechanical behaviour of Fukushima MCCI using synchrotron Xray tomography and digital volume correlationcitations
- 2021Investigating the microstructure and mechanical behaviour of simulant "lava-like" fuel containing materials from the Chernobyl reactor unit 4 meltdowncitations
- 2020Effect of crack-like defects on the fracture behaviour of Wire + Arc additively manufactured nickel-base Alloy 718citations
- 2016The crystallographic structure of the air-grown oxide on depleted uranium metalcitations
- 2015Structural deformation of metallic uranium surrounding hydride growth sitescitations
- 2015An investigation into heterogeneity in a single vein-type uranium ore depositcitations
- 2015The effects of metal surface geometry on the formation of uranium hydridecitations
- 2013A surface science study of the initial stages of hydrogen corrosion on uranium metal and the role played by grain microstructurecitations
- 2013Altering the hydriding behaviour of uranium metal by induced oxide penetration around carbo-nitride inclusionscitations
- 2011An improved method to identify grain boundary creep cavitation in 316H austenitic stainless steel
Places of action
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article
Altering the hydriding behaviour of uranium metal by induced oxide penetration around carbo-nitride inclusions
Abstract
Secondary ion mass spectrometry (SIMS) and focused ion beam (FIB) milling were used to examine the surfaces of uranium samples, both before and after limited hydride formation to identify surface features that could provide sites for preferential hydrogen attack. Two sets of cast uranium samples containing 600 ppm carbon in the form of carbo-nitride inclusions were examined; one set was prepared by mechanically polishing to a fine grade and the other received a subsequent electropolishing step. SIMS analysis showed that the additional electropolishing resulted in oxide development along the inclusion metal interface that was not present after only mechanical polishing. These samples then underwent hydrogen exposure for a limited period under conditions expected to result in hydride formation. For uranium prepared by only mechanical polishing, the hydride growths were observed to occur in significant numbers and almost exclusively around exposed inclusions. Conversely, preparation involving electropolishing resulted in extremely limited numbers of hydride growth sites not obviously associated with inclusions. These differences in hydride formation behaviour are attributed to the presence of oxide formed along the inclusion-metal interface resulting from electropolishing, and highlight how the observed hydride-forming behaviours exhibited by uranium can be significantly altered by the method of surface preparation. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.