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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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Ni, N.
Imperial College London
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2017Micromechanical strength of individual Al2O3 plateletscitations
- 2017The use of 3d graphene networks for the creation of bio-inspired self-monitoring tough ceramic nanocomposites
- 2017High-Mobility and High-Optical Quality Atomically Thin WS2citations
- 2016Porosity in oxides on zirconium fuel cladding alloys, and its importance in controlling oxidation ratescitations
- 2016An investigation of the oxidation behaviour of zirconium alloys using isotopic tracers and high resolution SIMScitations
- 2016How the crystallography and nanoscale chemistry of the metal/oxide interface develops during the aqueous oxidation of zirconium cladding alloyscitations
- 2016Multi-scale characterisation of oxide on zirconium alloyscitations
- 2016Mechanisms of oxidation of fuel cladding alloys revealed by high resolution APT, TEM and SIMS analysiscitations
- 2016Focussed ion beam sectioning for the 3D characterisation of cracking in oxide scales formed on commercial ZIRLO (TM) alloys during corrosion in high temperature pressurised watercitations
- 2016Studies regarding corrosion mechanisms in zirconium alloyscitations
- 2016The atomic scale structure and chemistry of the zircaloy-4 metal-oxide interface
- 20163D visualisation of crack distributions in oxidised zirconium alloys by FIB-slicingcitations
- 2016Characterizing environmental degradation in PWRs by 3D FIB sequential sectioning
- 2016Quantitative EELS analysis of zirconium alloy metal/oxide interfaces.citations
- 2016Crystal structure of the zro phase at zirconium/zirconium oxide interfacescitations
- 2015The effect of Sn on corrosion mechanisms in advanced Zr-cladding for pressurised water reactorscitations
- 2014Effect of Sn on Corrosion Mechanisms in Advanced Zr-Cladding for Pressurised Water Reactorscitations
- 2013An investigation of the oxidation behaviour of zirconium alloys using isotopic tracers and high resolution SIMScitations
- 2013An investigation of the oxidation behaviour of zirconium alloys using isotopic tracers and high resolution SIMScitations
- 2013The effect of Sn on corrosion mechanisms in advanced Zr-cladding for pressurised water reactors
- 2012How the crystallography and nanoscale chemistry of the metal/oxide interface develops during the aqueous oxidation of zirconium cladding alloyscitations
- 2012How the crystallography and nanoscale chemistry of the metal/oxide interface develops during the aqueous oxidation of zirconium cladding alloyscitations
- 2012Mechanisms of oxidation of fuel cladding alloys revealed by high resolution APT, TEM and SIMS analysiscitations
- 2011Studies regarding corrosion mechanisms in zirconium alloyscitations
- 2011Studies regarding corrosion mechanisms in zirconium alloyscitations
Places of action
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article
How the crystallography and nanoscale chemistry of the metal/oxide interface develops during the aqueous oxidation of zirconium cladding alloys
Abstract
Aqueous corrosion and hydrogenation have become major limiting factors to the use of zirconium alloys as fuel cladding and assembly components in water-cooled nuclear reactors. The metal-oxide interface has been a particular focus of previous research, but there is still no clear understanding of what is present at the interface at different stages of the complex oxidation process. We report here a systematic investigation using state-of-the-art instrumentation on the interfaces in several zirconium alloys corroded for different times. We have shown that thin intermediate oxide layers with compositions close to ZrO can be observed in almost all the pre-transition samples studied, and that this layer thickens during the pre-transition stage. Just before the kinetic transition, a large variation in the suboxide width was detected, suggesting that the kinetic transition is an extremely local process. After transition the suboxide was generally absent. In the suboxide locations different structures, including an unidentified phase, were found. The oxygen-saturated (∼30 at.% O) metal regions found beneath the oxide are thickest in the (late) pre-transition samples and significantly thinner in the post-transition samples. We suggest that the suboxide cannot by itself act as a protective layer and conclude that it is the development of interlinked porosity down to the metal-oxide interface that is the reason for the transition in oxidation kinetics. © 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.