| People | Locations | Statistics |
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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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Baldinozzi, Gianguido
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (45/45 displayed)
- 2024Radiation effects in nano powders. CeO2 and aliovalent substitutions in CeO2 as simulants of PuO2
- 2024Radiation Effects in Uranium Nitride and Zirconium Nitride
- 2023Crystallization of polarons through charge and spin ordering transitions in 1T-TaS2citations
- 2023A review of the oxygen vacancy ordering in surrogate structures simulating Pu-based nuclear ceramicscitations
- 2023Stability of radiation-induced bixbyite phase in δ-Sc4Hf3O12
- 2023Unravelling Crystal Superstructures and Transformations in the La6−xMoO12−δ (0.6 ≤ x ≤ 3.0) Series: A System with Tailored Ionic/ Electronic Conductivity.citations
- 2023Radiation response in fluorite-related systems with dual spatial length-scales.
- 2023Radiation response in systems with dual spatial length-scales: the case of mixed valence fluorites with oxygen excess bixbyite order
- 2022Anomalous structural changes in swift heavy ion-irradiated δ-Sc4Hf3O12
- 2022Neutron Total Scattering and X-ray Diffraction Analysis of Radiation Effects in A3BO7 Weberite-type Complex Oxides
- 2022Far-From-Equilibrium Processing of Materials under Extreme Conditions
- 2022Phenomenological potentials for the refractory metals Cr, Mo and Wcitations
- 2022Oxygen sublattice organization in the pseudo-binary system Nd2O3-CeO2
- 2022Radiation effects in Gd2Ce2O7: role of anion sublattice in disordering and limitations of Gibbons model for damage evolution in disordered systems.
- 2020Radiation-Induced Effects on Materials Properties of Ceramics: Mechanical and Dimensional Propertiescitations
- 2020Effects of Grain Size on the Radiation Response of CeO2, ThO2, and UO2
- 2020Investigation of Disorder in Ho2Ti2-xZrxO7: Pyrochlore to Defective Fluorite Chemical Series
- 2019Emersion Project (AO2015) : Nanoscale assembly of non-miscible metals by numerical engineering of their interfaces.
- 2019Structural and Microstructural Features Observed in (Ln,U)O 2-x Systems
- 2019Influence of the miscibility gap in the evolution of the microstructure in UO2-based fuel doped with Nd
- 2018Analysing Mesoporous Thin Films Electrodes by Glancing-Incidence XRD-Application to Photorechargeable Li-ion Batteries
- 2018Influence of the miscibility gap in the evolution of the microstructure in UO2-based fuel doped with Nd
- 2018Effects of Crystallite Size on the Response of CeO2, ThO2, and UO2 to Highly Ionizing Radiation
- 2017Closure of the Mott gap and formation of a superthermal metal in the Fröhlich-type nonequilibrium polaron Bose-Einstein condensate in UO2+xcitations
- 2017Depth Profiling of Strain in Textured Tungsten Thin Films
- 2016Study of the correlation between fuel engineering properties and point defects
- 2016Study of the correlation between fuel engineering properties and point defects
- 2016Grain size-dependent electrical properties of La 1.95 Sr 0.05 Zr 2 O 7-δ as potential Proton Ceramic Fuel Cell electrolytecitations
- 2015Impact of Spark Plasma Sintering Conditions on Ionic Conductivity in La<sub>1.95</sub>Sr<sub>0.05</sub>Zr<sub>2</sub>O<sub>7-δ</sub> Electrolyte Material for Intermediate Temperature SOFCscitations
- 2015Influence of sintering methods on microstructure and ionic conductivity of La1.95Sr0.05Zr2O6.975 synthesized by co-precipitationcitations
- 2015Impact of Spark Plasma Sintering Conditions on Ionic Conductivity in La1.95Sr0.05Zr2O7-δ Electrolyte Material for Intermediate Temperature SOFCscitations
- 2015Impact of Spark Plasma Sintering Conditions on Ionic Conductivity in La1.95Sr0.05Zr2O7-δ Electrolyte Material for Intermediate Temperature SOFCs
- 2014Glancing incidence diffraction as a non-destructive tool to improve functional and structural systems for future nuclear applications.
- 2013A preferred orientation correction to describe a fiber texture under glancing incidence.citations
- 2013An attempt to handle the nanopatterning of materials created under ion beam mixingcitations
- 2013An attempt to handle the nanopatterning of materials created under ion beam mixingcitations
- 2012Probing Properties, Stability, and Performances of Hierarchical Mesoporous Materials with Nanoscale Interfacescitations
- 2012Is UO2 irradiation resistance due to its unusual high temperature behaviour?citations
- 2012Radiation Effects in Ceramics: Ceramics dislike strain, so they react to adapt
- 2012Designing Micro-SOFC Devices through the Sol-gel Process?
- 2012An attempt to handle the nanopatterning of materials created under ion beam mixing.citations
- 2011Optimization of Micro-SOFC Performance through the Control of the Architecture Using a Low Cost Process
- 2011In-situ X-Ray diffraction for ionic-covalent material study under swift heavy ion irradiation
- 2010Tailoring strain in the SrTiO3 compound by low-energy He+ irradiationcitations
- 2006Phase transition of pure zirconia under irradiation: A textbook examplecitations
Places of action
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document
Study of the correlation between fuel engineering properties and point defects
Abstract
Uranium dioxide is widely used as the fuel material in current civil nuclear reactors. The basic engineering properties of uranium oxide are essential to understand and predict the behavior of fuels under all conditions. The Uranium-Oxygen binary phase diagram shows the broad range of oxygen concentrations over which the UO2±x solid solution exists. In the hyperstoichiometric region, oxygen defects form clusters the behavior of which determines to a large extent a number of very important engineering properties such as ion diffusivity, electrical conductivity, creep, etc. Previous electrical conductivity experiments and point defect modelling of UO2+x material indicate that oxygen interstitial defects may start to form clusters at a low deviation-from-stoichiometry. In this study we aim to characterize the local crystalline structure that develops and the oxygen rearrangement that occurs in UO2+x (0 < x< 0.25) in order to improve our description of the nature of oxygen defects, and eventually, correlate atomic rearrangements to fuel properties. Neutron diffraction is one of the rare analytical techniques which enables the bulk properties of the anion sub-lattice to be studied. We present here an analysis of a neutron diffraction experiment carried out at ILL Grenoble on UO2 and UO2+x (x≈0.03) samples in a temperature range covering the phase transition between the two-phase (UO2+x and U4O9) and single-phase (UO2+x) domains. The Pair Distribution Function (PDF) analysis and the Rietveld refinement on both UO2+x and stoichiometric UO2 fuel specimens were applied to try to identify the local arrangement of atoms, i.e. the predominant defects and to understand how the temperature distorts the original fluorite structure. Data refinement for a UO2+x sample shows that di-interstitial defect clusters are consistent with the average defect structure of UO2.03 at high temperature in the homogenous single-phased domain. This conclusion is also consistent with the only other available neutron diffraction experiment data reported at higher deviations-from-stoichiometry..