| 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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Podor, Renaud
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (50/50 displayed)
- 2024Development of a microfurnace dedicated to in situ scanning electron microscope observation up to 1300 °C. III. In situ high temperature experiments
- 2024Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitationcitations
- 2024Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitationcitations
- 2024On the oxidation and ignition of uranium carbide fragments in air and comparison with zirconium carbide oxidation
- 2024Oxidation behavior of platinum-containing γ, γ′ and TROPEA superalloy
- 2024Polyepitaxial grain matching to study the oxidation of uranium dioxidecitations
- 2024Oxidation Behavior of Platinum-Containing Model γ and γ′ and TROPEA Superalloy
- 2024Impact of gamma dose rate on the alteration of nuclear glass in geological disposal conditions
- 2024Type I Hot Corrosion Of Platinum-Containing Model γ and γ′ Alloyscitations
- 2023Modelisation of liquid nuclear waste vitrification : focus on the chemical processes
- 2023Role of molybdenum on the structure and properties of A2O-P2O5-MoO3 (A = Na, Ag, Rb, Cs) glassescitations
- 2023Liquid-liquid phase separation in borosilicate glass enriched in MoO3 – experimental investigations and thermodynamic calculationscitations
- 2023Observation of glass synthesis by in-situ high temperature ESEM
- 2023Understanding the solid/liquid interface evolution during the dissolution of Nd-doped UO2 by macro-/microscopic dual approachcitations
- 2022Real‐time capturing of microscale events controlling the sintering of lead‐free piezoelectric potassium‐sodium niobatecitations
- 2022Spontaneously crystallizing glass-ceramic mechanisms
- 2022Liquid-liquid phase separation in borosilicate glass enriched in MoO3 experimental investigations and thermodynamic calculationscitations
- 2021Effect of the process atmosphere on glass foam synthesis: A high-temperature environmental scanning electron microscopy (HT-ESEM) studycitations
- 2021Should Gold Marker or TEM-ASTAR Characterization Be Used to Determine Oxide Growth Direction?citations
- 2021Crystallization mechanism of BaO-CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> (BCAS) glass thin-filmscitations
- 2021SEraMic: a semi-automatic method for the segmentation of grain boundariescitations
- 2021Evaluation and application of a new scintillator‐based heat‐resistant back‐scattered electron detector during heat treatment in the scanning electron microscopecitations
- 2020Structural changes of Nd- and Ce-doped ammonium diuranate microspheres during the conversion to U<sub>1-y</sub> Ln yO<sub>2±x</sub>citations
- 2020In situ surface imaging: High temperature environmental SEM study of the surface changes during heat treatment of an Al Si coated boron steelcitations
- 2019Microstructural evolution of UO2 pellets containing metallic particles of Ru, Rh and Pd during dissolution in nitric acid solution: 3D-ESEM monitoringcitations
- 2019Unveiling the mechanisms of solid-state dewetting in Solid Oxide Cells with novel 2D electrodescitations
- 2018Effect of powder morphology on sintering kinetics, microstructure and mechanical properties of monazite ceramicscitations
- 2018On the solid-state dewetting of polycrystalline thin films: Capillary versus grain growth approachcitations
- 2017Densification behavior and microstructure evolution of yttrium-doped ThO 2 ceramicscitations
- 2017Densification behavior and microstructure evolution of yttrium-doped ThO$_2$ ceramicscitations
- 2017Impact of iron and magnesium on glass alteration: Characterization of the secondary phases and determination of their solubility constantscitations
- 2017Novel approaches for the in situ study of the sintering of nuclear oxide fuel materials and their surrogatescitations
- 2015Characterization of the ion-amorphization process and thermal annealing effects on third generation SiC fibers and 6H-SiCcitations
- 2014Electrochemical behavior of glass melts: application to corrosion processescitations
- 2013Approach of phase transformations and densification in nanostructured and (Bi2O3, ZnO,TiO2) doped silica ceramicscitations
- 2013In situ study of the crystallization mechanism in LiNbO$_3$-SiO$_2$ glasses
- 2012Calcined Resin Microsphere Pelletization (CRMP) a novel process for sintered metallic oxide pellets synthesis.citations
- 2012Mechanism of RuO2 Crystallization in Borosilicate Glass: An Original in Situ ESEM Approachcitations
- 2008Modelling of the grain growth and the densification of SnO2-based ceramicscitations
- 2005Influence of the microstructural fineness of cast superalloys on their high temperature oxidation behaviour
- 2005Study of Carbide Transformations during High-Temperature Oxidation of Nickel-Base Superalloyscitations
- 2005Influence of dendrites orientation on the high-temperature oxidation behaviour of cast nickel alloys
- 2004Influence of the Microstructural Texture of Cast Superalloys on their High-Temperature Oxidation Behaviourcitations
- 2004Influence of the microstructure texture of nickel base and cobalt base cast superalloys on their oxdation behaviour at high temperature ; Influence de la texture microstructurale de superalliages de fonderie à base de nickel et à base de cobalt sur leur comportement en oxydation à haute températurecitations
- 2004State of the Sub-surface Microstructure of Carbides strengthened cast Superalloys after High Temperature Oxidation -Use of Thermodynamic Modelling for a better Understandingcitations
- 2004State of the Sub-surface Microstructure of Carbides strengthened cast Superalloys after High Temperature Oxidation - Use of Thermodynamic Modelling for a better Understanding
- 2003Corrosion of superalloys in molten glass - Electrochemical characterization of the passive state
- 2003An example of thermodynamical calculations applied to the study of the high temperature behaviour of Co-base superalloys strengthened by tantalum carbides
- 2002High temperature oxidation and glass corrosion of cobalt base superalloys
- 2002Use of electrochemical techniques for the characterization of alloys corrosion in molten glasses
Places of action
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article
Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitation
Abstract
This work aims to investigate the behavior of Mo in UO2±x for being an abundant fission product with a high fission yield and a complex speciation linked to its interaction with the fuel and other fission product elements. UO2-based model compounds containing different Mo contents (between 0 and 15 mol%) were synthesized by a wet-chemistry route using hydroxide precipitation. The recovered powders were converted to oxides, pelletized, and sintered to obtain densified pellets of UO2 incorporating Mo. PXRD analyses and Rietveld refinement calculations indicate that Mo has an almost negligible solubility in the fluorite structures of both UO2 and UO2+x samples. SEM, TEM, and EDX characterizations of the produced UO2 + Mo pellets revealed the homogeneous distribution of nanosized metallic Mo particles of spherical geometry inside and outside the UO2 grains and throughout the whole sample pellets, whatever the amount of Mo added, thus confirming that the solubility of Mo in the fluorite structure is way below 0.6 mol% Mo in accordance with the PXRD results. The microstructural properties of the UO2 + Mo pellets, including density, porosity, Mo particle sizedistribution, and UO2 grain size variation with Mo content, were also determined. The addition of Mo to UO2 reduced the UO2 grain size as compared to UO2 grains in pure pellets, and Mo thus plays an inhibiting role in the UO2 grain growth during sintering. The produced UO2 + Mo pellets exhibit a microstructure similar to that of the real spent nuclear fuel, except that the UO2 grains are smaller. The Mo metallic nanoparticles in these simplified UO2-based model compounds of controlled microstructure could be harnessed as surrogates of the Mo-rich ε-phase metallic nanoparticles in the real spent nuclear fuel for future studies.