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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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Gheno, Thomas
Office National d'Études et de Recherches Aérospatiales
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Modeling the Role of the Grain Structure in the Oxidation of Polycrystals
- 2024Effects of Al and refractory alloying elements (W, Ta and Hf) on oxidation kinetics, oxygen dissolution and diffusion in titanium alloyscitations
- 2024Combining experiments and simulations to study high temperature corrosion: data, models, tools
- 2023Kinetics of Alloy Depletion During Selective Oxidation in Polycrystalscitations
- 2023Effect of refractory elements and of aluminium on oxygen diffusion and solubility in Titanium alloys: experiments and first-principles calculations
- 2022Simulation of diffusion with non-equilibrium vacancies, Kirkendall shift and porosity in single-phase alloyscitations
- 2021Alumina Failure and Post-failure Oxidation in the NiCoCrAlY Alloy System at High Temperaturecitations
- 2021Alumina Failure and Post-failure Oxidation in the NiCoCrAlY Alloy System at High Temperaturecitations
- 2020Oxidation Behavior of a Spark Plasma Sintered Ti–48Al–2W–0.1B Alloy at 800 °Ccitations
- 2020On the role of surface deformation in the oxidation of NiCr alloys at 340–600 °C ; Sur le rôle de la déformation de surface dans l'oxydation des alliages NiCr à 340-600 °Ccitations
- 2018Revisiting the role of substrate microstructure and short-circuit diffusion in the oxidation of Ni-Cr alloys
- 2018On the Simulation of Composition Profiles in NiCoCrAl Alloys During Al2O3 Scale Growth in Oxidation and Oxidation-Dissolution Regimescitations
- 2017Kinetics of Al2O3-Scale Growth by Oxidation and Dissolution in Molten Silicate
- 2017Modes of Deposit-Induced Accelerated Attack of MCrAlY Systems at 1100 °Ccitations
- 2016On the Reaction Mechanism of MCrAlY Alloys with Oxide–Sulfate Deposits at 1100 °Ccitations
- 2013Kinetics of breakaway oxidation of Fe–Cr and Fe–Cr–Ni alloys in dry and wet carbon dioxidecitations
- 2012Oxidation and carburisation of model chromia-forming alloys in carbon dioxide
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thesis
Oxidation and carburisation of model chromia-forming alloys in carbon dioxide
Abstract
Materials to convey hot CO2-rich gases are needed in carbon capture technologies currently being developed. This work is aimed at investigating the factors controlling the oxidation of chromia-forming alloys in these atmospheres. To do so, model Fe–Cr and Fe–Cr–Ni alloys were exposed to Ar–CO2–H2O gas mixtures at 650 and 800 °C,and the reaction products examined using conventional metallography techniques. Carbide precipitation beneath oxide scales reflects a carbon supersaturation at the metal/oxide interface relative to the external atmosphere: as a gradient of oxygen potential is established across the growing scale, an elevated carbon activity results at the interface if the scale transmits carbon. On the basis of a local equilibrium model, measured carburisation rates and precipitate volume fractions were used to evaluate the influence of oxide composition and of the presence of H2O in the gas on carbon uptake/transport in the scales. Limited carburisation beneath Cr2O3 scales was shown by means of an analysis of subscale chromium depletion not to alter the oxide stability. The morphological evolution of Fe-rich oxide nodules formed as a result of localised Cr2O3 failure was studied in relation to the alloy ability to supply chromium to the metal/oxide interface. Application of nucleation-growth models to the kinetics of nodule development allowed the resistance of Cr2O3 scales to be evaluated in terms of nodule nucleation rates determined from experimental nodule surface coverages and specimen weight gains. The relative importance of nodule nucleation and growth in determining the overall alloy performance as a function of reaction temperature is discussed.