New insight into δ-Pu alloy oxidation kinetics highlighted by using in-situ X-ray diffraction coupled with an original Rietveld refinement method
| Autor: | B. Oudot, F. Delaunay, B. Ravat, L. Jolly, I. Popa, A. Fabas, H. Guerault |
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| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Materials science Rietveld refinement General Chemical Engineering Alloy Kinetics Analytical chemistry Oxide 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry X-ray crystallography engineering General Materials Science Destabilisation 0210 nano-technology Porosity |
| Zdroj: | Corrosion Science. 138:66-74 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2018.03.046 |
| Popis: | The reactivity of a δ-Pu alloy was studied under dry oxygen at different temperatures. Phase analysis has shown the presence of α-and β-Pu2O3, PuO2, as well as the destabilisation of the δ-phase. The oxidation kinetics were studied using in-situ X-ray diffraction coupled with an original method of Rietveld refinement enabling an individual monitoring of the growth of each oxide. The results have evidenced a parabolic stage resulting from the thickening of the α-Pu2O3 layer, in which a compressive stress state develops. This stage is followed by the linear growth of a porous PuO2 scale. |
| Databáze: | OpenAIRE |
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