6533b825fe1ef96bd12830e4

RESEARCH PRODUCT

New insight into δ-Pu alloy oxidation kinetics highlighted by using in-situ X-ray diffraction coupled with an original Rietveld refinement method

B. OudotF. DelaunayB. RavatL. JollyI. PopaA. FabasH. Guerault

subject

DiffractionMaterials scienceRietveld refinementGeneral Chemical EngineeringAlloyKineticsAnalytical chemistryOxide02 engineering and technologyGeneral Chemistryengineering.material010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical scienceschemistry.chemical_compoundchemistryX-ray crystallographyengineeringGeneral Materials ScienceDestabilisation0210 nano-technologyPorosity

description

Abstract 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.

yearjournalcountryeditionlanguage
2018-07-01Corrosion Science
https://doi.org/10.1016/j.corsci.2018.03.046