%0 Journal Article %T High temperature steam oxidation of chromium-coated zirconium-based alloys: Kinetics and process %+ CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)) %+ Laboratoire d'Etude du Comportement Mécanique des Matériaux (LC2M) %+ Institut de Recherche Dupuy de Lôme (IRDL) %+ Batna University %+ Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) %+ FRAMATOME %+ EDF (EDF) %A Brachet, J.-C. %A Rouesne, E. %A Ribis, J. %A Guilbert, T. %A Urvoy, S. %A Nony, G. %A Toffolon-Masclet, C. %A Le Saux, Matthieu %A Chaabane, N. %A Palancher, H. %A David, A. %A Bischoff, J. %A Augereau, J. %A Pouillier, E. %< avec comité de lecture %J Corrosion Science %P -- %8 2020 %D 2020 %R 10.1016/j.corsci.2020.108537 %K Zirconium alloys %K High temperature steam oxidation %K Chromium coating %K Enhanced accident tolerant nuclear fuel claddings %Z Engineering Sciences [physics]Journal articles %X The oxidation of chromium-coated zirconium-based alloys is studied under steam at temperatures ranging from 800 °C up to 1500 °C and for oxidation times ranging from a few minutes up to a few hours. For oxidation temperatures up to 1300 °C, the overall oxidation kinetics is nearly parabolic at the beginning of oxidation, when the Cr outer layer is protective. Finally, it significantly accelerates and hydrogen is absorbed during a short period. These steps correspond to different oxidation and diffusion mechanisms, involving: growth of outer chromia scale; Zr-Cr interdiffusion, inducing Zr(Cr,Fe)2 intermetallic layer thickening then disappearance due to transformation into metallic chromium and zirconia; transport of oxygen through residual chromium (in particular along grain boundaries) and into the zirconium substrate, and finally growth of a sub-coating zirconia. The additional effect of the Zr-Cr eutectic reaction occurring when the oxidation temperature is increased beyond 1300 °C is also studied and briefly discussed. © 2020 Elsevier Ltd %G English %2 https://hal.science/hal-02520055/document %2 https://hal.science/hal-02520055/file/S0010938X19322565.pdf %L hal-02520055 %U https://hal.science/hal-02520055 %~ CEA %~ UNIV-BREST %~ ENSTA-BRETAGNE %~ CNRS %~ UNIV-UBS %~ UBS %~ ENIB %~ COMUE-NORMANDIE %~ DSV %~ DEN %~ CEA-UPSAY %~ IRDL %~ UNIV-PARIS-SACLAY %~ EDF %~ CEA-DRF %~ UNIROUEN %~ DEN-SACLAY %~ LMSM %~ ENSTA-BRETAGNE-MECA %~ TEST-HALCNRS %~ UNIVERSITE-PARIS-SACLAY %~ GS-ENGINEERING %~ GS-PHYSIQUE %~ ENSTA-BRETAGNE-PTR5-IRDL %~ ELSEVIER