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Breakaway oxidation of zirconium alloys exposed to steam around 1000 °C

Abstract : The breakaway oxidation of Zircaloy-4 and M5Framatome alloys oxidized in flowing steam around 1000 °C was studied. The influences of oxidation temperature between 950 and 1050 °C, one-side versus two-side oxidation and chemical variations around the nominal composition of M5Framatome were investigated. Breakaway oxidation is sensitive to the oxidation temperature, the material and the oxidation type. A phenomenological mechanism for breakaway oxidation is postulated on the basis of microstructural and microchemical analyses.
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Submitted on : Friday, March 12, 2021 - 10:00:08 AM
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Matthieu Le Saux, Jean-Christophe Brachet, Valérie Vandenberghe, Antoine Ambard, Raphaël Chosson. Breakaway oxidation of zirconium alloys exposed to steam around 1000 °C. Corrosion Science, Elsevier, 2020, 176 (108936), pp.1-21. ⟨10.1016/j.corsci.2020.108936⟩. ⟨hal-02924036⟩

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