# Modeling Two- and Three-Stage Oxygen Tracer Experiments during High-Temperature Oxidation of Metals with a High Oxygen Solubility

Mazères, Benoît and Desgranges, Clara and Toffolon-Masclet, Caroline and Monceau, Daniel Modeling Two- and Three-Stage Oxygen Tracer Experiments during High-Temperature Oxidation of Metals with a High Oxygen Solubility. (2018) Oxidation of Metals, 89 (5-6). 517-529. ISSN 0030-770X

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Official URL: https://doi.org/10.1007/s11085-017-9816-3

## Abstract

The numerical tool EKINOX-Zr has been upgraded to simulate oxygen tracer experiments during the high-temperature oxidation of a metal with a high oxygen solubility limit. The penetration of 18O tracer is calculated during the dynamic evolution of the ZrO2-x/$\alpha$Zr(O)/$\beta$zr system. The numerical approach allows to explicitly take into account the variation of the tracer diffusion coefficient through the oxide scale as a function of the vacancy concentration. A classical two-stages 16O2/18O2Â tracer experiment has been simulated. It is shown that a classical fitting procedure on the 18O concentration profile obtained for short-time experiments leads to the identification of the oxygen chemical diffusion coefficient. The second type of tracer experiment is proposed usingÂ a three-stages 16O2/18O2/16O2 oxidation. It allows the direct estimation of the diffusion coefficient from the transport of 18O peak in the growing oxide scale.

Item Type: Article hal-01997441 International peer-reviewed journal French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)Other partners > Communauté urbaine Grand Paris Seine et Oise - CU GPS&O (FRANCE)Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)Other partners > Université Paris-Saclay (FRANCE)Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)Other partners > SAFRAN (FRANCE) download cirimat webmestre 29 Jan 2019 08:10

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