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Oxidation kinetics of a Ni-Cu based cermet at high temperature

Honvault, Christophe and Peres, Véronique and Cassayre, Laurent and Chamelot, Pierre and Palau, Patrice and Bouvet, Sylvie and Pijolat, Michèle Oxidation kinetics of a Ni-Cu based cermet at high temperature. (2013) Corrosion Science, vol. 68. pp. 154-161. ISSN 0010-938X

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Official URL: http://dx.doi.org/10.1016/j.corsci.2012.11.007

Abstract

The oxidation kinetics of a cermet composed of Ni–Cu alloy and nickel ferrite was studied by thermogravimetry at 960 °C under oxygen in the range 0.5–77 kPa. After an initial mass increase up to 15 g/m2 due to oxidation of surface metallic particles, the mass change was attributed to both outwards NiO growth and internal oxidation. Above 40 g/m2, the NiO scale thickness remained constant and the oxidation kinetics followed a complete parabolic law. The variations of the kinetic rate with oxygen partial pressure allowed to propose mechanisms, rate-controlling steps and kinetic laws in both transient and long term oxidation periods.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S0010938X12005495
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Rio Tinto Alcan (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure des Mines de Saint-Etienne - ENSMSE (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Laurent CASSAYRE
Deposited On:12 Apr 2013 07:19

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