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Oxidation behaviour of a CoNiCrAlY/h-BN based abradable coating

Jońca, Justyna Elżbieta and Malard, Benoît and Soulié, Jérémy and Sanviemvongsak, Tom and Selezneff, Serge and Vande Put, Aurélie Oxidation behaviour of a CoNiCrAlY/h-BN based abradable coating. (2019) Corrosion Science, 153. 170-177. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2019.02.030

Abstract

The oxidation resistance of a thermally sprayed CoNiCrAlY/h-BN abradable coating was studied at 750 and 900 °C. First, the high porosity of the abradable coating was carefully characterised in order to estimate the specific surface area of the coating, required to evaluate the oxidation kinetics. Then the formed oxides were investigated by XRD, Raman spectroscopy and SEM. At 900 °C, the mass variations exhibited a deviation from parabolic behaviour due to rapidly growing oxides. Meanwhile, at 750 °C, after a transient state, the oxidation rate reaches a steady state, indicating that a protective alumina scale was maintained at this temperature.

Item Type:Article
HAL Id:hal-02143137
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > SAFRAN (FRANCE)
Laboratory name:
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Deposited By: Yves MOMBOISSE
Deposited On:29 May 2019 08:38

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