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Isothermal Oxidation Behaviour of NiCoCrAlYTa Coatings Produced by HVOF Spraying and Tribomet™ Process

Goti, Raphaël and Bétaille-Francoual, Marie and Hourcastagné, Elodie and Viguier, Bernard and Crabos, Fabrice Isothermal Oxidation Behaviour of NiCoCrAlYTa Coatings Produced by HVOF Spraying and Tribomet™ Process. (2013) Oxidation of Metals, 81 (1-2). 105-113. ISSN 0030-770X

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Official URL: http://dx.doi.org/10.1007/s11085-013-9422-y

Abstract

Protective NiCoCrAlYTa coatings are used on gas turbine single crystal superalloy blades to provide environmental resistance. They can be deposited by several processes. In this study, isothermal oxidation behaviour of NiCoCrAlYTa coatings produced by HVOF spraying and Tribomet TM process and deposited on single crystal nickel-based superalloy CMSX-4 were compared between 950 and 1,150°C for several exposure durations. Microstructure and chemical composition of both coatings were examined before and after oxidation testing and quite similar observations were made for both coating processes. The combination of phase and chemical analyses allowed the establishment of an occurrence diagram of phases for both coating processes, according to temperature and duration of exposure. The obtained diagrams seemed similar for both processes. Finally both processes appeared to be equivalent for the protection of CMSX-4 superalloy in isothermal oxidation conditions.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://link.springer.com The original PDF of the article can be found at Springer website : http://link.springer.com/article/10.1007%2Fs11085-013-9422-y
HAL Id:hal-01178653
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)
Other partners > Turbomeca (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > SAFRAN (FRANCE)
Laboratory name:
Funders:
Turbomeca-SAFRAN group
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Deposited By: cirimat webmestre
Deposited On:20 Jul 2015 13:51

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