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HomeMaterials Science ForumMaterials Science Forum Vol. 1016The Isothermal Oxidation of MCrAlY Protective...

The Isothermal Oxidation of MCrAlY Protective Coatings

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Abstract:

The thermal barrier coatings (TBC) are commonly used for protection of jet engine parts. In presented article the influence of chemical composition of TBCs bond coats on isothermal oxidation resistance was analysed. The bond coat was plasma sprayed (APS) using different MCrAlY alloys produced by Oerlikon-Metco: Metco 4451, AMDRY 997, AMDRY 962, AMDRY 365-1, AMDRY 995C. The conducted research showed big difference in coating thickness despite the same spraying parameters. The difference in porosity was not observed. The isothermal oxidation test was conducted during 500h at 1100°C in static laboratory air. The obtained results showed, that degradation mechanism of MCrAlY bond coats regardless of chemical composition is similar. The formation of scale contained aluminium and chromium oxides was observed. The internal oxidation effect was also observed in produced coatings.

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THERMEC 2021

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Periodical:

Materials Science Forum (Volume 1016)

Pages:

407-412

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1016.407

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Online since:

January 2021

Authors:

Marcin Drajewicz, Tadeusz Kubaszek, Barbara Kościelniak, Marek Góral*, Dawid Dziadosz

Keywords:

Bond Coat, MCrAlY Coatings, Protective Coatings, Superalloys, Thermal Spray, Turbine Blades

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* - Corresponding Author

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