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Trends and Perspectives in Mitigating CMAS Infiltration in Thermal Barrier Coating

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Ceramic Coatings for High-Temperature Environments

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Abstract

The aerospace industry is facing challenges in meeting environmental and energy demands, which require a reduction in fuel consumption, emissions and production costs while improving the efficiency of aero-engines. One way to achieve this is by developing a thermal barrier coating (TBC) on the hottest components of the turbine to increase its inlet temperature. Different methods are used to deposit TBC, including air plasma spray (APS) and electron beam physical vapor deposition (EB-PVD), with each having its advantages and disadvantages. Current process developments are constantly trying to find a good compromise between intrinsic material properties, production cost and feasibility. With this in mind, suspension plasma spraying (SPS) has emerged as a viable option that can replace some applications. However, in service, complex loadings and environmental contaminants such as calcium-magnesium-aluminosilicate (CMAS) damage the TBC and reduce its durability. After presenting the SPS process, its application to thermal barrier coatings and industrialization challenges of the process, the chapter discusses the effects of CMAS infiltration on TBC and the methodologies used to characterize the damage during engine operation. Then, it explores potential solutions to mitigate CMAS attack, including modifying the coating composition, introducing additional layers, using SPS coatings and developing “CMAS-superphobic” surfaces.

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Acknowledgements

This work received no specific grant from any funding agency in the public or commercial sectors but M.G. would like to thank SAFRAN for the funding of his thesis. The authors of IRCER and ONERA would also like to thank the New Aquitaine region and SAFRAN for their support to the development of new generation coatings for aeronautics.

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Authors and Affiliations

  1. University of Limoges, CNRS, IRCER, UMR 7315, 87000, Limoges, France

    Maxime Gaudin, Lucille Despres, Emilie Béchade, Alan Kéromnès, Simon Goutier, Alain Denoirjean, Vincent Rat & Armelle Vardelle

  2. SAFRAN TECH, 78772, Magny Les Hameaux, France

    Maxime Gaudin & Aurélien Joulia

  3. DMAS, ONERA, Université Paris Saclay, 91123, Palaiseau, France

    Alice Dolmaire

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  1. FunGlass—Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Trenčín, Slovakia

    Amirhossein Pakseresht

  2. FunGlass—Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Trenčín, Slovakia

    Kamalan Kirubaharan Amirtharaj Mosas

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Gaudin, M. et al. (2024). Trends and Perspectives in Mitigating CMAS Infiltration in Thermal Barrier Coating. In: Pakseresht, A., Amirtharaj Mosas, K.K. (eds) Ceramic Coatings for High-Temperature Environments. Engineering Materials. Springer, Cham. https://doi.org/10.1007/978-3-031-40809-0_2

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