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Self-healing thermal barrier coating systems fabricated by spark plasma sintering

Nozahic, Franck and Estournès, Claude and Carabat, Alexandra Lucia and Sloof, Willem G. and van der Zwaag, Sybrand and Monceau, Daniel Self-healing thermal barrier coating systems fabricated by spark plasma sintering. (2018) Materials & Design, 143. 204-213. ISSN 0264-1275

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.matdes.2018.02.001


The present paper focuses on the Spark Plasma Sintering (SPS) manufacturing of a new type of self-healing thermal barrier coating (TBC) and a study of its thermal cycling behaviour. The ceramic coating consists on an Yttria Partially Stabilized Zirconia (YPSZ)matrix intowhich healing agents made of MoSi2-Al2O3 core-shell particles are dispersed prior to sintering. The protocol used to sinter self-healing TBCs on MCrAlY (M: Ni or NiCo) pre-coated Ni-based superalloys is described and the reaction between the particles and the MCrAlY bond coating as well as the preventive solutions are determined. Thermal cycling experiments are performed on this complete multilayer systemto study the crack healing behaviour. Post-mortem observations highlighted local healing of cracks due to the formation of silica and the subsequent conversion to zircon at the rims of the cracks.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com. The original PDF of the article can be found at : https://www.sciencedirect.com/science/article/pii/S0264127518300790
HAL Id:hal-01727587
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 - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Delft University of Technology - TU Delft (NETHERLANDS)
Laboratory name:
European Union
Deposited On:09 Mar 2018 11:23

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