Delon, Elodie and Ansart, Florence
and Duluard, Sandrine Nathalie
and Bonino, Jean-Pierre
and Monceau, Daniel
and Vande Put, Aurélie
and Mainguy, Ronan
and Thouron, Carole
and Malié, André and Joulia, Aurélien and Bianchi, Luc and Gomez, Philippe
Outstanding durability of sol-gel thermal barrier coatings reinforced by YSZ-fibers.
(2018)
Journal of the European Ceramic Society, 38 (14). 4719-4731. ISSN 0955-2219
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 6MB |
Official URL: https://doi.org/10.1016/j.jeurceramsoc.2018.06.025
Abstract
Thermal barrier coatings (TBC) were fabricated with commercial powders of yttria stabilized zirconia with spherical and fiber-like morphologies. The influence of fiber percentage and sintering temperature on the thermomechanical behavior was studied. TBCs with 60%–80% fibers content had the best lifetime in cyclic oxidation with less than 10% of coating spallation after 1000 cycles, with very good reproducibility. They reached lifetimes higher than industrial TBCs made by EB-PVD. The enhancement of durability is believed to be due to an increase in the thermomechanical constraints accommodation thanks to higher porosity and higher tenacity due to the presence of well anchored fibers, indeed deviation of the cracks were observed. Moreover, the morphology of the thermally grown oxide (TGO) layer is also favorable as it includes anchorage points of the TGO with fibers. This increased the adherence at the substrate interface and improved lifetime.
Item Type: | Article |
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HAL Id: | hal-02114969 |
Audience (journal): | International peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Other partners > Direction Générale pour l'Armement - DGA (FRANCE) Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) Other partners > SAFRAN (FRANCE) |
Laboratory name: | |
Funders: | French Defense Research Organization (DGA) - SAFRAN Group |
Statistics: | download |
Deposited On: | 30 Apr 2019 07:02 |
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