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Volume 12
Issue 2
10.3390/coatings12020106
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Article

Development of Thermal Barrier Coating Systems from Al Microparticles—Part II: Characterisation of Mechanical and Thermal Transport Properties

by
Germain Boissonnet
*,
Jean-Luc Grosseau-Poussard
,
Gilles Bonnet
and
Fernando Pedraza
Laboratoire des Sciences de l’Ingénieur Pour l’Environnement—Université de La Rochelle LaSIE, UMR-CNRS 7356, Avenue Michel Crépeau, CEDEX 1, 17042 La Rochelle, France
*
Author to whom correspondence should be addressed.
Coatings 2022, 12(2), 106; https://doi.org/10.3390/coatings12020106
Submission received: 30 December 2021 / Revised: 14 January 2022 / Accepted: 15 January 2022 / Published: 18 January 2022
(This article belongs to the Special Issue Coatings in 2022)
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Abstract

In this study, the mechanical resistance and the thermal insulation potential of novel thermal barrier coatings (TBCs) made of a foam of hollow alumina particles are assessed through scratch testing, micro-indentation and thermal diffusivity measurements using laser-flash. The thermal diffusivity of the foam coatings ranges between 0.6 × 10−7 and 5 × 10−7 m2·s−1 and is thus comparable with the thermal insulation potential of the standard plasma-sprayed (PS) and electron beam–physical vapour-deposited (EB-PVD) TBCs made of yttria-stabilised zirconia (YSZ). The coatings annealed in more oxidative atmospheres exhibit greater mechanical resistance due to the thickening of the alumina shells and the increased sintering of the foam. However, when the oxidation is poorly tailored, the adhesion of the foam to the substrate decreases due to the presence of unwanted oxide that grows at the substrate/coating interface.
Keywords: slurry coating; thermal barrier coating; thermal diffusivity; scratch tests slurry coating; thermal barrier coating; thermal diffusivity; scratch tests

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MDPI and ACS Style

Boissonnet, G.; Grosseau-Poussard, J.-L.; Bonnet, G.; Pedraza, F. Development of Thermal Barrier Coating Systems from Al Microparticles—Part II: Characterisation of Mechanical and Thermal Transport Properties. Coatings 2022, 12, 106. https://doi.org/10.3390/coatings12020106

AMA Style

Boissonnet G, Grosseau-Poussard J-L, Bonnet G, Pedraza F. Development of Thermal Barrier Coating Systems from Al Microparticles—Part II: Characterisation of Mechanical and Thermal Transport Properties. Coatings. 2022; 12(2):106. https://doi.org/10.3390/coatings12020106

Chicago/Turabian Style

Boissonnet, Germain, Jean-Luc Grosseau-Poussard, Gilles Bonnet, and Fernando Pedraza. 2022. "Development of Thermal Barrier Coating Systems from Al Microparticles—Part II: Characterisation of Mechanical and Thermal Transport Properties" Coatings 12, no. 2: 106. https://doi.org/10.3390/coatings12020106

APA Style

Boissonnet, G., Grosseau-Poussard, J.-L., Bonnet, G., & Pedraza, F. (2022). Development of Thermal Barrier Coating Systems from Al Microparticles—Part II: Characterisation of Mechanical and Thermal Transport Properties. Coatings, 12(2), 106. https://doi.org/10.3390/coatings12020106

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