Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack

The impact of small deposits of calcium–magnesium–aluminium silicates (CMAS) on the top of thermal barrier coatings (TBCs) made of yttria-stabilised zirconia (YSZ) produced via electron-beam physical vapour deposition (EB-PVD) is shown to play a role in the microstructural and chemical stability of...

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Autores principales: Boissonnet, Germain, Chalk, Christine, Nicholls, John R., Bonnet, Gilles, Pedraza, Fernando
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7579325/
https://www.ncbi.nlm.nih.gov/pubmed/33019659
http://dx.doi.org/10.3390/ma13194382
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author Boissonnet, Germain
Chalk, Christine
Nicholls, John R.
Bonnet, Gilles
Pedraza, Fernando
author_facet Boissonnet, Germain
Chalk, Christine
Nicholls, John R.
Bonnet, Gilles
Pedraza, Fernando
author_sort Boissonnet, Germain
collection PubMed
description The impact of small deposits of calcium–magnesium–aluminium silicates (CMAS) on the top of thermal barrier coatings (TBCs) made of yttria-stabilised zirconia (YSZ) produced via electron-beam physical vapour deposition (EB-PVD) is shown to play a role in the microstructural and chemical stability of the coatings; hence, it also affects the thermal insulation potential of TBCs. Therefore, the present work investigates the degradation potential of minor CMAS deposits (from 0.25 to 5 mg·cm(−2)) annealed at 1250 °C for 1 h on a novel Er(2)O(3)-Y(2)O(3) co-stabilised ZrO(2) (ErYSZ) EB-PVD TBC, which is compared to the standard YSZ coating. Due to the higher reactivity of ErYSZ coatings with CMAS, its penetration is limited in comparison with the standard YSZ coatings, hence resulting in a better thermal insulation of the former after ageing.
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spelling pubmed-75793252020-10-29 Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack Boissonnet, Germain Chalk, Christine Nicholls, John R. Bonnet, Gilles Pedraza, Fernando Materials (Basel) Article The impact of small deposits of calcium–magnesium–aluminium silicates (CMAS) on the top of thermal barrier coatings (TBCs) made of yttria-stabilised zirconia (YSZ) produced via electron-beam physical vapour deposition (EB-PVD) is shown to play a role in the microstructural and chemical stability of the coatings; hence, it also affects the thermal insulation potential of TBCs. Therefore, the present work investigates the degradation potential of minor CMAS deposits (from 0.25 to 5 mg·cm(−2)) annealed at 1250 °C for 1 h on a novel Er(2)O(3)-Y(2)O(3) co-stabilised ZrO(2) (ErYSZ) EB-PVD TBC, which is compared to the standard YSZ coating. Due to the higher reactivity of ErYSZ coatings with CMAS, its penetration is limited in comparison with the standard YSZ coatings, hence resulting in a better thermal insulation of the former after ageing. MDPI 2020-10-01 /pmc/articles/PMC7579325/ /pubmed/33019659 http://dx.doi.org/10.3390/ma13194382 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Boissonnet, Germain
Chalk, Christine
Nicholls, John R.
Bonnet, Gilles
Pedraza, Fernando
Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack
title Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack
title_full Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack
title_fullStr Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack
title_full_unstemmed Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack
title_short Thermal Insulation of YSZ and Erbia-Doped Yttria-Stabilised Zirconia EB-PVD Thermal Barrier Coating Systems after CMAS Attack
title_sort thermal insulation of ysz and erbia-doped yttria-stabilised zirconia eb-pvd thermal barrier coating systems after cmas attack
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7579325/
https://www.ncbi.nlm.nih.gov/pubmed/33019659
http://dx.doi.org/10.3390/ma13194382
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