Thermal insulation of CMAS (Calcium-Magnesium-Alumino-Silicates)- attacked plasma-sprayed thermal barrier coatings
| Autor: | Fernando Pedraza, Gilles Bonnet, Germain Boissonnet, John Nicholls, Christine Chalk |
|---|---|
| Přispěvatelé: | Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Cranfield University, School of Engineering - Cranfield University |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science business.industry Sintering [CHIM.MATE]Chemical Sciences/Material chemistry 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Thermal diffusivity 01 natural sciences Thermal barrier coating Coating Thermal insulation 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Cubic zirconia Composite material 0210 nano-technology Porosity business ComputingMilieux_MISCELLANEOUS Yttria-stabilized zirconia |
| Zdroj: | Journal of the European Ceramic Society Journal of the European Ceramic Society, Elsevier, 2020, 40 (5), pp.2042-2049. ⟨10.1016/j.jeurceramsoc.2019.12.040⟩ |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2019.12.040 |
| Popis: | International audience; The impact of the penetration of small quantities of calcium-magnesium-alumino-silicates (CMAS) glassy melt in the porous plasma-sprayed (PS) thermal barrier coatings (TBCs) is often neglected even though it might play a non-negligible role on the sintering and hence on the thermal insulation potential of TBCs. In this study, the sintering potential of small CMAS deposits (from 0.25 to 3 mg.cm-2) on freestanding yttria-stabilized zirconia (YSZ) PS TBCs annealed at 1250°C for 1 h was investigated. The results showed a gradual in-depth sintering with increasing CMAS deposits. This sintering was concomitant with local transformations of the tetragonal YSZ and resulted in an increase in the thermal diffusivity of the coatings that reached a maximum of 110 % for the fully penetrated coating. |
| Databáze: | OpenAIRE |
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