The aim of this work, devoted to yttria stabilised zirconia (YSZ) thermal barrier coatings, is to produce by DC plasma spraying a single thick pass macro cracked orthogonally to the substrate. YSZ was plasma sprayed in air atmosphere on Hastelloy X substrates, with a NiCrAlY bond coat. A three-zone microstructure is observed, where lamellae and columns are present. The measurements of deposition stresses during spraying allow explaining the macrocrack formation.

aeronautical applications, microstructure, plasma spraying, thermal barrier coatings, yttria stabilised zirconia
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Copyright © 2005 Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH. All rights reserved.
2005
ASM International
Topics
Microstructure Thermal barrier coatings Yttria-stabilized zirconia Plasma spray coating
Issue Section:
Thermal Barrier Coatings
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