Turbine entrance temperatures in the latest high-efficiency jet engines rise to more than 1773 K, which significantly raises the bar for thermal barrier coatings (TBCs). This paper describes a ternary coating system consisting of a vacuum plasma sprayed NiCrAlY bond coat, an atmospheric plasma sprayed ZrO2 top coat, and a MoSi2 middle coat. The middle layer inhibits oxidation of the nickel-chromium bond coat, thus extending the service life of the TBC system. Paper includes a German-language abstract.

gas turbine blades, molybdenum disilicide coating, NiCrAlY coating, plasma spraying, ternary coating systems, thermal barrier coatings, zirconia coating
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Copyright © 2002 Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH. All rights reserved.
2002
Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH
Topics
Thermal barrier coatings Nickel-chromium alloys Yttria-stabilized zirconia Plasma spray coating Turbine blades
Issue Section:
Industry and Applications
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