Thermomechanical Behavior of Plasma Sprayed Zr02-Y203 Coatings Influenced by Plasticity, Creep and Oxidation
Thermocycling of ceramic-coated turbomachine components produces high thermomechanical stresses that are mitigated by plasticity and creep but aggravated by oxidation, with residual stresses exacerbated by all three. These residual stresses, coupled with the thermocyclic loading, lead to high compressive stresses that cause the coating to spall. In this paper a ceramic-coated gas path seal is modeled with consideration given to creep, plasticity, and oxidation. The resulting stresses and possible failure modes are discussed.
11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings
Padovan, J.; Chung, Benjamin T.F.; McDonald, Glen E.; and Hendricks, Robert C., "Thermomechanical Behavior of Plasma Sprayed Zr02-Y203 Coatings Influenced by Plasticity, Creep and Oxidation" (1987). Mechanical Engineering Faculty Research. 1073.