Deformation behavior of Thermal Barrier Coated Material by APS under Thermal Cycling Condition

摘要

When thin coated material plate is subjected to a high-temperature, the plate is bended due to difference of thermal expansion coefficient between coating and substrate. Therefore, stress in coating layer under a high-temperature will be able to measure directly through a bending deflection of the plate. The aim of this paper deals with measurement method of in situ stress in coating layer under thermal cycling condition. The top coating material treated in this study is conventional and virtical cracked APS 8wt% Y{sub}2O{sub}3-ZrO{sub}2. Bending deflection is measured by laser senser, and in-situ stress in coating layer is obtained based on classic bending beam theory. Comparison about thermal stress between TBCs will be done.