抄録
A high heat flux thermal testing apparatus using plasma was manufactured in order to evaluate the TBC's environmental resistance. The testing apparatus is able to control the composition of plasma gas. High heat thermal cyclic tests using air plasma with/without H_2O(g) were implemented for four kinds of the developed TBC (top coating; high purity YSZ(APS), ErSZ(APS), ScSZ(EB-PVD), La_2Zr_2O_7(APS)). Results of the thermal cyclic test have revealed that; (1) In the case of the top coating which has characteristics of low sintering resistance, temperature on the surface of the substrate was increased as cycled. (2) The presence of H_2O(g) influences the degradation and damage such as sintering behavior of the top coating and oxidation of the interface of the top coating/bond coating.
