抄録
In order to investigate the effect of oxidation on the delamination strength of 8mass%Y_2O_3-ZrO_2 thermal barrier coating deposited on Co-base superalloy with CoNiCrAlY bond coat layer, the specimens were heated in air at 1073K, 1273K and 1473K for 36∿3960ks. Al_2O_3 oxide and complex oxide layers were formed along the interface between the top-coat and the bond at layers, and the thickness of the oxide layers became large with increasing heating temperature and time. The tensile and the edge-indent tests showed that the delamination strength increased to a maximum and decreased with increace in Al_2O_3 layer thickness.
