Selection of Oxide Materials for Use in a Thermal Barrier Coating System

Since the lifetime of hot-section components directly affects the main characteristics of the Gas Turbine Engine (GTE), their thermal protection is carried out by Thermal Barrier Coatings (TBC). Although this coating system consists of several layers, the main layer that provides thermal insulation is the top layer. One of the main reasons for the long-term operation of this type of coating in aggressive environments is the presence of oxide material in its composition. To meet the requirements of this environment, oxides are the focus of the search for new and alternative TBC materials. These materials are currently in an active development phase. Their thermo-mechanical properties usually determine the effectiveness of oxide materials. Therefore, much attention is paid to their properties when selecting oxide materials for the top layer. In this paper, the optimal TBC material was selected by taking into account the properties of a large number of oxide materials. The study was conducted using the Analytical Network Process (ANP) methodology. Ultimately, these results demonstrate that Gd2Zr2O7 has the highest rank among all the studied materials and is the most promising candidate for the top layer.