Development of Multifunctional Erosion-Damping Coating Systems and Application Methods for IBRs and Blisks

In this Phase I effort, new advanced multifunctional thin-layered erosion-resistant (ERC) systems and process technologies will be developed. The goal of the research is to develop innovative and advanced multifunctional damping coating systems in thin layer configurations not only to enhance high damping for prevention of HCF but also to significantly improve resistance to erosion. An additional goal is to further enhance fatigue strength of gas turbine compressor IBRs or blisks in harsh sand ingestion and/or combustion gas environments. The advanced multifunctional erosion-resistant damping coating system consists of a duplex coating system which consists of a top coat, a state-of-the-art multi-layered erosion resistant coating and a bond coat, our damping coating system. The damping bond coating can be seen as a soft core supporting a hard outer surface (ERC). The combination of a hard surface and a soft interior has been greatly valued in modern engineering because it can withstand very high stress and fatigue which thus acts as a damage barrier to prevent crack penetration into the substrate from ERC and to arrest cracks initiated from the substrate.