Development of Multifunctional Damping Coating Systems for Turbine Engine Components

To prevent blade failure, the excited resonant response of the blades needs to be attenuated to an acceptable level. Several investigators have presented approaches to suppress blade vibration by providing additional damping through blade dampers. Among them, a high-damping magneto-mechanical surface coating layer developed by the PI is likely to be more practical. Under a recent effort, a novel free layer blade damper, using a thin layer of magneto-mechanical coating, has been developed by the PI for enhancing vibration damping, without diluting surface properties associated with resistance to wear, erosion, fatigue, and corrosion. The goal of the effort was to explore all the possibilities that this new damping coating system can achieve and lay down a solid theoretical and experimental foundation and framework on the fully realized implementation of this novel technology. The successful completion of the effort has already proved that the novel coating system is an effective solution providing significant damping to blades/blisks/IBRs at all vibration modes. Based the damping coating framework, in this Phase I, advanced multifunctional thin-layered thermal-barrier and erosion-resistant damping coating systems and process technologies will be developed to enhance not only high damping and but also significantly improve resistance to wear, erosion, fatigue, corrosion, and thermal protections of gas turbine engine compressor and turbine components.