CCS and Power Systems
Advanced Energy Systems - Hydrogen Turbines
Ultra-High Temperature Thermal Barrier Coatings
Project No: SC0007544
Prior to this project, the use of yttrium aluminum garnet (YAG) materials as thermal barrier coatings (TBCs) has been limited by the difficulty of processing them with a sufficiently compliant microstructure to achieve the required strain tolerance and durability. This project will use a proprietary solution precursor plasma spray (SPPS) process—developed at the University of Connecticut (UConn) and demonstrated successfully on other materials such as yttria-partially stabilized zirconia (YSZ) —to fabricate YAG-based TBCs with markedly improved temperature characteristics relative to YSZ. In Phase I, the team demonstrated the feasibility of utilizing the SPPS process to deposit TBC coatings of sufficient thickness and desirable microstructures that yielded superior thermal cycling resistance compared with state-of-the-art air plasma sprayed (APS) YSZ coatings. In Phase II, HiFunda and UConn—working closely with major turbine manufacturers and coating service providers—will optimize the process, demonstrate that SPPS YAG TBCs can meet test criteria specified by the turbine manufacturers, and scale up the process to coat components for third party testing.