Multilayered Thermal and Environmental Barrier Coatings for Naval Gas Turbine Engines.
Abstract
UVa has identified an EBC system for protecting rotating SiC components in steam rich gas turbine engine environments at temperatures to 1316 oC (2400 oF). It consists of a silicon-HfO2 bond coat and a steam erosion resistant Yb2Si2O7 – HfO2 topcoat to slow oxidizer diffusion to the bond coat surface. The HfO2 increases the creep resistance of both layers, and results in a Hafnon TGO layer which remains protective (does not crack). A HfO2 thermal barrier coating concept is proposed for reducing the temperature at which thermochemical transformations occur in the EBC system.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512756
Entities
People
- H.N.G. Wadley
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia