Concurrent Design of a Multimaterial Niobium Alloy System for Next-generation Turbine Applications
QuesTek Innovations will apply computational materials design, additive manufacturing (AM), coating technology, and turbine design/manufacturing to develop a comprehensive solution for a next-generation turbine blade alloy and coating system capable of sustained operation at 1300°C. QuesTek will design a niobium (Nb)-based multimaterial alloy system consisting of a ductile, precipitation-strengthened, creep (deformation)-resistant alloy for the turbine “core” combined with an oxidation-resistant, bond coat-compatible Nb alloy for the “case.” AM techniques, such as directed energy deposition, will enable fabrication of a turbine blade structure with composition and microstructure tailored to resolve the inherent conflict between mechanical performance and oxidation resistance. A novel coating system with thermal and chemical properties compatible with the underlying alloy will be developed to provide environmental and thermal protection.
Combining development of new ultrahigh temperature materials with compatible coatings and manufacturing technologies has the potential to increase gas turbine efficiency up to 7%, which will significantly reduce wasted energy and carbon emissions.