Concurrent Design of a Multimaterial Niobium Alloy System for Next-generation Turbine Applications
Technology Description:
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.
Potential Impact:
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.