Advanced Nb-based Intermetallics for Nuclear Applications

Niobium-based intermetallic composites can lead to revolutionary nuclear and fossil energy turbine and propulsion performance. In addition to superior high-temperature performance, niobium-based intermetallics could offer significant cost savings over conventional refractory alloys. This project will expand research and developmental efforts on this innovative class of refractory metal intermetallic composites, providing alternatives to the refractory, ceramic, and composite materials that are presently used or being considered for high temperature applications in Generation IV nuclear energy systems. In Phase I, a preliminary analysis of the microstructure- properties of these alloys was conducted, which will serve as a baseline for nuclear reactor-specific requirements. Phase II will explore alloy compositions that are most suitable for irradiated reactor environments. Both non-irradiated and irradiated materials will be tested to demonstrate the potential of these alloys for nuclear systems.Commercial Applications and other Benefits as described by the awardee: The use of these alloys in nuclear reactors and industrial gas turbines should provide an opportunity to increase energy efficiency through higher reactor/turbine operating temperatures. This in turn will help to reduce dependence on fossil fuel in power generation, allowing for continued economic growth worldwide without the associated environmental damage