Advanced Nb-based Intermetallics for Nuclear Applications

This project will evaluate and develop an innovative class of refractory-metal intermetallic composites as alternatives to the refractory, ceramic, and composite materials presently used or being considered for very high temperature applications in Generation IV nuclear energy systems. In addition to providing a superior very-high-temperature performance potential, these niobium-based intermetallics could offer significant cost savings over conventional refractory alloys. In Phase I, an advanced reactive metal casting technology will be applied to fabricate test samples of near-net composites for evaluation and mechanical testing. Also, the microstructure-properties of these intermetallic alloys will be assessed, leading to properties tailored to the performance and cost goals of nuclear reactor system components. Commercial Applications and other Benefits as described by the awardee: The development of Nb-based intermetallic composites should lead to revolutionary nuclear and fossil energy turbine and propulsion performance. For example, the use of these alloys in nuclear reactors and industrial gas turbines would increase energy efficiency through higher reactor/turbine operating temperatures. Furthermore, the application of these materials in aircraft engines would provide society with faster, more convenient, and yet still economical ways for global travel.