Revolutionary Materials for Hypersonic Flight

Abstract : A team had been assembled to address challenges presented by future generations of hydrocarbon-fueled, long-range expendable missiles that operate up to Mach 7. The core issues involve robust materials and designs capable of sustaining pressure loads and extreme heat flux as well as shape-morphing components that allow efficient flight scenarios. The concepts invoke active cooling of the combustion system as well as passive cooling, through the use of heat pipes, of leading edges. The emphasis is on refractory alloys, coated to provide oxidation protection. Structural concepts leading to near-zero thermal expansion are also pursued. The document highlights the principal challenges and the key accomplishments of the program. Additional details are, found in the published papers, listed at the end of the document.