A new generation of refractory material systems with significant incre
ases in temperature capability is required to meet the demands of futu
re aerospace applications. Such materials require a balance of proper
ties such as low-temperature damage tolerance, high-temperature streng
th, creep resistance, and superior environmental stability for impleme
ntation in advanced aerospace systems. Systems incorporating niobium-b
ased beta alloys and intermetallic compounds have the potential for me
eting these requirements.