Advanced Lightweight Silicide and Nitride Based Materials for Turbo-Engine Applications

S. Drawin & J.F. Justin
Refractory metal silicides and nitride-based ceramics combine two properties that may lead to substantial reductions in aircraft fuel consumption: compared to the most advanced nickel-based superalloys presently used in aeronautical turbines, they can withstand higher temperatures and may have lower densities. Niobium silicide-based alloys and silicon nitride / molybdenum disilicide composites are currently being developed for turbine hot section components for both aircraft engines and land-based turbines. This paper presents the processing techniques, the microstructural...