Introduction to Ceramic Matrix Composites in Aerospace Applications

Abstract

A review of ceramic matrix composites is presented as related to their type, use, and fabrication. Ceramic composites have the potential for high fracture toughness, resistance to catastrophic failure, high strength, low density, low thermal expansion, and high temperature capability and oxidation resistance. For continued development, there are a number of key technical needs including new refractory matrices, new stable fibers, and inert coatings for flbers, as well as affordable techniques which produce the desired composite properties and accomplish complex shape capability. A better materials understanding is necessary, including fiber/matrix interaction, and mechanics/structure/property relationships. Finally, technologies for transition to practice are required, including advanced materials characterization, component design methodology, large scale fabrication, attachment techniques, and nondestructive evaluation. While these composites are in the research and development stage, they offer the structural engineer excellent rigidity, high strength‐to‐weight ratio, high temperature capability and a noncatastrophic failure mode. Potential applications include turbine and internal combustion engines, aerospace structures, and high temperature leading edges and skins. A current application is the use of SiC whisker reinforced