INTERFACIAL DESIGN AND PROPERTIES OF LAYERED BN(+C) COATED NICALON FIBER-REINFORCED GLASS-CERAMIC MATRIX COMPOSITES

摘要

Nicalon fiber-reinforced glass-ceramic matrix composites with controlled fiber/matrix interfaces based on a layered BN(+C) concept have been developed. These composites have been shown to possess high strength and good creep, stress-rupture, and fatigue resistance to temperatures of 1100°C. The unique microstructure of the BN(+C) interfacial coating has been shown to be optimum for minimizing fiber/matrix interdiffusion and maximizing the toughness and high temperature environmental durability of the composites.