FIBER-REINFORCED CERAMIC AND PROCESS THEREFOR

摘要

A composite ceramic with excellent resistance to fracture or other catastrophic mechanical failure under stress car be made by pressing silicon powder around a reinforcing array of silicon carbide fibers, then converting the silicon to silicon nitride by reaction bonding with nitrogen gas at temperatures below the melting point of silicon. under favorable conditions, when high volume fractions of fibers with a mutually parallel orientation can be accommodated within the final composite, maximum bending stress values of more than 800 megapascals and work of fracture values of about 10 joules per square centimeter can be achieved.