Oxidation and Fracture in a SiC/Si_3N_4 Composite at Elevated Temperature

摘要

The superior high temperature performance of both silicon carbide and silicon nitride has made SiC fiber reinforced Si_3N_4 matrix composite a candidate material for components of advanced aerospace propulsion systems, including turbine blades. In addition to mechanical behavior, oxidation is always a concern for non-oxide ceramics when used in an oxidizing atmosphere. In this paper, a study on the high temperature damage behavior of a undirectional SiC fiber reinforced Si-3N_4 composite is reported.