Experimental study conducted on thermo-oxidative degradation of composite-material specimens made of silicon carbide fibers in matrices of reaction-bonded silicon nitride. In SiC/Si3N4 composites of study, interphase is 3-micrometers-thick carbon-rich coat on surface of each SiC fiber. Thermo-oxidative degradation of these composites involves diffusion of oxygen through pores of composites to interphases damaged by oxidation. Nondestructive tests reveal critical exposure times.
Thermo-Oxidative Degradation Of SiC/Si3N4 Composites
NASA Tech Briefs ; 19 , 12
1995-12-01
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Englisch
Thermo-Oxidative Degradation of SiC-Si3N4 Composites
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