Mullite interfacial coatings for SiC fibers

A process for depositing CVD mullite on SiC fibers for enhanced oxidation and corrosion protection and/or to act as an interfacial barrier coating has been developed. Process optimization via systematic investigation of system parameters yielded uniform, crystalline mullite coatings on SiC fibers. Structural characterization has allowed for tailoring of coating structure and therefore properties. Preliminary high temperature oxidation/corrosion testing of the optimized coatings has shown that the coatings remain adherent and protective for extended periods.