BSAS coatings were prepared on C/ SiC composite materials using air plasmas spraying technology.
And the oxidation resistance of BSAS coatings was investigated systemically. The results indicate that the weight varie-
ty of C/ SiC composite material sealed by coatings is just 1/7 of pure C/ SiC composite material under 1 400℃. Under
oxidation cycle condition (1 400℃ for 300 h), coatings fell off, and then we found that phase transformation ap-
peared from hexagonal to monoclinic phase.