采用溶胶-凝胶法合成了Ba0.5Sr0.5Al2Si2O8(BSAS)-Y2Si2 O7粉体,并以2D Cf/SiC为基体,采用浆料涂覆工艺在其表面制备了BSAS-Y2Si2O7环境屏障涂层,表征了涂覆与未涂覆BSAS-Y2Si2O7涂层Cf/SiC复合材料的抗水氧腐蚀性能.结果表明:在高纯氩气保护下,经1450℃高温烧结3h,可在Cf/SiC试样表面制备致密的BSAS-Y2Si2O7涂层;在1250℃、50％H2O-50％O2、常压静态气氛下腐蚀200 h后,涂覆BSAS-Y2Si2O7涂层的Cf/SiC试样的质量基本不变,基体中的纤维得到了很好的保护,所制备的BSAS-Y2Si2O7涂层具有较好的抗水氧腐蚀性能;同时,BSAS-Y2Si2O7涂层也表现出裂纹自愈合能力;与之相比,未涂覆BSAS-Y2Si2O7涂层的Cf/SiC试样的失重较为明显,基体中的纤维已经完全被水氧环境所侵蚀.
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