Microstructure and oxidation behavior of carbon fiber reinforced SiC composite (Cf/SiC) with Mo–57Si–10B oxidation protection coating

Mo–57Si–10B (at.%) coating was prepared by the spark plasma sintering (SPS) technique on a 2D woven Cf/SiC composite, and the oxidation behavior of the bare and the coated Cf/SiC samples at 1300 ​°C were investigated. The coating was composed of a fine MoSi2/MoB/SiO2/Mo2B5 out layer and the inner SiO2 interface layer. The mass gain percentage was approximately 0.25% after oxidation at 1300 ​°C for 100 ​h. The coated Cf/SiC substrate was effectively protected, owing to the rapid formation of the dense and protective borosilicate layer on the coating, the excellent microstructure stability of the coating and the inner SiO2 interface layer.