C/C-BN-SiC composite was prepared by ceramic slurry infiltration combined with resin impregnation and carbonization, and the matrix with continuous distributed self-healing phase was obtained. In this study, the kinetic characteristics and oxidation behavior of the composites with various h-BN/SiC ratios in the temperature range of 600∼1300°C were studied by combining the isothermal oxidation test with the kinetic model. The optimal h-BN/SiC ratio balances the thermal stability and fluidity of the oxidized product, which not only has high thermal stability and low oxygen permeability to acts as an oxygen diffusion barrier but also has a certain fluidity to seal defects.

采用陶瓷浆料浸渗结合树脂浸渍和碳化的方法制备C/C-BN-SiC复合材料，得到具有连续分布的自愈合相的基体。本研究通过等温氧化试验与动力学模型相结合，研究了不同 h-BN/SiC 比的复合材料在 600～1300°C 温度范围内的动力学特性和氧化行为。最佳的h-BN/SiC比例平衡了氧化产物的热稳定性和流动性，不仅具有高热稳定性和低透氧性作为氧扩散屏障，而且具有一定的流动性来密封缺陷。