中文摘要：

为了研究利用Si–O–C界面层来提高碳纤维增强陶瓷基复合材料的抗氧化性能,利用化学气相浸渗和聚合物浸渗裂解工艺制备了以Si–O–C为界面的碳纤维增强Si–C–N陶瓷基复合材料（C/Si–O–C/Si–C–N）和无界面层的碳纤维增强Si–C–N陶瓷基复合材料（C/Si–C–N）。研究了C/Si–O–C/Si–C–N和C/Si–C–N在600、900℃和1 200℃空气环境中的氧化行为。结果表明：采用Si–O–C界面层后可提高复合材料的抗氧化性能;Si–O–C界面层较高的氧化抗力是碳纤维增强Si–C–N复合材料抗氧化性能提高的主要原因。

英文摘要：

In order to improve oxidation resistance of carbon fiber reinfbrced ceramic matrix composites, a carbon fiber reinforced Si-C-N matrix composite with a Si-O-C interlayer （C/Si-O-C/Si-C-N） was fabricated via chemical vapor infiltration and polymer impregnation and pyrolysis process. The oxidation behaviors of the C/Si-O-C/Si-C-N and the carbon fiber reinforced Si-C-N com- posite without interphase （C/Si-C-N） were investigated in air at 600, 900 and 1 200℃, respectively. The results indicate that the oxidation resistance of C/Si-O-C/Si-C-N is improved by Si-O-C interphase compared to C/Si-C-N. The higher oxidation resistance of C/Si-O-C/Si-C-N is attributed to the higher inoxidizability of Si-O-C interlayer.