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含Si–O–C界面层的C/Si–C–N复合材料的抗氧化性能

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Abstract:

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1200℃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。

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