Ti_3SiC_2/SiC复合材料的抗高温氧化性研究

Study on High Temperature Oxidation Resistence of Ti_3SiC_2/SiC Composites

采用反应热压烧结法制备Ti3SiC2/SiC复合材料,针对不同SiC含量的Ti3SiC2/SiC复合材料在1100～1500℃下恒温氧化20 h的氧化行为进行了研究。结果表明:(1)适量SiC的引入能有效的提高Ti3SiC2/SiC复合材料的抗高温氧化性能;(2)复合材料的氧化膜分内外两层,外层成分为TiO2,逐渐向内层过渡为TiO2和SiO2的混合物。

Ti3SiC2/SiC composites were fabricated by reactive hot pressing method.The isothermal oxidation behaviors of Ti3SiC2/SiC composites with different contents of SiC had been investigated at 1100-1500 ℃ in air for exposure time up to 20 h.The results showed that：（1）The oxidation resistance of composites can be improved when the content of SiC was added to composites;（2）The oxidized layers of the Ti3SiC2/SiC composites were composed of two layers：the outer layer of TiO2 and the inner layer of mixtures of TiO2 and SiO2.