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对原位合成的(C-SiC-TiC-TiB2)碳/陶复合材料的等温抗氧化性能进行了研究。结果表明,该材料的氧化增重和失重主要取决于碳相和陶瓷相的氧化速率和氧化层的结构特征。该材料表现出优良的抗氧化能力,这归结于在800℃时TiB2优先氧化,800~1000℃时其表面生成了一层致密的硼硅酸盐玻璃,以及在1200℃下TiO2晶粒包裹在其表面。
The isothermal oxidation resistance of (C-SiC-TiC-TiB2) carbon / ceramic composites synthesized in situ was studied. The results show that the weight gain and weight loss of the material mainly depend on the oxidation rate of the carbon and ceramic phases and the structural characteristics of the oxide layer. The material exhibits excellent oxidation resistance due to the preferential oxidation of TiB2 at 800 ° C and the formation of a dense layer of borosilicate glass on the surface at 800-1000 ° C and the deposition of TiO2 grains at 1200 ° C Its surface.