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采用高速均质剪切法制备CE/SiC纳米复合材料,通过力学性能测试、热失重(TGA)分析和动态力学能谱(DMA)分析,考察了纳米SiC不同含量对其性能的影响。结果表明,纳米SiC能有效改善CE的静态力学性能、热稳定性和耐热性。相对纯CE,当纳米SiC含量为1.00%时,复合材料冲击强度的提高率为73.78%,弯曲强度的提高率20.84%;失重5%时,热分解温度的提高率为12.31%;500℃时,质量保持率提高为6.48%;玻璃化转变温度的提高率为13.09%。
The CE / SiC nanocomposites were prepared by high speed homogeneous shear method. The mechanical properties, thermal gravimetric analysis (TGA) and dynamic mechanical energy dispersive spectroscopy (DMA) were used to investigate the effect of different content of nano-SiC on the properties. The results show that nano-SiC can effectively improve the static mechanical properties of CE, thermal stability and heat resistance. Compared with pure CE, when the content of nano-SiC is 1.00%, the improvement rate of impact strength of composite is 73.78% and the increase rate of bending strength is 20.84%. The rate of increase of thermal decomposition temperature is 12.31% when weight loss is 5% , The quality retention rate increased 6.48%; the glass transition temperature increase rate was 13.09%.