通过观察C/C-SiC复合材料组元分布的扫描电子显微镜(SEM)照片,获得了C/C-SiC复合材料化学气相渗透(CVI)制备过程中产生孔隙和微裂纹的几何信息.在此基础上,建立了包含孔隙和微裂纹的C/C-SiC微结构有限元模型,并利用均匀化等效计算方法预测了平纹编织C/C-SiC复合材料的模量.针对CVI沉积方式制备的2组不同的C/C-SiC复合材料,实验测试与等效计算结果表明:基于SEM照片建立的C/C-SiC纤维束和复合材料微结构有限元模型,能够反映CVI工艺制备C/C-SiC中孔隙和微裂纹的分布状况;计算结果与实验数据有良好的一致性,数值计算可有效预测C/C-SiC编织复合材料的模量.
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