与预制件相比，复合材料内部的纱线结构发生了变化，这种变化也体现在纤维体积分数以及其它结构参数上。
The final yarn structures in composites have changed comparing with those in the preforms after which are impregnated with matrix and consolidated into the final shape.
本文用拓扑分析方法，对预制件结构做了说明，并对工艺参量进行了理论预测，为设计功能复合材料和特殊结构复合材料提供了新的手段。
The structure of preform is described, the processing parameters are predicted in theory and the designs of functional and structural composites are provided by the method of topological analysis.
利用SEM和TEM等方法对晶须预制块和复合材料进行了微观组织结构分析。
Microstructures of the preform and the composite were analyzed under SEM and TEM.
利用SEM和TEM等方法对晶须预制块和复合材料进行了微观组织结构分析。
Microstructures of the preform and the composite were analyzed under SEM and TEM.
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