根据C/SiC复合材料的结构特点及等温化学气相浸渗法的工艺特点,建立了C/SiC复合材料ICVI致密化过程的数学模型,并将该模型应用于C/SiC复合材料构件制备过程的数值模拟中.利用有限单元法,对航空发动机用C/SiC复合材料小喉衬的ICVI致密化行为进行了数值计算和分析.为了验证计算结果,设计并进行了相应的对比实验,对致密化后的喉衬构件进行了密度测量和CT断层扫描无损检测.实验结果与模拟结果呈现出相同的变化规律并且两者之间偏差较小,表明本文作者所建立的模型可以很好地描述C/SiC复合材料的ICVI过程.利用该数学模型,计算了ICVI过程中喉衬构件的密度分布及其演变规律,为ICVI法制备C/SiC复合材料构件的进一步研究打下基础,对ICVI工艺的优化具有一定的指导意义.
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