在先驱体转化陶瓷基复合材料的制备中,坯体在裂解前后的体积发生变化.引入体系体积收缩率参数,对单一先驱体转化纤维增强陶瓷基复合材料致密化模型进行了修正.同时,分别对含惰性填料和/或活性填料的先驱体浆料浸渍-裂解纤维增强陶瓷基复合材料致密化进行了模型分析.从理论上揭示了复合材料的浸渍-裂解周期与材料的理论密度和理论孔隙率之间的关系.当先驱体浆料中含有活性填料时,复合材料的理论密度和理论孔隙率与活性填料的反应陶瓷产率、反应密度比、体积收缩率有密切的数学关系.在先驱体中引入活性填料比引入惰性填料能更为有效地提高材料的密度,降低材料的孔隙率.
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