C/C复合材料液相浸渍制备工艺及其力学性能模拟  

Simutations of manufacturing process and mechanical properties of C/C composites during liquid-phase impregnation manufacturing process

作　　者：梁军[1] 卢琦[1] 阚晋[1] 陈海龙 

机构地区：[1]哈尔滨工业大学复合材料与结构研究所,哈尔滨150080

出　　处：《复合材料学报》2011年第3期159-166,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(N10772060;90916027);黑龙江省杰出青年基金(JC2006-13)

摘　　要：针对酚醛先驱体C/C复合材料液相浸渍制备工艺各组分相的化学转化特性,基于Arrhenius方程建立了C/C复合材料液相浸渍制备工艺力学模型,详细分析了固化-炭化和石墨化两个重要的工艺阶段各组分相的体积变化规律,得到的气孔体积分数与Micro-CT系统扫描处理的细编穿刺C/C复合材料微结构图像中气孔体积分数相吻合,并结合均匀化方法对制备过程材料基体有效弹性模量进行了预测。结果表明:材料基体的有效弹性模量随着致密化次数的增加而增大,在每一次致密化过程中材料基体的有效弹性模量先增大后减小,石墨化工艺过程中材料基体的有效弹性模量达到某一值后保持平稳。Based on the chemical conversion properties of the constituents of phenolic-based C/C composites during liquid-phase impregnation process and Arrhenius equation,the manufacturing process mechanical model for C/C composites was established.The variations of volume fraction of different component phases in two important stages of solidification-carbonization and graphitization were analyzed.The volume fraction of pores obtained by simulations is in a good agreement with the experimental results obtained by image processing of Micro-CT system for the actual fine-woven punctured C/C composites.Combined with homogenization method,the effective elastic modulus of matrix during manufacturing process was predicted.The results show that the effective elastic modulus of matrix increases with the increasing of the densification times.The elastic modulus of matrix in each densification process increases first and then decreases.After solidification process,the elastic modulus of matrix approaches a stable value.

关 键 词：C/C复合材料 液相制备工艺 均匀化方法 有效弹性模量 MICRO CT 

分 类 号：TB330.1[一般工业技术—材料科学与工程]