三向正交预制体织造参数对C/C复合材料性能的影响  

Effect of three-directional orthogonal preform weaving parameters on properties of C/C composites

作　　者：邓奇林 杨敏[1] 姚彧敏 李红[1] 任慕苏[1] 孙晋良[1] DENG Qilin;YANG Min;YAO Yumin;LI Hong;REN Musu;SUN Jinliang(Composite Research Center of Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学复合材料研究中心,上海200444

出　　处：《材料工程》2022年第5期139-146,共8页Journal of Materials Engineering

基　　金：科技委基础加强项目(2017-JCJQ-ZD-035);上海市教育发展基金会和上海市教育委员会“曙光计划”(18SG34)。

摘　　要：以Z向间距不同的三向正交结构预制体为研究对象,采用化学气相渗透和浸渍树脂相结合的工艺制备碳/碳(C/C)复合材料,研究织造参数对C/C复合材料微观结构和弯曲性能的影响。以三向正交预制体最小的重复结构为单元建立计算模型,获得三向正交预制体纤维含量与织造参数的关系式并进行验证,结果表明:Z向纤维间距及X,Y向纤维层间距越小,预制体纤维含量越高;Z向纤维间距越大,纤维交织处扭曲变形大,预制体孔隙结构发生变化;相同致密化工艺下,孔隙结构的变化影响C/C复合材料中基体碳的组成和分布,对基体碳形貌无影响;X,Y向纤维含量越高,Z向纤维间距越小,致密后的C/C复合材料弯曲强度越高。Taking the three-directional orthogonal preform with different Z-direction fiber distance as the research object,the carbon/carbon(C/C)composites were prepared by the combination of chemical vapor infiltration and resin impregnation,and the effect of weaving parameters on the microstructure and bending performance of C/C composites were studied.The calculation model was established by taking the smallest repeated structure of three-directional orthogonal preform as a unit,and the relationship between fiber content and weaving parameters of three-directional preform was obtained and verified.The results show that the fiber content of preform is increased with the decrease of Z-direction fiber distance and X,Y-direction fiber layer distance;when the Z-direction fiber distance is increased,the twist deformation of the fiber interweave becomes larger,resulting in the change of the pore structure of the preform;under the same densification process,the change of pore structure affects the composition and distribution of carbon matrix in C/C composites,but has no effect on the morphology of carbon matrix;when the fiber content in X,Y-direction is increased and the distance between fibers in Z-direction is decreased,the flexural strength of the C/C composites is higher.

关 键 词：三向正交预制体 织造参数 纤维含量 微观形貌 弯曲性能 

分 类 号：TB332[一般工业技术—材料科学与工程]