均化法对短炭纤维均匀化效果及C/C复合材料性能的影响  

Influence of homogenization method on fiber homogeneous effect and properties of C/C composite

作　　者：郭领军[1] 李贺军[1] 李克智[1] 张东生[1] 

机构地区：[1]西北工业大学超高温复合材料国家重点实验室,西安710072

出　　处：《固体火箭技术》2009年第1期95-99,共5页Journal of Solid Rocket Technology

基　　金：国家杰出青年科学基金(50225210);国家自然基金(50572091)

摘　　要：采用模压半炭化成型工艺和普通压力机,在大气环境下制备出了短炭纤维增强沥青炭基C/C复合材料。借助无级变速搅拌机、材料万能试验机和电子扫描显微镜,研究了均化法对短炭纤维均匀化效果和C/C复合材料力学性能的影响。结果表明,在所试验的6种分散剂中,含有CPB和PVA的分散液不仅对PAN基炭纤维的分散性能较好,而且对炭纤维、沥青粉和焦炭颗粒也具有良好的均匀化效果;均化法对C/C复合材料的抗压强度具有重要的影响,就C/C复合材料的力学性能、制备成本和作业环境而言,湿混法的综合性能最好。By using mould semi-carbonization shaping technology and the ordinary pressing machine, the short carbon fiber reinforced pitch-carbon based C/C composites were prepared under atmospheric environment. The effects of homogenization methods on the homogeneous effect of short carbon fibers and the properties of C/C composite were investigated by means of stepless speed ehange mixer, universal material testing machine and SEM. The results show that the dispersant containing CPB and PVA has excellent effect not only on dispersing performance of PAN-based carbon fibers among six kinds of experimental dispersants, but also on homogenenous effect of carbon fibers, pitch powder and coke particles; the homogenization method plays an important role on the compressive strength of as-received C/C composites. By comparison of mechanical properties, manufacture cost, and working envi- ronments, comprehensive property of wet mixing method among the four kinds of mixing methods is optimal.

关 键 词：短炭纤维 纤维均匀化 C/C复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]