中南大学学报（自然科学版）2013，Vol.44Issue(2)：508-514,7.
ZrC质量分数对C/C-ZrC复合材料力学性能的影响
Influence of ZrC content on mechanical properties of C/C-ZrC composites
摘要
Abstract
To improve the ablation resistance of C/C composites in severe environment, C/C-ZrC composites were fabricated by inner-modification method. The structure and morphology of the composites were characterized by XRD, SEM and EDS analyses, and the effect of ZrC mass fraction on the fracture behavior of the composites was investigated by three-point bending tests. The results show that the introduced ZrC particles are distributed as nano-crystallites in C/C-ZrC composites. With the increase of ZrC mass fraction, the flexural strength of C/C-ZrC composites decreases gradually. As ZrC mass fraction improves to 36.64%, the fracture mode of the composites transforms from toughness to brittleness, and the transformation of the fracture mode is mainly contributed to the improved graphitization degree and reaction damage of the carbon fibers in the preparation process. After the heat treatment at 2 000 ℃ for 2 h, the brittleness behavior becomes more obviously.关键词
C/C复合材料/基体改性/ZrC/力学性能Key words
C/C composites/ inner-modification/ ZrC/ mechanical properties分类
通用工业技术引用本文复制引用
杨鑫,苏哲安,黄启忠,涂川俊,柴立元..ZrC质量分数对C/C-ZrC复合材料力学性能的影响[J].中南大学学报（自然科学版）,2013,44(2):508-514,7.基金项目
国家重点基础研究发展计划("973"计划)项目(2011CB605801) （"973"计划）
中央高校基本科研业务费专项资金资助(2012QNZT004) （2012QNZT004）
中南大学贵重仪器设备开放共享基金资助项目(CSUZC2012026) （CSUZC2012026）
