摘要
以国产T800级PAN基碳纤维为原料,通过调整石墨化温度和牵伸率,制备出拉伸强度3.8 GPa和拉伸模量450 GPa的石墨纤维。研究发现,拉伸模量随石墨化处理的温度升高和牵伸比的增加而提高,而其拉伸强度随牵伸比的增加而下降。进一步分析石墨化处理过程中纤维微观结构参数发现,微观有序化和高取向是制备高强高模石墨纤维的关键。
High modulus graphite fiber were through adjusting the graphitization temperature and draft ratio of domestic PAN based carbon fiber as raw material, prepared. The strength of the graphite fiber is 3.8 GPa and the modulus is 450 GPa. As the graphitization temperature and draft ratio increase, the modulus of PAN based graphitized fiber can be continuously improved, but the strength slightly decreases when higher draft ratio is used. We analyzed the micro structure parameters of the fiber during the graphitization, which showed that the key factors to make high strength, high modulus graphite fiber are microcosmic ordering and high orientation.
出处
《高科技纤维与应用》
CAS
2015年第5期52-54,共3页
Hi-Tech Fiber and Application
关键词
石墨纤维
石墨化温度
牵伸比
力学性能
制备研究
Graphite fiber
graphitization
graphitization temperature
draft ratio
mechanical properties
preparation
