摘要
在不同温度下对聚丙烯腈基炭纤维(PAN CF)进行张力炭化处理并进行高温石墨化。研究结果表明:在炭化过程中, PAN CF的拉伸强度在1 400 ℃时达最大值,拉伸模量则随炭化温度的升高而增大;与炭化样品相比,PAN CF石墨化后的拉伸强度减小,拉伸模量增大;随着炭化温度的升高,微晶c轴方向堆叠厚度Lc 增大,层面间距d002减小; 炭化温度为1 400℃时,PAN CF在石墨化后,内部的炭颗粒排列得非常紧密,并且孔洞、裂纹、皮芯结构等缺陷很少;当炭化温度高于1 400℃时,石墨化后PAN CF内部有大量缺陷,使PAN CF的拉伸强度大大降低。
Polyacrylonitrile carbon fiber (PAN-CF) was tension carbonized at different temperatures and then graphitized. The results show that during the period of carbonization, the tensile strength of PAN-CF reaches the maximum at 1400°C, and the tensile modulus increases with the carbonization temperature increasing. The tensile strength decreases and the tensile modulus increases after the carbonized PAN-CF is graphitized. The larger Lc and lower d002 can be obtained at higher carbonization temperature. When PAN-CF is carbonized at 1400°C and then graphitized, the inert carbon particles are arranged tightly and the flaws, such as pore, crack and skin-core structure, are very few. But when the carbonization temperature exceeds 1400°C, there are many flaws in the graphitized PAN-CF and the tensile strength decreases rapidly.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第2期193-197,共5页
Journal of Central South University:Science and Technology
基金
国家重点工业性实验项目([1998]1817)
