Study of the Surface Morphology and the Microstructure of PAN-Based Carbon Fibers
The microstructure of two kinds of self-made PAN-based high-modulus carbon fibers (HMCF-1, HMCF-2) was studied by scanning electron microscopy (SEM), Raman spectroscopy, X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM), and was compared with that of T800 and M55J. The correlation of XRD and HRTEM in terms of graphite crystallite sizes and interlayer spacing of graphite layer was also investigated. The results show that the diameters of T800, HMCF-1 and HMCF-2 are almost the same (~5.20μm) and all of them are lager than that of M55J (~4.86μm). The crystal sizes and the degree of graphitization are in the order of HMCF-2>HMCF-1>M55J>T800, while the regularity of the lattice fringes of HMCF-2 is better than those of others.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
X. J. Zhang et al., "Study of the Surface Morphology and the Microstructure of PAN-Based Carbon Fibers", Advanced Materials Research, Vols. 239-242, pp. 1279-1282, 2011