Structural heterogeneity and its influence on the tensile fracture of PAN-based carbon fibers

Abstract

This communication reported an intuitive and convenient approach to detect the structural heterogeneity of carbon fibers by using Raman spectroscopy. As indicated by both the linear and mapping modes, the skin–core difference was enhanced with the rising temperature during the graphitization. This enhanced structural heterogeneity was observed to strongly influence the tensile fracture mode and the tensile properties of the graphitized fibers.