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In a high-temperature environment, polyacrylonitrile-based carbon fiber (PAN-CF) can be deformed by stretching, where the stretching deformation ability of PAN-CF is enhanced with the increase of the temperature. Further, the hightemperature stretching deformation of PAN-CF directly affects the control of the carbon crystalline orientation. Based on the techniques of high-resolution transmission electron...
PAN-based carbon fibers were subjected to high temperature heat treatment (HTT) at 1500–2500°C and the evolution of the skin-core structure of the carbon fibers was investigated by elemental analysis, XRD, TEM and Raman spectroscopy. Results showed that nitrogen content and d 002 decreased, and carbon content and La increased with HTT temperature. La increased sharply with temperature above...
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