X-ray diffraction analysis of the fine structure of carbon fiber

X-ray diffraction analysis showed that the material of carbon fibers prepared from polyacrylonitrile is heterogeneous. Its component composition is determined by the fiber preparation conditions and depends on the angle at which the coherent scattering domains are oriented relative to the thread axis. The size of coherent scattering domains increases in going to components corresponding to lower d002 values and depends on the orientation angle φ relative to the thread axis.