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Effects of ultra-high temperature treatment on the microstructure of carbon fibers

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Abstract

The microcrystalline structure and microvoid structure in carbon fibers during graphitization process (2300−2700 °C) were characterized employing laser micro-Raman scattering (Raman), X-ray diffraction (XRD), small angle X-ray scattering (SAXS), and high-resolution transmission electron microscopy (HR-TEM). The crystalline sizes (L a, L c) increased and interlayer spacing (d 002) decreased with increasing heat treatment temperature (HTT). The microvoids in the fibers grew up and contacted to the neighbors with the development of microcrystalline. In addition, the preferred orientation of graphite crystallite along fiber axis decreased and microvoids increased. The results are crucial for analyzing the evolution of microstructure of carbon fibers in the process of heat treatment and important for the preparation of high strength and high modulus carbon fibers.

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Authors and Affiliations

  1. Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Wei-wei Li, Hong-liang Kang, Jian Xu  (徐坚) & Rui-gang Liu  (刘瑞刚)

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Wei-wei Li

Authors
  1. Wei-wei Li
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  2. Hong-liang Kang
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  3. Jian Xu  (徐坚)
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  4. Rui-gang Liu  (刘瑞刚)
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Corresponding authors

Correspondence to Jian Xu  (徐坚) or Rui-gang Liu  (刘瑞刚).

Additional information

This work was financially supported by the National High Technology Research and Development Program of China (863 Program, No. 2015AA03A204).

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Li, Ww., Kang, Hl., Xu, J. et al. Effects of ultra-high temperature treatment on the microstructure of carbon fibers. Chin J Polym Sci 35, 764–772 (2017). https://doi.org/10.1007/s10118-017-1922-9

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  • DOI: https://doi.org/10.1007/s10118-017-1922-9

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