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Effect of microstructure on the mechanical properties of PAN-based carbon fibers during high-temperature graphitization

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Abstract

The change of microstructure of PAN-based carbon fibers has been studied as a function of heat-treatment temperature (1,800–2,800 °C, stretching 0%) by Raman spectroscopy and X-ray diffraction. With increasing heat-treatment temperature, both the crystallite size (La, Lc) and the degree of preferred orientation (g) increase, while the crystallite interlayer spacing (d002) decreases. The values of both Rs and Rc decrease, while Rs decreases more quickly. It implies that the degrees of skin-core of the carbon fibers increase. The relationship between mechanical properties and microstructure of the variants is also explored in detail.

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Acknowledgements

The authors thank Professor He Fu for helpful discussions. The financial support of the National Ministries and Commissions Primary Foundation of China (grant no. 614002) is gratefully acknowledged.

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Authors and Affiliations

  1. Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan, 030001, People’s Republic of China

    Fujie Liu, Haojing Wang, Linbing Xue, Lidong Fan & Zhenping Zhu

  2. Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China

    Fujie Liu

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  1. Fujie Liu
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  2. Haojing Wang
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  3. Linbing Xue
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Correspondence to Fujie Liu.

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Liu, F., Wang, H., Xue, L. et al. Effect of microstructure on the mechanical properties of PAN-based carbon fibers during high-temperature graphitization. J Mater Sci 43, 4316–4322 (2008). https://doi.org/10.1007/s10853-008-2633-y

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