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Changes in Mechanical Properties of Graphite Blocks Fabricated Using Natural Graphite as a Filler by Adding 3-mm Chopped Carbon Fiber

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Abstract

The present study examined changes in the mechanical properties of natural graphite-based graphite blocks resulting from the addition of 3-mm chopped-carbon fiber (cCF). 0–1.2 wt.% of cCF was added as a filler to a mixture of natural graphite, and phenol as a binder. The amount of natural graphite was reduced with increasing content of cCF. The obtained mixture was subjected to uniaxial compression molding and then carbonization in an inert atmosphere to fabricate graphite blocks. As the cCF content of the graphite blocks increased from 0 wt.% to 1.2 wt.%, their density decreased while the porosity increased. Overall, the addition of cCF led to an improvement in the mechanical properties of the graphite blocks; the best performance was achieved when the cCF content was 0.8 wt.%. Its hardness and flexural strength were improved by about 27% and 60%, respectively.

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Acknowledgements

This research was funded by the National Research Foundation of Korea (grant number: NRF-2018R1A6A1A03025761). This work was also supported by the Technology Innovation Program (20011661) funded by the Ministry of Trade, Industry & Energy of Korea.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, 39177, South Korea

    Sang-Hye Lee, Jin-Kyu Lim & Jae-Seung Roh

  2. Advanced Material Research Center, Kumoh National Institute of Technology, Gumi, 39177, South Korea

    Gibeop Nam

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  1. Sang-Hye Lee
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Correspondence to Jae-Seung Roh.

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Lee, SH., Lim, JK., Nam, G. et al. Changes in Mechanical Properties of Graphite Blocks Fabricated Using Natural Graphite as a Filler by Adding 3-mm Chopped Carbon Fiber. Fibers Polym 24, 2083–2091 (2023). https://doi.org/10.1007/s12221-023-00194-9

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