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Synthesis of SiC microtube with villus-like morphology and SiC fiber

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Abstract

Silicon carbide (SiC) microtubes were synthesized and characterized via a vapor–solid (VS) reaction of carbon fiber (Csolid) and SiO(gas). The synthesis mechanisms were investigated. The precursor led complete conversion of [SiO(gas) + C(solid)] into [SiC(solid) + CO(gas)] through overall reaction under inert gas flow at and above 1350 °C. Carbon fibers with small surface area (0.7–2.0 m2 g-1) were gradually converted to SiC microtubes with large specific surface area (45–63 m2 g-1). Inner surface of SiC microtubes indicated a villus-like morphology, which consisted of submicron-sized SiC villi. The outer surface of the SiC microtubes was smooth. Inner surface morphology of SiC microtubes was dependent upon synthesizing temperature. Thickness of villus-like layer in SiC microtubes increased with increasing synthesizing temperature, showing 0.25 and 0.5 at 1350 and 1400 °C, respectively. Both VS and gas–liquid–solid (VLS) growth mechanisms were investigated in synthesis of SiC fiber as a reaction byproduct, and the reaction was governed by both growth mechanisms.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Changwon National University, Changwon, Kyungnam, 641-773, Republic of Korea

    Jae-Won Kim, Seoung-Soo Lee & Yeon-Gil Jung

  2. High Temperature Materials Group, Korea Institute of Machinery and Materials, Changwon, Kyungnam, 641-010, Republic of Korea

    Baig-Gyu Choi & Chang-Yong Jo

  3. Department of Ceramic Engineering, Hanyang University, Seoul, 133-791, Republic of Korea

    Paik Ungyu

Authors
  1. Jae-Won Kim
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  2. Seoung-Soo Lee
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  3. Yeon-Gil Jung
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  4. Baig-Gyu Choi
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  5. Chang-Yong Jo
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  6. Paik Ungyu
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Correspondence to Baig-Gyu Choi.

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Kim, JW., Lee, SS., Jung, YG. et al. Synthesis of SiC microtube with villus-like morphology and SiC fiber. Journal of Materials Research 20, 409–416 (2005). https://doi.org/10.1557/JMR.2005.0049

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  • DOI: https://doi.org/10.1557/JMR.2005.0049

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