Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Flexibility of SiC-based Ceramic Fibers Synthesized from Polycarbosilane

폴리카보실란으로부터 제조된 SiC 기반 세라믹 섬유의 유연성

  • Joo, Young Jun (Fibrous Ceramics & Aerospace Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Cho, Kwang Youn (Fibrous Ceramics & Aerospace Materials Center, Korea Institute of Ceramic Engineering and Technology)
  • 주영준 (한국세라믹기술원 세라믹 섬유항공소재센터) ;
  • 조광연 (한국세라믹기술원 세라믹 섬유항공소재센터)
  • Received : 2019.09.01
  • Accepted : 2019.10.19
  • Published : 2019.10.31
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Abstract

Silicon carbide (SiC)-based ceramic fibers are converted from polycarbosilane (PCS) as a ceramic precursor. They are mainly fabricated via processes such as melt-spinning, oxidation-curing, and pyrolysis. The oxidation-curing method not only increases the ceramic yield, but also affects the flexibility of the ceramic fiber as it induces cross-linking in the PCSs. In this study, PCS was oxidation-cured, which depended on the temperature and time variables albeit not the effect of heating rate, and then converted to SiC-based ceramic fiber through pyrolysis. The cured PCS fibers were converted to circular ceramic fibers when the reaction degree (ΔSiH) increased to approximately 0.97; however, the converted SiC-based ceramic fibers showed low flexibility. After the oxidation-curing at $200^{\circ}C$ for 50 min, oxygen content diffused into the core of the PCS fibers. As a result, the reaction degree (${\Delta}SiH$) increased significantly, and flexible SiC-based ceramic fibers were fabricated.

Keywords

References

  1. M. Loos, "Carbon Nanotube Reinforced Composites", William Andrew, 2015, Chap. 2, pp.37-72.
  2. T. F. Cooke, "Inorganic Fibers-A Literature Review", J. Am. Ceram. Soc., 1991, 74, 2959-2978. https://doi.org/10.1111/j.1151-2916.1991.tb04289.x
  3. S. Schmidt, S. Beyer, H. Knabe, H. Immich, R. Meistring, and A. Gessler, "Advanced Ceramic Matrix Composite Materials for Current and Future Propulsion Technology Applications", Acta Astronaut., 2004, 55, 409-420. https://doi.org/10.1016/j.actaastro.2004.05.052
  4. R. Naslain, "Design, Preparation and Properties of Non-oxide CMCs for Application in Engines and Nuclear Reactors: An Overview", Compos. Sci. Technol., 2004, 64, 155-170. https://doi.org/10.1016/S0266-3538(03)00230-6
  5. S. Yajima, K. Okamura, J. Hayashi, and M. Omori, "Synthesis of Continuous SiC Fibers with High Tensile Strength", J. Am. Ceram. Soc., 1976, 59, 7-8.
  6. S. Yajima, Y. Hasegawa, J. Hayashi, and M. Iimura, "Synthesis of Continuous Silicon Carbide Fibre with High Tensile Strength and High Young's Modulus: Part 1. Synthesis of Polycarbosilane as Precursor", J. Mater. Sci., 1978, 13, 2569-2576. https://doi.org/10.1007/PL00020149
  7. Y. Hasegawa and K. Okamura, "Synthesis of Continuous Silicon Carbide Fibre: Part 3. Pyrolysis Process of Cured Polycarbosilane and Structure of Products", J. Mater. Sci., 1983, 18, 3633-3648. https://doi.org/10.1007/BF00540736
  8. T. Taki, K. Okamura, and M. Sato, "A Study of the Oxidation Curing Mechanism of Polycarbosilane Fibre by Solid-state High-resolution Nuclear Magnetic Resonance", J. Mater. Sci., 1989, 24, 1263-1267. https://doi.org/10.1007/PL00020205
  9. M. Takeda, Y. Imai, H. Ichikawa, N. Kasai, T. Seguchi, and K. Okamura, "Thermal Stability of SiC Fiber Prepared by an Irradiation-curing Process", Compos. Sci. Technol., 1999, 59, 793-799. https://doi.org/10.1016/S0266-3538(99)00010-X
  10. Y. Hasegawa, "New Curing Method for Polycarbosilane with Unsaturated Hydrocarbons and Application to Thermally Stable Sic Fibre", Compos. Sci. Technol., 1994, 51, 161-166. https://doi.org/10.1016/0266-3538(94)90186-4
  11. X. H. Mao, Y. C. Song, W. Li, and D. X. Yang, "Mechanism of Curing Process for Polycarbosilane Fiber with Cyclohexene Vapor", J. Appl. Polym. Sci., 2007, 105, 1651-1657. https://doi.org/10.1002/app.26226
  12. J. S. Hong, K. Y. Cho, D. G. Shin, J. I. Kim, S. T. Oh, and D. H. Riu, "Low-temperature Chemical Vapour Curing Using Iodine for Fabrication of Continuous Silicon Carbide Fibres from low-Molecular-weight Polycarbosilane", J. Mater. Chem. A, 2014, 2, 2781-2793. https://doi.org/10.1039/c3ta13727a
  13. H. Ichikawa, F. Machino, S. Mitsuno, T. Ishikawa, K. Okamura, and Y. Hasegawa, "Synthesis of Continuous Silicon Carbide Fibre: Part 5. Factors Affecting Stability of Polycarobsilane to Oxidation", J. Mater. Sci., 1986, 21, 4352-4358. https://doi.org/10.1007/BF01106555
  14. J. S. Hong, K. Y. Cho, D. G. Shin, J. I. Kim, and D. H. Riu, "Iodine Diffusion during Iodine-vapor Curing and Its Effects on the Morphology of Polycarbosilane/silicon Carbide Fibers", J. Appl. Polym. Sci., 2015, 132, 42687.
  15. H. Ichikawa, H. Yeranishi, and T. Ishikawa, "Efffect of Curing Conditions on Mechanical Properties of SiC Fibre (Nicalon)", J. Mater. Sci. Lett., 1987, 6, 420-422. https://doi.org/10.1007/BF01756783