Abstract
As precursor fiber of advanced SiC fiber, cured polycarbosilane (PCS) fiber is prepared, and thermostatic pyrolysis of this fiber is studied in detail. Since the weight change is the most important characteristic of the pyrolysis degree of cured PCS fiber, a precise balance is applied on-line to follow the weight change of the cured PCS fiber, which was carried out in a standing style furnace. In thermostatic pyrolysis, the degree of pyrolysis, which is characterized by the weight loss of the fiber, and the properties of the final SiC fibers were found to be strongly dependent on the process conditions such as N2 flow and the amount of fibers. From much evidence, it is the offgas evacuated in the process that plays an important role by accelerating pyrolysis and increasing pyrolysis degree.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Birot, M., Pillot, J. P. and Dunogues, J., “Comprehensive Chemistry of Polycarbosilanes, Polysilazanes, and Polycarbosilazanes as Precursors of Ceramics”,Chem. Rev.,95, 1443 (1995).
Bunsell, A. R. and Berger, M. H., “Fine Diameter Ceramic Fibres”,J. Eur. Ceram. Soc,20, 2249 (2000).
Cao, F, Kim, D. P., Ryu, J. H. and Li, X. D., “Modification of Polycarbosilane as a Precursor with High Ceramic Yield for Oxygen-Free SiC Fibers”,Korean J. Chem. Eng.,18(5), 761 (2001).
Feng, C. X., Liu, X. Y. and Yang, Y. M., “Preparation of Continuous Silicon Carbide Fiber”,J. National Univ. Defense Tech.,15(1), 66 (1993).
Hasegawa, Y, “Synthesis of Continuous Silicon Carbide Fibre, Part 6. Pyrolysis Process of Cured Polycarbosilane Fibre and Structure of SiC Fibre”,J. Mater. Sci.,24, 1177 (1989).
Shimoo, T., Ohata, K., Narisawa, M. and Okamura, K., “Mechanism of Conversion from Oxidation-cured Polycarbosilane to SiC Ceramic Fibers”,Ceram. Soc. Japan,102(10), 950 (1994).
Soraru, G. D., Baboneau, F. and Mackenzie, J. D., “Structural Evolutions from Polycarbosilane to SiC Ceramic”,J. Mater. Sci.,25, 3886 (1990).
Toreki, W., Batich, C. D., Sacks, M. D. and Saleem, M., “Polymer-derived Silicon Carbide Fibers with Low Oxygen Content and Improved Thermomechanical Stability”,Comp. Sci. Tech.,51, 145 (1994).
Yajima, S., Hasegawa, X, Hayashi, J. and Huma, M., “Synthesis of Continuous SiC Fibers with High Tensile Strength and Modulus”,J. Mater. Sci.,13, 2569 (1978).
Yajima, S., Hasegawa, Y. and Iimura, M., “Synthesis of Continuous Silicon Carbide Fibre. Part 2. Conversion of Polycarbosilane Fibre into Silicon Carbide Fibres”,J. Mater. Sci.,15, 720 (1980).
Yajima, S., Hayashi, J., Omori, M. and Okamura, K., “Development of a Silicon Carbide Fiber with High Tensile Strength”,Nature,261, 683 (1976).
Yajima, S., Okamura, K., Hayashi, J. and Omori, M., “Synthesis of Continuous SiC Fiber with High Tensile Strength”,J. Am. Ceram. Soc,59, 324 (1976).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, H., Li, Xd., Peng, P. et al. Thermostatic pyrolysis process of cured polycarbosilane fiber. Korean J. Chem. Eng. 20, 587–591 (2003). https://doi.org/10.1007/BF02705570
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02705570