Infusiblization of Iodine Doped Polycarbosilane for Silicon Carbide Fiber Fabrication 


Vol. 53,  No. 6, pp. 409-413, Dec.  2016
10.12772/TSE.2016.53.409


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  Abstract

Low molecular polycarbosilane (PCS) is used as raw material in the fabrication of continuous silicon carbide (SiC) fiber at a relatively low temperature using a low pressure stabilization method with iodine vapor. The low stabilization temperature provides a good environment to use the low molecular PCS for the melt-spun process, which has good spinnability, but also has many difficulties with the conventional oxidation curing method due to the low softening point of PCS. However, SiC fibers fabricated from the low molecular PCS have shown poor mechanical properties. In this study, we are aiming to improve those mechanical properties and fabricate high strength SiC fibers from low molecular PCS using the low pressure stabilization method. The ceramic yield of iodine doped PCS was increased in proportion to the iodine content after stabilization according to thermogravimetric analysis, and exhibits more than twice the tensile strength than fibers fabricated from as-received PCS.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

한국연구재단 우수등재학술지 유지 (2022년)