Abstract
By the reaction between organosilicon compounds and titanium alkoxides, polymers (atom ratio Ti/Si = 0.045 to 0.12) as the precursors for ceramic fibre were synthesized. Titanium in the precursors was bonded to organosilicon compounds in the Si-O-Ti bond. The synthesis process of the fibre is melt-spinning of the precursor, curing of the precursor fibre, and its heat-treatment. Curing was achieved by cross-linking of the polymer by the oxidation of Si-H bonds or hydrolysis of Ti-OR bonds in the precursor. The formation mechanism of the precursors and their pyrolysis process were examined in an inert gas atmosphere and in a vacuum. It was shown that the Si-O-Ti bond in the precursors is cleaved by pyrolysis of the Ti-O bond, so that TiC is formed. The tensile strength of the ceramic fibre obtained, is relatively high even by the heat-treatment at temperatures higher than 1200° C. Further, the Young's modulus is little changed.
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Song, YC., Hasegawa, Y., Yang, SJ. et al. Ceramic fibres from polymer precursor containing Si-O-Ti bonds. J Mater Sci 23, 1911–1920 (1988). https://doi.org/10.1007/BF01115750
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DOI: https://doi.org/10.1007/BF01115750