Synthesis of continuous silicon carbide fibre
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- Hasegawa, Y. J Mater Sci (1989) 24: 1177. doi:10.1007/BF02397045
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Polycarbosilanes which were synthesized by three methods were melt-spun and cured by heating at low temperatures in air. The curing mechanism and the structure of these cured fibres were studied and the relationship between the structure and the pyrolysis process is discussed. The structure of the cured fibre is represented by means of five structural elements and the rate of oxidation of the methyl group. The pyrolysis process of the cured fibre is discussed in five stages, and the effect of oxygen introduced into polycarbosilane fibre by curing on the pyrolysis process is clarified. The structure of the fibre obtained during the pyrolysis process strongly depends on the molecular weight of polycarbosilane.