Abstract
The pyrolysis process of a polycarbosilane into a microcrystalline silicon carbide ceramic has been followed up to 1700 ° C mainly by means of solid state29Si and13C nuclear magnetic resonance, transmission electron microscopy and X-ray diffraction analysis. A structural model has been proposed for the amorphous silicon carbide phase that is formed during the pyrolysis process. The ceramic obtained at high temperature is formed by a mixture of β-SiC and α-SiC; however, some difficulties in the identification of the crystalline phases have been pointed out.
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Soraru, G.D., Babonneau, F. & Mackenzie, J.D. Structural evolutions from polycarbosilane to SiC ceramic. J Mater Sci 25, 3886–3893 (1990). https://doi.org/10.1007/BF00582455
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DOI: https://doi.org/10.1007/BF00582455