Structural evolutions from polycarbosilane to SiC ceramic |
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| Authors: | G. D. Soraru Florence Babonneau J. D. Mackenzie |
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| Affiliation: | (1) Department of Materials Science and Engineering, University of California, 90024 Los Angeles, California, USA;(2) Present address: Dipartimento di Ingegneria, Università di Trento, 38050 Mesiano, Trento, Italia;(3) Present address: Chimie de la Matière Condensée, Université Paris 6, Tour 54, 4 place Jussieu, 75005 Paris, France |
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| 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  -SiC and  -SiC; however, some difficulties in the identification of the crystalline phases have been pointed out. |
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