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Article Dans Une Revue Journal of the European Ceramic Society Année : 2016

Preparation of C/SiC ceramics using a preceramic polycarbosilane synthesized via hydrosilylation

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Fabien Bouzat
Romain Lucas
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  • PersonId : 923479
Sylvie Foucaud
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  • PersonId : 929166

Résumé

This paper deals with the preparation of C/SiC powders via the pyrolysis of a novel polycarbosilane, synthesized by hydrosilylation. The preceramic polymer structure was studied by 1H, 13C and 29Si NMR, and in situ dynamic IR analysis. A pyrolysis up to 1800 °C of this low molecular weight polymer led to β-SiC particles dispersed in a carbon matrix. The excess of free carbon was revealed by elemental analysis and High-Resolution TEM. The ceramization behavior was discussed thanks to TGA/DTA-MS, and XRD analyses. Thus, the crystallization was effective for pyrolysis temperatures above 1200 °C, and the ceramic yield reached a value of 62%. This present study highlights the potential of hydrosilylation to prepare C/SiC powders.
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Dates et versions

hal-01875197 , version 1 (17-09-2018)

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Citer

Fabien Bouzat, Alexandra-Raluca Graff, Romain Lucas, Sylvie Foucaud. Preparation of C/SiC ceramics using a preceramic polycarbosilane synthesized via hydrosilylation. Journal of the European Ceramic Society, 2016, 36 (12), pp.2913 - 2921. ⟨10.1016/j.jeurceramsoc.2015.11.032⟩. ⟨hal-01875197⟩
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