Processing and Characterization of Nano Silicon Carbide Ceramics via Precursor Pyrolysis

Abstract:

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Nano silicon carbide ceramics were prepared via precursor pyrolysis. Polycarbosilane (PCS) and divinylbenzene (DVB) were selected as a precursor to silicon carbide ceramics and a cross-linking reagent for PCS, respectively. The cross-linking properties and pyrolysis of PCS and DVB were investigated by changing the mass ratios of PCS/DVB. The mass ratio of PCS/DVB has a great effect on silicon carbide ceramic yield. The cured PCS/DVB with a mass ratio of 1:0.5 has the highest SiC ceramic yield (63.1%) at the temperature up to 1500 °C and its pyrolyzates consiste of nano silicon carbide with a diameter of 10-40 nm. The microstructures of the nano silicon carbide ceramics were characterized by SEM and XRD. The pyrolysis behavior of the cured PCS/DVB was characterized by thermogravimetry in nitrogen atmosphere.

Info:

Periodical:

Key Engineering Materials (Volumes 434-435)

Edited by:

Wei Pan and Jianghong Gong

Pages:

162-164

DOI:

10.4028/www.scientific.net/KEM.434-435.162

Citation:

D. L. Zhao et al., "Processing and Characterization of Nano Silicon Carbide Ceramics via Precursor Pyrolysis", Key Engineering Materials, Vols. 434-435, pp. 162-164, 2010

Online since:

March 2010

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Price:

$35.00

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