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A Novel Oxidation Resistant SiC/B4 C/C Nanocomposite Derived from a Carborane-Containing Conjugated Polycarbosilane.
- Source :
- Journal of the American Ceramic Society; Jan2012, Vol. 95 Issue 1, p71-74, 4p, 1 Black and White Photograph, 1 Diagram, 1 Chart, 3 Graphs
- Publication Year :
- 2012
-
Abstract
- A novel oxidation resistant SiC/B<subscript>4</subscript> C/C nanocomposite was prepared by the pyrolysis of carborane-containing poly(silyleneethynylenephenyleneethynylene) ( CB- PSEPE) at 1450°C in argon. The phase composition and microstructure of the carbon-rich ceramic were investigated by X-ray diffraction, Raman spectroscopy and transmission electron microscopy. The β- SiC (~12 nm) and B<subscript>4</subscript> C (~20 nm) nanocrystalline phases were formed during the pyrolysis process of CB- PSEPE. The presence of boron in CB- PSEPE promotes the growth of β- SiC nanocrystals. The ceramic shows excellent thermooxidative stability based on thermogravimetric analysis in air. A borosilicate layer was formed on the surface of the ceramic after oxidation. This carborane-containing conjugated polycarbosilane could be a potential precursor for oxidation resistant carbon-based materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 95
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 70094483
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2011.04972.x