Correlation of boron content and high temperature stability in Si–B–C–N ceramics

The preparation and characterization of precursor derived Si–B–C–N ceramics with similar Si/C/N ratios but variable boron content are reported. The polymeric precursors were prepared via hydroboration of poly(methylvinylsilazane) using different BH 3·SMe 2/polymer stoichiometries. High temperature t...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2000-12, Vol.20 (14), p.2655-2659
Main Authors: Müller, Anita, Gerstel, Peter, Weinmann, Markus, Bill, Joachim, Aldinger, Fritz
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Precursors-organic
Silazanes
Si–B–C–N
Stability
Structural ceramics
Technical ceramics
Thermal properties
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Summary:The preparation and characterization of precursor derived Si–B–C–N ceramics with similar Si/C/N ratios but variable boron content are reported. The polymeric precursors were prepared via hydroboration of poly(methylvinylsilazane) using different BH 3·SMe 2/polymer stoichiometries. High temperature thermogravimetric analysis of as-pyrolysed ceramics as well as XRD studies of post-annealed samples display a retarding effect of boron on both crystallization of SiC and Si 3N 4 and stabilization of crystalline β-Si 3N 4.
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(00)00131-X