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

Authors
Muller, A Gerstel, P Weinmann, M Bill, J Aldinger, F
Citation
A. Muller et al., Correlation of boron content and high temperature stability in Si-B-C-N ceramics, J EUR CERAM, 20(14-15), 2000, pp. 2655-2659
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
20
Issue
14-15
Year of publication
2000
Pages
2655 - 2659
Database
ISI
SICI code
0955-2219(200012)20:14-15<2655:COBCAH>2.0.ZU;2-0
Abstract
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 po lymeric precursors were prepared via hydroboration of poly(methylvinylsilaz ane) using different BH3. SMe2/polymer stoichiometries. High temperature th ermogravimetric analysis of as-pyrolysed ceramics as well as XRD studies of post-annealed samples display a retarding effect of boron on both crystall ization of SiC and Si3N4 and stabilization of crystalline beta -Si3N4. (C) 2000 Elsevier Science Ltd. All rights reserved.