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Silazane derived ceramics and related materials

Kroke, Edwin and Li, Ya-Li and Konetschny, Christoph and Lecomte, Emmanuel and Fasel, Claudia and Riedel, Ralf (2000):
Silazane derived ceramics and related materials.
In: Materials Science and Engineering: R: Reports, Elsevier, pp. 97-199, 26, (4-6), ISSN 0927796X,
[Online-Edition: http://dx.doi.org/10.1016/S0927-796X(00)00008-5],
[Article]

Abstract

This review highlights the synthesis, processing and properties of non-oxide silicon-based ceramic materials derived from silazanes and polysilazanes. A comprehensive summary of the preparation of precursor compounds containing Si–N–Si units, including commercially available materials, is followed by the discussion of various processing techniques. The fabrication of dense bulk ceramics in the Si/E/C/N systems is reported which involves cross-linking of the polymeric ceramic precursor followed by a polymer-to-ceramic transformation step. The cross-linked precursor can be milled, compacted and pyrolysed to form dense, additive-free, amorphous silicon carbonitride monoliths or polycrystalline composites which withstand oxidation in air at 1600°C. Furthermore, an overview is given on the fabrication of silazane derived powders and coatings involving chemical vapour deposition (CVD) methods utilising volatile precursors. Fibre spinning and fibre properties, as well as other processing techniques like infiltration of preforms, the preparation of porous ceramics and joining are briefly discussed. A state of the art of the mechanical properties of polymer derived amorphous Si/C/N and Si/B/C/N ceramics with respect to hardness as well as high-temperature creep and oxidation resistance is summarised. Finally, some important aspects of industrial applications will be considered. The review is in part based on our own work related to the polysilazane derived ceramics, but will also cover a comprehensive state of the art including the published literature in this field.

Item Type: Article
Erschienen: 2000
Creators: Kroke, Edwin and Li, Ya-Li and Konetschny, Christoph and Lecomte, Emmanuel and Fasel, Claudia and Riedel, Ralf
Title: Silazane derived ceramics and related materials
Language: English
Abstract:

This review highlights the synthesis, processing and properties of non-oxide silicon-based ceramic materials derived from silazanes and polysilazanes. A comprehensive summary of the preparation of precursor compounds containing Si–N–Si units, including commercially available materials, is followed by the discussion of various processing techniques. The fabrication of dense bulk ceramics in the Si/E/C/N systems is reported which involves cross-linking of the polymeric ceramic precursor followed by a polymer-to-ceramic transformation step. The cross-linked precursor can be milled, compacted and pyrolysed to form dense, additive-free, amorphous silicon carbonitride monoliths or polycrystalline composites which withstand oxidation in air at 1600°C. Furthermore, an overview is given on the fabrication of silazane derived powders and coatings involving chemical vapour deposition (CVD) methods utilising volatile precursors. Fibre spinning and fibre properties, as well as other processing techniques like infiltration of preforms, the preparation of porous ceramics and joining are briefly discussed. A state of the art of the mechanical properties of polymer derived amorphous Si/C/N and Si/B/C/N ceramics with respect to hardness as well as high-temperature creep and oxidation resistance is summarised. Finally, some important aspects of industrial applications will be considered. The review is in part based on our own work related to the polysilazane derived ceramics, but will also cover a comprehensive state of the art including the published literature in this field.

Journal or Publication Title: Materials Science and Engineering: R: Reports
Volume: 26
Number: 4-6
Publisher: Elsevier
Uncontrolled Keywords: Silazane, Polysilazanes, Cross-linking, Silazane derived ceramics, Chemical vapour deposition
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 22 May 2012 07:16
Official URL: http://dx.doi.org/10.1016/S0927-796X(00)00008-5
Identification Number: doi:10.1016/S0927-796X(00)00008-5
Funders: The authors thank the Deutsche Forschungsgemeinschaft, Bonn (Germany), for financial support. R.R. acknowledges the support of Fonds der Chemischen Industrie, Frankfurt (Germany), of Bayer AG, Leverkusen and the KSB foundation, Stuttgart., Y.-L.L. acknowledges the Humboldt Foundation for granting a research fellowship, and E.L. acknowledges the European Union for granting a Marie Curie fellowship.
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