INTERPHASE PHENOMENA IN SILICON CARBIDE SINGLE FILAMENT COMPOSITES
A heat-treated SiC Nicalon NLP 201 fibre and four single-filament composites were characterised by TEM. Phenomena before and during chemical vapour deposition were investigated. The thermal decomposition of the fibre is explained. The SiC microcrystals in the fibre decompose giving a solid carbonace...
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| Published in | Journal of materials science Vol. 25; no. 9; pp. 3864 - 3874 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
01.09.1990
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| Online Access | Get full text |
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| Summary: | A heat-treated SiC Nicalon NLP 201 fibre and four single-filament composites were characterised by TEM. Phenomena before and during chemical vapour deposition were investigated. The thermal decomposition of the fibre is explained. The SiC microcrystals in the fibre decompose giving a solid carbonaceous porous residue and a gas phase containing mainly silicon. A catalytic reaction explains the reorganisation of carbon when silica is present. Another reaction between silica and carbon, forming SiC, also explains the formation of an SiC interphase when depositing a carbon matrix. The non-stability of the SiC Nicalon fibre explains all of these transformations, major consequence being a decrease in its mechanical properties when used in composites. 17 refs. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 0022-2461 |
| DOI: | 10.1007/BF00582452 |