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Mechanical behaviour and environmental stability of continuous fibre-reinforced glass-ceramic matrix composites
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UNSPECIFIED (1996) Mechanical behaviour and environmental stability of continuous fibre-reinforced glass-ceramic matrix composites. GLASTECHNISCHE BERICHTE-GLASS SCIENCE AND TECHNOLOGY, 69 (2). pp. 34-43. ISSN 0946-7475
Full text not available from this repository.Abstract
The mechanical behaviour of three continuous silicon carbide fibre-reinforced glass-ceramic matrix composites has been investigated at room and high temperatures. Commercially available composites with magnesium aluminosilicate, calcium aluminosilicate and barium magnesium aluminosilicate glass-ceramic matrices were considered. The materials were tested in the as-received and aged (heat-treated in an oxidizing environment) condition. Four-point bend static tests and flexural creep, fatigue and creep-fatigue tests were carried out as well as a small quantity of tensile tests of aged composites. The experimental results have highlighted the importance of the carbon-rich layer at the fibre/matrix interface for obtaining ''graceful'' failures. At temperatures of 700 to 800 degrees C oxidative degradation of the interface results in significant strength reduction and a transition to brittle fracture mode. By rapid heat treatment of the materials at 1100 degrees C for 1 h it is possible to seal the fibre ends by forming a silica ''plug'' which prevents oxygen ingress, retaining the carbon-rich interphase and composite behaviour. The results of the creep and creep-fatigue tests indicate low-cycle loading has a strong influence on the life of components at high temperatures.
| Item Type: | Journal Article |
|---|---|
| Subjects: | T Technology > TP Chemical technology |
| Journal or Publication Title: | GLASTECHNISCHE BERICHTE-GLASS SCIENCE AND TECHNOLOGY |
| Publisher: | DEUTSCHEN GLASTECHNISCHEN GES |
| ISSN: | 0946-7475 |
| Date: | February 1996 |
| Volume: | 69 |
| Number: | 2 |
| Number of Pages: | 10 |
| Page Range: | pp. 34-43 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/18982 |
Data sourced from Thomson Reuters' Web of Knowledge
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