Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites
The development of microstructural damage in silicon carbide fibre (Nicalon™) reinforced glass matrix composite samples subjected to thermal shock was investigated by using a nondestructive forced resonance technique and fibre push out indentation tests. Thermal shock testing involved quenching samp...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
1998-09-01
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| Series: | Materiales de Construccion |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/469 |
| _version_ | 1818457356172787712 |
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| author | A. R. Boccaccini D. N. Boccaccini D. H. Pearce J. Janczak-Rusch |
| author_facet | A. R. Boccaccini D. N. Boccaccini D. H. Pearce J. Janczak-Rusch |
| author_sort | A. R. Boccaccini |
| collection | DOAJ |
| description | The development of microstructural damage in silicon carbide fibre (Nicalon™) reinforced glass matrix composite samples subjected to thermal shock was investigated by using a nondestructive forced resonance technique and fibre push out indentation tests. Thermal shock testing involved quenching samples in a water bath maintained at room temperature from a high temperature (650ºC). Changes in the Young's modulus and internal friction of the samples with increasing number of shocks were measured accurately by the forced resonance technique. Fibre push-out tests showed no significant changes in the properties of the fibre-matrix interface, indicating that damage in the composite was concentrated mainly in the development of matrix microcracking. It was also shown that the internal friction is a very sensitive parameter by which to detect the onset and development of such microcracking. A simple semi-empirical model is proposed to correlate the internal friction level with the microcracking density in the glass matrix. Finally, the relevance of detecting nondestructively the existence of microcracks in the glass matrix, before any significant interfacial degradation occurs, is emphasized, in conextion with the possibility of inducing a crack healing process by a thermal treatment (annealing), taking advantage of the viscous flow properties of the glass. |
| first_indexed | 2024-12-14T22:41:16Z |
| format | Article |
| id | doaj.art-f61851247b5348efae08563a61b5b1b3 |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-14T22:41:16Z |
| publishDate | 1998-09-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-f61851247b5348efae08563a61b5b1b32022-12-21T22:44:59ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32261998-09-0148251193510.3989/mc.1998.v48.i251.469451Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix compositesA. R. Boccaccini0D. N. Boccaccini1D. H. Pearce2J. Janczak-Rusch3FG Werkstoffechnik, TU IlmenauUTN FR San RafaelIRC in Materials, The University of BirminghamEMPA-ThunThe development of microstructural damage in silicon carbide fibre (Nicalon™) reinforced glass matrix composite samples subjected to thermal shock was investigated by using a nondestructive forced resonance technique and fibre push out indentation tests. Thermal shock testing involved quenching samples in a water bath maintained at room temperature from a high temperature (650ºC). Changes in the Young's modulus and internal friction of the samples with increasing number of shocks were measured accurately by the forced resonance technique. Fibre push-out tests showed no significant changes in the properties of the fibre-matrix interface, indicating that damage in the composite was concentrated mainly in the development of matrix microcracking. It was also shown that the internal friction is a very sensitive parameter by which to detect the onset and development of such microcracking. A simple semi-empirical model is proposed to correlate the internal friction level with the microcracking density in the glass matrix. Finally, the relevance of detecting nondestructively the existence of microcracks in the glass matrix, before any significant interfacial degradation occurs, is emphasized, in conextion with the possibility of inducing a crack healing process by a thermal treatment (annealing), taking advantage of the viscous flow properties of the glass.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/469 |
| spellingShingle | A. R. Boccaccini D. N. Boccaccini D. H. Pearce J. Janczak-Rusch Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites Materiales de Construccion |
| title | Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites |
| title_full | Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites |
| title_fullStr | Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites |
| title_full_unstemmed | Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites |
| title_short | Assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites |
| title_sort | assessment of thermal shock induced damage in silicon carbide fibre reinforced glass matrix composites |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/469 |
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