Ablation Properties of C Fibers and SiC Fibers Reinforced Glass Ceramic Matrix Composites upon
1406
Oxyacetylene Torch Exposure
5. Conclusions
The carbon-reinforced glass ceramic matrix composite
exhibits a poorer ablation resistance under oxyacetylene
torch compared to the SiC reinforced one. This superior
ablation resistance of SiC glass ceramic matrix has been
evidenced for either of torch exposure tests (simple and
sequential) where the difference between both materials
is even enhanced. This superior ablation resistance of
glass ceramic matrix/SiC composite results from the
formation of an SiO2 liquid film whose melting is endo-
thermic at temperature above 1600 K, hence reducing the
net heat flow received by the in-situ SiO2 coated com-
posite.
6. Acknowledgements
The authors gratefully acknowledged Christelle Roudault
(LACCO, UMR CNRS 6503) for her help in the TGA
experiments. Thanks to Damien Marchand for technical
support.
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