Abstract
The effect of oxidation of the carbonaceous fiber coating on the intermediate temperature stress-rupture behavior of a NicalonTM/C/SiC continuous fiber composite was modeled. The model, that was reduced to the analysis of a general ideal bundle composed of classical fibers subjected to constant loading, predicts that the oxidation of the fiber coating triggers a sequence of processes that can lead, under certain conditions, to composite failure. These processes involve loss of stress transfer between the fiber and the matrix, fiber overloading, and fiber failure. The implications of the model predictions are discussed in relation to experimental measurements at 425°C in air that show that NicalonTM/C/SiC exhibits time-dependent loss of strength.
Original language | English |
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Pages (from-to) | 1069-1082 |
Number of pages | 14 |
Journal | Key Engineering Materials |
Volume | 127-131 |
Issue number | Pt 2 |
State | Published - 1997 |
Event | Proceedings of the 1996 1st International Conference on Ceramic and Metal Matrix Composites, CMMC 96. Part 2 (of 2) - San Sebastian, Spain Duration: Sep 9 1996 → Sep 12 1996 |