Interface oxidation and stress-rupture of Nicalon{trademark}/SiC CFCCs at intermediate temperatures
- Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.
The effect of oxidation of the carbonaceous fiber coating on the intermediate temperature stress-rupture behavior of a Nicalon{trademark}/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 Nicalon{trademark}/C/SiC exhibits time-dependent loss of strength.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 392825
- Report Number(s):
- CONF-9609265-1; ON: DE97000469; TRN: AHC29622%%61
- Resource Relation:
- Conference: 1. international conference on ceramic and metal matrix composites (CMMC-1), San Sebastian (Spain), 9 Sep 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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