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Mission Cycle Life Prediction for C/SiC CompositesThe residual strength and life of C/SiC is dominated by carbon interface and fiber oxidation if thermal and mechanical stresses combine with thermal expansion mismatch in a manner such that seal coat and matrix cracks are open to allow oxygen ingress. Under these circumstances life can be predicted by simple oxidation based models based on reaction controlled kinetics at low temperature and gas phase diffusion controlled kinetics at high temperature. Key life governing variables in these models include temperature, applied stress, initial strength, oxygen partial pressure and total pressure. In this paper these models are described and extended to mission cycle life prediction.
Document ID
20050205747
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Levine, Stanley R.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2004
Subject Category
Composite Materials
Meeting Information
Meeting: Fifth International Conference on High Temperature Ceramic Matrix Composites (HTCMC-5)
Location: Seattle, WA
Country: United States
Start Date: September 12, 2004
End Date: September 16, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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