Multiscale Analysis of Ceramic Matrix Composites under Extreme Temperatures
Abstract
Carbon fiber reinforced Carbon matrix (C/C) composites have been shown to retain excellent thermal and mechanical properties at high temperatures in an inert atmosphere. However, these composites degrade rapidly at temperatures as low as 450 deg C in oxidizing environments due to the conversion of solid carbon to gaseous oxides. An integrated experimental and computational approach was developed and implemented within this project to identify the thermo-chemical degradation of C/C composites. A reaction-diffusion finite element model at multiple length scales was developed to determine degradation modes due to the oxidation of carbon-carbon ceramic matrix composites. Fundamental kinetics and diffusion parameters were determined for carbon fibers and matrix by performing Thermogravimetric analysis of C/C composites in different forms. The dependence of diffusion constants on the reaction state and the mode of degradation was established by employing the reaction-diffusion finite element model at the microscale.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 06, 2023
- Accession Number
- AD1230448
Entities
People
- Pavana Prabhakar
Organizations
- University of Wisconsin–Madison