| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Ceramic Matrix Composites
|
| Presentation Title |
Synergistic Effects of Oxidation and Applied Load on SiC/BN/SiC Ceramic Matrix Composite Durability at Intermediate Temperatures |
| Author(s) |
Kaitlin Detwiler, Marcus Dozer, Elizabeth Opila |
| On-Site Speaker (Planned) |
Elizabeth Opila |
| Abstract Scope |
SiC/BN/SiC ceramic matrix composites (CMCs) are currently in service as hot section aeroturbine engine components. Despite their current use, CMC life prediction models that account for combined applied load and oxidation lag in development. This work aims to provide data for validation and improvement of these models. SiC/BN/SiC CMCs were oxidized in dry oxygen and 50% H2O/oxygen at intermediate temperatures between 400 and 800C to establish baseline oxidation behavior in the absence of load. The CMCs were then exposed in similar intermediate temperature oxidizing environments at three different tensile loads: first matrix cracking, increased crack densities, and loads above the proportional limit. Specimens were exposed for times up to 100h in load-hold experiments and then characterized by scanning electron microscopy and energy dispersive spectroscopy, with statistical analysis of observed damage. Synergies between oxidation/applied load were explored. |