| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Simulations/Experiments Integration for Next Generation Hypersonic Materials
|
| Presentation Title |
Foundational Molecular Dynamic Models and Experiments of SiC Oxidation for Materials Development in Extreme Environments |
| Author(s) |
Robert Slapikas, Mike Ammendola, Anindya Ghoshal, Luis Bravo, Ryan Mcgowan, Muthuvel Murugan, Patrick Albert, Justin Reiss, Douglas Wolfe |
| On-Site Speaker (Planned) |
Robert Slapikas |
| Abstract Scope |
Thermomechanical properties of ultra-high temperature ceramics (UHTCs) enable materials to resist greater temperatures and pressures. However, oxidation still hinders the development of extreme-environment materials including ceramic matrix composites (CMCs). Currently, SiC is employed in CMCs as a sintering aid and to generate protective oxide layers at operating temperatures up to 1,500 C. In order to better comprehend surface thermomechanical and chemical-mechanical processes, reactive molecular dynamics simulations are utilized to analyze polycrystalline SiC ablation and oxidation rates at the nanoscale. Simulations were performed at temperatures of 26–2,000 C. The findings provide a framework for linking component behavior to material system performance, which is particularly helpful in the absence of experimental data. This study examines how polycrystalline SiC performance is impacted by high temperature oxidation and the ablation of molecules from its surface. With experimental validation through 1,024 hour static oxidation tests performed at temperatures of 1,100 and 1,300 C. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, High-Temperature Materials, Modeling and Simulation |