| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments III
|
| Presentation Title |
Improving the Oxidation Behavior of UHTCs Through Nanostructuring |
| Author(s) |
Catherine Ott, Ian McCue |
| On-Site Speaker (Planned) |
Catherine Ott |
| Abstract Scope |
Ultra-high temperature ceramics (UHTCs) have garnered significant interest for use in next-generation hypersonic structures due to their high melting points, excellent thermo-physical properties, and reasonably low densities. However, UHTCs suffer from material erosion and oxidation at high temperature, which is a critical design metric for these applications. UHTC and SiC blends have shown improved performance due to the formation of protective SiO2 layer, but these systems fall short in the congruency of the oxide layer, and aeroshearing loss when the SiO2 is molten above ~1700°C. Here, we introduce a nanostructured UHTC and SiO2 composite that exploits capillary forces to retain the protective SiO2 even at high temperatures when it is molten. The present work explores various methods of synthesizing this material, including sol-gel and infiltration of nanoporous UHTCs. Oxidation and mechanical behavior are studied to evaluate the feasibility for use in hypersonic structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Ceramics, Composites |