About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments IV
|
| Presentation Title |
Designing Stable Nanoporous UHTCs for High Temperature Aerospace Applications |
| Author(s) |
Catherine Ott, Noah Zheng, Ian McCue |
| On-Site Speaker (Planned) |
Catherine Ott |
| Abstract Scope |
Ultra-high temperature ceramics (UHTCs) have drawn interest for use in hypersonic structures due to their high melting points, excellent thermo-physical properties, and reasonably low densities; however, due to processing limitations, they have primarily been used as monolithic materials or coatings. Here, we are interested in adding additional functionality (e.g., transpiration cooling) by developing a morphologically stable porous UHTC. Previous work (10.48550/arXiv.2412.18657) has quantified the kinetic parameters of the conversion of nanoporous metals to ultra-high-temperature ceramics via gas-phase conversion at low temperature (<1000°C) for powder with a single, nanoscale, feature size. The present work aims to explore the microstructural development during conversion that results in nanocrystalline UHTCs. Additionally, the high-temperature coarsening behavior of the UHTCs TaC and TaN will be evaluated and compared to metallic Ta to assess their feasibility for use in applications where stable, nanoscale feature sizes are desired. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Powder Materials, |