About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Impact of glass chemistry and ceramic architecture on oxidation resistance of UHTC composites |
| Author(s) |
Vaibhav Verma, Catherine Ott, Ian McCue, Jeffrey Chen |
| On-Site Speaker (Planned) |
Ian McCue |
| Abstract Scope |
Ultra-high temperature ceramics (UHTCs) are promising materials for hypersonic and atmospheric re-entry vehicles but suffer from severe oxidation and erosion under extreme aerothermal environments. This work investigates an oxidation protection strategy based on glass-ceramics containing TaC composites, where both glass chemistry and microstructural architecture are tailored to enhance high-temperature stability. Nanometer-sized TaC powders were combined with 40–80 vol.% alumino-borosilicate glass-ceramics of varying composition (84–95 vol.% SiO₂, 5 vol.% B₂O₃, 0–10 vol.% Al₂O₃, 0–1 vol.% Na₂O), synthesized via sol-gel processing. This led to a composite architecture comprising of engineered glass phases residing in porous TaC scaffolds. Glass composition was varied to regulate high-temperature viscosity, while TaC loading was adjusted to modify UHTC phase connectivity and capillary confinement of the glass. Oxidation behavior (1200–1600 °C) and hardness were evaluated to establish processing–microstructure–property relationships and develop design guidelines for oxidation-resistant, mechanically robust UHTC composites. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, High-Temperature Materials, Environmental Effects |