| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Powder and Ceramic Materials Science
|
| Presentation Title |
Structural Integrity of Complex Oxide Scales for Improved Oxidation Resistance of Ultra-high Temperature Ceramics |
| Author(s) |
Ambreen Nisar, Cheng Zhang, Benjamin Boesl, Arvind Agarwal |
| On-Site Speaker (Planned) |
Ambreen Nisar |
| Abstract Scope |
Ultra-high temperature ceramics (UHTCs) such as Hafnium carbide (HfC) and Tantalum carbide (TaC) are potential candidates for hypersonic applications due to their extremely high melting temperature and oxidation resistance. Solid-solution formation in (Hf, Ta)C system has shown to improve the thermo-mechanical performance of these UHTCs. The formation of complex oxide Ta2H6O17 phase during the oxidation of (Hf, Ta)C improves its oxidation resistance by limiting the oxygen diffusion. Hence, it is imperative to study the chemical and structural integrity of the complex Ta2H6O17 oxide. In the present study, Hafnium oxide (HfO2) and Tantalum oxide (T2O5) powders in varying compositions were ball milled and spark plasma sintered (SPS) at 1300 °C to obtain Ta2H6O17 phase. Synthesis of the Ta2H6O17 phase and its effect on the thermal stability and mechanical integrity will be reported in this presentation. |
| Proceedings Inclusion? |
Planned: |