About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2026 – A Memorial to Todd Leonhardt
|
| Presentation Title |
Multi-Modal Characterization of the B2 Phase in the Ta-Re Binary System |
| Author(s) |
Bryan Crossman, Junxin Wang, Loic Perriere, Jean-Philippe Couzinié, Maryam Ghazisaeidi, Michael Mills |
| On-Site Speaker (Planned) |
Bryan Crossman |
| Abstract Scope |
New materials with higher operating temperatures are needed for energy and transportation applications. BCC+B2 refractory complex concentrated alloys (RCCAs) are promising candidates due to their melting points and mechanical properties, dependent on the thermal stability of the B2 phase. In prior work, using density functional theory (DFT), we predicted a high-temperature-stable B2 phase in the Ta-Re binary system. We present the first experimental evidence of this phase in a Ta65Re35 alloy. After aging at 1550°C and 1100°C, a nanoscale, cubic, equiatomic TaRe phase forms. Although B2 superlattice reflections were absent in fast Fourier transforms (FFTs) and diffraction patterns (DPs), diffraction simulations revealed they are ~100 times weaker than fundamental reflections, limiting detectability via electron microscopy. Neutron diffraction confirmed the B2 structure of the secondary phase. This work identifies a previously unobserved high-temperature-stable B2 phase in the Ta-Re system, enabling the development of next-generation BCC+B2 RCCAs for extreme environments. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, High-Temperature Materials, Phase Transformations |