| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
The development of new thermodynamic databases for niobium and molybdenum alloys |
| Author(s) |
Liangyan Hao, Weiwei Zhang, Paul Mason |
| On-Site Speaker (Planned) |
Paul Mason |
| Abstract Scope |
In recent years there has been renewed interest in designing new refractory alloys for ultra-high temperature applications, including those based on niobium and molybdenum.
To support such research activities, this talk will describe the development of two new thermodynamic databases for these alloys using the CALPHAD approach. For niobium alloys, TCNB1 contains the elements Nb-Al-C- Cr-Hf-Mo-Si-Ta-Ti-V-W-Zr and for molybdenum alloys, TCMO1 contains Mo-Al-B-C-Cr-Fe-Hf-Mn-Re-Si-Ti-Zr.
Both databases allow for the calculation of phase equilibria and include volume data as well as thermal expansivity, electrical resistivity and thermal conductivity, and surface tension and viscosity of the liquid. Additionally corresponding mobility databases have also been developed to support kinetic calculations.
The presentation will conclude with some example calculations and validation examples. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, High-Temperature Materials, ICME |