About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Thermodynamic Analysis of Nb-Si-Ti Alloys Prepared by Molten Salt Electrolysis |
Author(s) |
Lingyue Song, Hui Li, Jinglong Liang |
On-Site Speaker (Planned) |
Lingyue Song |
Abstract Scope |
Nb-Si based alloys with low density and high melting point exhibit excellent high temperature strength and creep resistance. The addition of titanium improves fracture resistance as well as oxidation resistance. The thermodynamic equilibrium conditions for the electrochemical reduction of Nb2O5, TiO2, and SiO2 oxides were analyzed by performing thermodynamic calculations for the preparation of Nb-Si-Ti alloys by molten salt electrolysis in NaCl-CaCl2 molten salts, and the coupled reactions of the electrochemical reduction process were clarified. The results show that the order of oxide electrolytic reduction is Nb2O5, SiO2, and TiO2, in which the Nb2O5 and TiO2 are reduced to monomers one by one from high to low valence. In addition, during the reduction of Nb2O5, SiO2 and TiO2 under the influence of molten salt and O2− undergo a phase transition to form CaSiO3 and CaTiO3, which are reduced sequentially by electrolysis. The final Nb-Si-Ti alloy can be obtained. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electrometallurgy, High-Temperature Materials, |