| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Phase Diagrams Applied to Materials Design and Processing: An FMD/SMD Symposium Honoring Rainer Schmid-Fetzer
|
| Presentation Title |
Miscibility gaps in multicomponent systems |
| Author(s) |
Sinn-wen Chen, Yung-Chun Tsai, Yung-Jen Chuang, Hsin-Chieh Huang |
| On-Site Speaker (Planned) |
Sinn-wen Chen |
| Abstract Scope |
Two liquid phases form when the alloys are within a miscibility gap, with the compositions of these phases varying at different temperatures. Nucleation, diffusion, and coarsening may occur during solidification. Interesting as-cast microstructures are observed. The microstructural evolution of alloys solidified through the liquid miscibility gaps is examined. The alloys examined include those in the Ag-Cu-Se-Te and Sn-Bi-Cu-Te quaternary systems, as well as their constituent binary and ternary subsystems with miscibility gaps. Besides the interesting microstructures, possible features related to miscibility gaps in multicomponent systems are also discussed. Since there are many miscibility gaps with wide compositional ranges in the Ag-Cu-Se-Te system, the possibility of the intersection of two liquid miscibility gaps resulting in the coexistence of a three-liquid phase tie-triangle is discussed. The important spinodal curves are also examined. When there is a three-liquid phase region, the mathematical relationships of the Gibbs free energy and its derivatives are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Solidification, Computational Materials Science & Engineering |