| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
H-11: Effect of Zr Addition on Metastable Phase Separation of Cu-Fe Alloy and Microstructure Control |
| Author(s) |
Hojoon Moon, Jungwook Cho |
| On-Site Speaker (Planned) |
Hojoon Moon |
| Abstract Scope |
The liquid-liquid phase separation (LLPS) behavior was investigated in Cu-Fe alloys that consisted of 60 wt % or 80 wt % Cu and balance iron, without or with addition of 1 wt% Zr. Both Zr-free alloys clearly showed LLPS at metastable spinodal temperatures prior to γ-Fe nucleation, whereas Zr-added showed γ-Fe phase evolution without LLPS. Addition of Zr was highly effective to activate γ-Fe nucleation by decreasing the mixing enthalpy and also accelerating heterogeneous nucleation. A combination of thermal instrumental analysis and classical nucleation theory yielded an effective assessment made of LLPS behavior below the liquidus temperature of Cu-Fe alloys. Furthermore, it was possible to control the solidification mechanism of Cu-Fe alloy by zirconium addition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Phase Transformations, Copper / Nickel / Cobalt |