| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
|
| Presentation Title |
In Situ Evidence of Dynamic Interactions between Droplets and Dendrites during Rapid Solidification of Immiscible Alloys |
| Author(s) |
Jianrong Gao |
| On-Site Speaker (Planned) |
Jianrong Gao |
| Abstract Scope |
The phase diagram of two metals with positive heat of mixing often show a liquid miscibility gap. When a homogeneous liquid is cooled to the binodal of the miscibility gap, it will be decomposed into two liquids of different chemical compositions. This liquid-liquid decomposition is known as liquid phase separation and has aroused fundamental and technical interest in the past decades. In this talk, I present in situ observations of rapid solidification of phase-separated metallic alloys using a high-speed optical camera. It was observed that droplets of a minority phase have strong and dynamic interactions with dendrites of a primary solid phase rapidly crystallizing from the majority liquid phase leading to acceleration or deceleration of dendrite growth kinetics during solidification. These dynamic interactions can be attributed to temporally and spatially dependent Marangoni convection associated with dissipation of latent heat released during rapid crystal growth in the phase-separated liquid mixture. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Hydrometallurgy, Other |