About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Materials Research in Reduced Gravity
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| Presentation Title |
Peritectic Coupled Growth: Insights from Microgravity Experiments and Phase-Field Modeling of Initial Transition Dynamics |
| Author(s) |
Johann Mogeritsch, Tamás Pusztai, Andreas Ludwig, Laszlo Rátkai |
| On-Site Speaker (Planned) |
Laszlo Rátkai |
| Abstract Scope |
Layered peritectic growth structures forming alternating α- and β-lamellae perpendicular or parallel to the sample axis. Growth perpendicular to the axis results in a pattern similar to that observed in eutectic alloys. Still, unlike eutectic systems, both phases in PCG accumulate the same component in the pile-up, and the growth conditions are significantly more restrictive.
In situ investigations using the organic TRIS–NPG model system in microgravity conditions aboard the International Space Station revealed that PCG occurred even during the initial transition phase. This key observation motivated the development of an extended phase-field model for peritectic solidification that explicitly incorporates the initial transition phase.
This model's distinguishing features are its ability to account for a temperature gradient aligned with the sample axis and a slight inclination between the temperature gradient and the sample axis.
We demonstrate how these variations influence the evolution of layered structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, |