| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
In-situ Observation of Coupled Growth Morphologies in Organic Peritectics under Pure Diffusion Conditions |
| Author(s) |
Johann Mogeritsch |
| On-Site Speaker (Planned) |
Johann Mogeritsch |
| Abstract Scope |
Isothermally coupled peritectic solidification for a hyper-peritectic alloy under pure diffusive conditions is presented. For this purpose, directional solidification experiments were performed aboard the International Space Station using a model system for peritectic layer solidification patterns. At constant temperature gradient of 3.0 K/mm and for pulling velocities ranging from 0.12 µm/s to 0.09 µm/s, coupled peritectic growth was observed. At lower pulling velocities, contrary to expectations, only a planar solidification front of the pro-peritectic phase was detected. Two effects were noticed, a significant effect of the pro-peritectic interface on the capability of the peritectic phase to nucleate and, in the further course of the experiments, a dynamic change of the coupled peritectic growth microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Other, Other |