About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Research in Reduced Gravity
|
Presentation Title |
Effect of Convection on Co-Si Solidification Pathway: Insights from Advanced Photon Source Synchrotron XRD |
Author(s) |
Evan B. Baker, Sangho Jeon, Douglas M. Matson |
On-Site Speaker (Planned) |
Evan B. Baker |
Abstract Scope |
Co-Si is a complex alloy system with 5 intermetallic compounds and 3 eutectics. Recent studies report interesting phenomena during solidification of CoSi-CoSi2 eutectic compositions, including competitive nucleation, reversed phase solidification order at high undercooling, and morphological changes in microstructure. Co-Si is also slated for ISS EML experiments in Batch 3. Given the considerable complexity in Co-Si solidification, phase information as a function of experimental conditions is essential for supporting those future space experiments.
In particular, convection in the molten sample is a critical parameter that is often ignored when comparing terrestrial and space experiments. We use in situ synchrotron XRD to investigate the effect of convection on solidification of eutectic CoSi-CoSi2. A modernized glass fluxing apparatus is used to undercool the sample while controlling the degree of stirring. In this way, the effect of convection on solidification pathway is studied and serves as a benchmark for ISS EML runs. |
Proceedings Inclusion? |
Planned: Publication Outside of TMS |