About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Synchrotron X-Ray Nanotomography Uncovers Microstructure
of a Three-Phase Eutectic Solidified in Microgravity
|
Author(s) |
Soumyadeep Dasgupta, Xianghui Xiao, Melis Serefoglu, Ulrike Hecht, Ashwin Shahani |
On-Site Speaker (Planned) |
Soumyadeep Dasgupta |
Abstract Scope |
Microstructure selection of two-phase eutectics is reasonably well understood, but the same cannot be said about three-phase eutectics. Our study aims to advance fundamental understanding of pattern formation in the Al-Ag-Cu system during invariant eutectic solidification. Using synchroton x-ray nanotomography with high spatial resolution (~50 nm), we investigate in 3D the microstructural arrangement of α(Al), Ag₂Al, and Al₂Cu eutectic phases following directional solidification (DS) under diffusive conditions in a microgravity environment aboard the International Space Station. With the wealth of 3D data, we quantify various attributes of the three-phase pattern during a velocity jump in DS: the phase fractions, eutectic length scales, phase connectivities, and interfacial shapes. Our research offers new insights into the selection of eutectic morphology and topology under DS, with implications to a wide array of multi-phase systems. |
Proceedings Inclusion? |
Undecided |