|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Solidification Fundamentals
||Real-time Study on Microstructure Evolution of a Three-phased Eutectic System in Quasi-2D Samples
||Samira Mohagheghi, Melis Serefoglu
|On-Site Speaker (Planned)
For three-phased eutectic systems with isotropic interfacial energies, the stable periodic microstructure obtained upon controlled solidification conditions is found to be ABAC-type, where each letter stands for one phase constituting the eutectic system. In this work, we performed directional solidification (DS) and rotating directional solidification (RDS) experiments using In-Bi-Sn eutectic system. These setups are mounted on special optical microscopy system, which enables observation of solidification front from top and bottom simultaneously and hence facilitates characterization of complex 3D mechanisms of spacing adjustment. We map the morphological stability diagram for the ABAC pattern in quasi-2D samples, characterize the instabilities and explain how system can rearrange itself to recover the ABAC pattern after these instabilities. Additionally, we demonstrate how the existence of anisotropy in crystal/crystal interfacial energies affects the overall microstructure.
||Planned: Supplemental Proceedings volume