Séminaire IM2NP - Ashwin J. Shahani - Mercredi 28 janvier à 14h

Invitation : Guillaume Reinhart (Département MATER, Equipe MCA).

Diffusion : IM2NP, CINaM, Irphe, Madirel, LP3, PIIM (via T. Angot), CPT (T. Martin), Fédération de Chimie, CP2M

SEMINAIRE Mercredi 28 janvier 2026 à 14h00

Salle des séminaires de l'Im2np, campus de Saint-Jérôme, 1er étage Bâtiment Poincaré

Ashwin J. Shahani

Associate Professor, Materials Science & Engineering, University of Michigan

Capturing Solidification and Melting of Irregular Eutectics in Real-Time at the Nanoscale

The ability to directly observe the evolution of microstructure represents a milestone in non-destructive characterization. Synchrotron-based x-ray microtomography has provided valuable information on the solidification of large-scale features (such as dendrites). Yet smaller-scale features (such as eutectic lamellae) have remained out of reach, until now.  Here, we showcase the new capabilities in full-field x ray nano-imaging via transmission x-ray microscopy. This technique enables us to obtain unprecedented insights on the evolution of irregular eutectics during solidification, melting, and under external perturbations.  Our efforts are made possible by a new, two-zone furnace that permits real-time studies of directional solidification. As a result, we can correlate the morphology of the solid-liquid interfaces with the detailed 3D shapes of the eutectic solids frozen behind the growth front. We discuss the broader impacts of these findings on solidification science and outline some opportunities for future investigations using our new experimental platform.