Monitoring phase transformations and ligaments morphology in liquid metal dealloying of powders through coupled in situ X-ray diffraction an

Liquid metal dealloying is a novel technique applicable on a wide range of metals for elaborating porous materials with a connected and open porosity at nanoscales. This study aims at manufacturing micro-porous FeNi powders for applications in additive manufacturing and at building a predictive numerical model for dealloying kinetics and morphologies. The role of each phase appearing during the dealloying reaction and their influence on kinetics and ligaments morphology is yet to be investigated, hence in-operando XRD would help to monitor the mechanism responsible and the rate of appearance of these phases. A coupling with X-ray tomography would allow the investigation of dealloying rates and resulting morphology.