In situ SAXS characterization of demixing kinetics in a commercial Al-Li alloy

In situ Small Angle X-ray Scattering characterization of morphological evol ution during ageing of a commercial Al-Li alloy is studied at various agein g temperatures. Late stages of the phase separation phenomenon are studied. The existence of scaling length describing the overall demixing kinetics i s evidenced. The minority phase average sizes are shown to follow a power l aw time dependence, which deviates from the usual Lifshitz-Slyozov trend. F inally dynamical scaling behaviour has been observed for samples during the Ostwald ripening stage.