The pressure effect on the liquid-liquid transition kinetics of metallic glass

Many metallic glasses (MGs) have been reported to undergo a liquid-liquid transition (LLT) on heating in the supercooled liquid regime, which is characterized by an exothermic peak in the calorimetric signal and a structural change within the short- to medium-range order.But the study of LLT in MGs under a combined condition of temperature and pressure is still missing, which is important for our understanding of the LLT mechanism in multi-component liquid systems. For this issue, we propose here to follow the structural evolutions during the LLT in Pd42.5Ni42.5P15 MGs by means of X-ray diffraction (XRD) under different temperature and pressure conditions. This will provide us the fundamental information of LLT under high-pressures and help us to construct the pressure temperature phase diagram for two different metallic liquids.