Correlation between structural relaxation and high-entropy effect in metallic glasses

Structural relaxation is one of the most fundamental issues in glasses yet to be fully understood. Recently, many interesting results regarding glass structural relaxation have been obtained by X-ray photon correlation spectroscopy (XPCS) measurements on metallic glasses (MGs). As an emerging novel class of MGs, high entropy metallic glasses (HEMGs) have been developed by compositional design with five or more elements of equimolar or near-equimolar ratios. They are named after their core feature of high configurational entropy. HEMGs provide a valuable opportunity to study the configurational entropy and associated local structural effect on structural relaxation in glasses. Here, we propose to study the correlation between high-entropy effect and structure relaxation in HEMGs in comparison with conventional MGs by XPCS (this proposal) at ID10 and high-energy diffraction (another proposal) to deepen our understanding of the high-entropy effect and its impact on glass relaxation.