Microscopic dynamics of high-entropy metallic glass formers

In a recent experiment, we demonstrated that the glass and super-cooled liquid dynamics could be experimentally resolved while heating at a constant rate, thus extending the limitation of temperature due to crystallization and enabling the direct comparison with mechanical and calorimetric characterization. In this proposal, a set of alloys is selected comprising high-entropy and ‘conventional’ metallic glasses of three different compositional families: La20Ce20Y20Ni20Al20, Pd20Pt20Cu20Ni20P20 and Ti16.7Zr16.7Hf16.7Cu16.7Ni16.7Be16.7. The new temperature and time windows accessible by XPCS at ESRF-EBS will allow us to study, for the first time, the high-entropy effect on the microscopic dynamics of glass-forming melts. This will be a crucial experiment to check if there is an actual high entropy effect on the viscosity behavior of metallic melts.