Viscosity and relaxation processes of the liquid become amorphous Al-Ni-REM alloys

TL;DR

This study investigates how viscosity and relaxation processes in certain liquid alloys evolve over time and temperature, revealing non-monotonic relaxation behaviors after phase transitions in Al-based alloys with rare-earth metals.

Contribution

It introduces a detailed analysis of viscosity and relaxation in Al-Ni-REM alloys, highlighting non-monotonic relaxation phenomena post phase transition, and proposes a mechanism for these processes.

Findings

Non-monotonic relaxation observed in Al-Y, Al-Ni-REM melts.

Relaxation processes linked to destruction of nonequilibrium states.

Mechanism of relaxation in non-equilibrium melts proposed.

Abstract

The temperature and time dependencies of viscosity of the liquid alloys, Al87Ni8Y5, Al86Ni8La6, Al86Ni8Ce6, and the binary Al-Ni and Al-Y melts with Al concentration over 90 at.% have been studied. Non-monotonic relaxation processes caused by destruction of nonequilibrium state inherited from the basic-heterogeneous alloy have been found to take place in Al-Y, Al-Ni-REM melts after the phase solid-liquid transition. The mechanism of nonmonotonic relaxation in non-equilibrium melts has been suggested.