Role of rare-earth metals (R) in the appearance of relaxation processes in AL–Ni–R metal melts

Abstract

Abstract The temperature and time dependences of the viscosity of liquid ternary alloys Al87Ni8Y5, Al86Ni8La6, Al86Ni8Ce6, Al86Ni6Co8, Al86Ni10Co4 and binary melts Al90(Y/Ni/Co)10 have been studied after different temperature-time treatment of the melt. It is shown that long-time relaxations in the Al–TM–R melts occur only after the phase transition ‘crystal-liquid’ due to the melt transition from the non-equilibrium to equilibrium state. The non-equilibrium state of the melt appears due to inheriting non-equilibrium atomic groups during melting; the atomic groups have ordering characteristic of chemical compounds of the Al x R у type present in solid-state alloys.