Relaxation in Al–La Glass-Forming Melt

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

“…The character of the time dependences of viscosity and the relaxation times and also the effect of the decrease of the relaxation time at the increase of the temperature are in good agreement with the data obtained earlier during the investigation of the time dependences of the viscosity of liquid alloys of the Al-(Ni,Co)-Re systems [30,34] and binary alloys Al 91 Ce 9 , Al 90 Sm 10 [25] and Al 91 La 9 [26].…”

“…The increase of temperature leads to a decrease in the duration of the property value relaxation [30]. More recently, similar relaxation processes have been found on the polytherms of the viscosity and density of the binary systems Al-Ce(Sm) [25] and Al-La [26].…”

“…During the investigation of the features of the structural state of melts and interparticle interaction in them, indirect methods are frequently used, which are based on studying temperature and concentration dependences of structure-sensitive properties of a melt such as viscosity, density, electrical resistance, magnetic susceptibility [11,[20][21][22]. The existing data on the investigation of the properties of melts of the binary Al-R [23][24][25][26][27], ternary Al-TM-R [28][29][30] and more complex systems based on them [30][31][32] confirm the conclusion about the micro-heterogeneous structure of the melts. It is also shown that after melting near the liquidus temperature the structure of the melts becomes more complex due to the appearance of the nonequilibrium state [12,[28][29][30].…”

“…Additionally, the conditions of the appearance of such relaxation processes in the liquid AL-TM-R alloys have not been fully studied. The nonequilibrium of a melt is mainly explained by inheritance during the melting of compounds with a strong interatomic interaction, high temperature of melting of these compounds and their gradual destruction [25][26][27]30]. The Al-TM systems satisfy these conditions [36]; however, in the melts of the said systems relaxation processes have not been earlier found.…”