Solute activity change model of binary liquid alloys in electrical field

The activity coefficient of Al in molten Cu decreases with the increasing of electric current which is applied to the liquid alloy of Cu-0.2%Al. To further investigate the mechanism, the quenching experiment of the liquid Al-Cu alloy was conducted. The results show that there is a remarkable change in structure, in which the solute congregates along the direction of the current especially for DC current. The activity coefficient change mechanism of Al in molten Cu-0.2%Al alloy treated by electrical field was discussed. On the basis of this result, a model of the change in solute activity in the liquid alloy treated by electrical field was proposed.