Effect of magnetic field on binodal temperature in immiscible alloys

The variation of the binodal temperatures for the different immiscible alloys, CdGa and BiGa, was determined through the dynamic viscosity measurements of melts under various external magnetic field conditions. The binodal temperature change was controlled by an energy barrier during solidification. An energy barrier equation is proposed to quantitatively calculate the activation energy during liquid phase separation process for the immiscible alloys. The relationship between the energy barrier and the magnetic field intensity has been established. The magnetic field not only causes an increase of melt viscosity for the immiscible alloys but also makes the melts becoming much stronger. The binodal temperature of the immiscible alloy obviously shifts to higher temperature as the magnetic field intensity increases. An anomaly that the viscosity of immiscible alloys decreases with decreasing temperature is uncovered. (C) 2013 AIP Publishing LLC.