THE VISCOSITY OF LIQUID BI-GA ALLOYS

The shear viscosity of Bi-Ga melts in the entire concentration range w as measured using an oscillating-cup viscometer. The viscosity data we ll above the temperature of phase separation can be represented by an empirical equation of the Arrhenius type. The activation energies of v iscous flow are given. In the vicinity of the critical point the visco sity increases as the temperature decreases. This behaviour is analyse d in terms of various models. The critical exponent y is found to be y = 0.032 +/- 003.