CRYSTALLIZATION OF SILVER-GERMANIUM ALLOYS UNDER MICROGRAVITY .1. EUTECTIC CRYSTALLIZATION IN HYPOEUTECTIC ALLOY

The results of a study on eutectic crystallisation in the hypoeutectic alloy under different convection conditions are presented. Buoyancy d riven convection was suppressed by processing the samples under microg ravity conditions. The effect of convection level on the eutectic crys tallisation is shown to be significant: In the absence of convection, the non-equilibrium level of the process is enhanced. The characterist ic dependence of the particle size on the distance from the surface of a sample, observed on the minor phase of the eutectic, is discussed.