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The approach developed in this paper is based on water experiments, considered as demonstrators of phenomena present during Silicon directional solidification.
We focus mainly on solute segregation. In fact, this paper presents an original experiment where we introduce electrochemical techniques in order to quantify and understand the mass transfer phenomena.
Measurements are performed in a demonstrator containing a transparent electrolyte. Acoustic waves are used to generate a steady flow. The acoustic beam is reflected on the upper wall, which contain the electrodes. This wall represents the metal solidification front. The electrodes enable us to characterize the mass transfer by diffusion through the boundary layer. Some first results are presented in this paper. In fact, due to the implemented experimental protocol, we are able to characterize the thickness of the boundary layer. Further measurements will be carried out to have a better vision and understanding of the physical phenomena present in this layer.
