Abstract
The most effective way to obtain liquid diffusion measurements is the shear cell technique. In this method, a diffusion couple is only joined at a target temperature, to avoid diffusion during heating and cooling and to avoid solidification effects. Numerical simulations confirm that the misalignment of a diffusion couple hinders precise diffusion experiments. Hence, the sample should be observed during the shear cell experiments to confirm the correct alignment. A direct X-ray observation system was thus specifically developed and the impurity diffusion of Au in liquid Ag was successfully measured using this apparatus.
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