Abstract
The effect of small additions of the solutes copper and silver on the diffusivity, solubility, activity, and activity coefficient of oxygen in liquid indium was studied for the temperature range 750°–950°C using solid‐state electrochemical techniques. As these solutes were added to liquid indium in increasing amounts, the oxygen diffusivity was observed to first increase abruptly and then more gradually. A solubility‐diffusivity correlation proved to be valid for all the indium systems studied. The thermodynamics of the In‐Cu and In‐Ag liquid binary systems were studied up to 10 atomic percent and were found to follow regular solution behavior in that composition range.
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