Thermodynamic Properties of Liquid Silver-Tin Alloys

Abstract

Thermodynamic properties in liquid silver-tin alloys have been determined for NSn=0.27∼0.80, over the temperature range of 636∼983 K, by the following E.M.F. method:(This article is not displayable. Please see full text pdf.) Activities of tin show both positive and negative deviations from Raoult’s law, and aSn values agree well with the data measured by Chowdhury et al. but differ from those of Laurie et al. and the others. Activities of silver exhibit negative deviations from Raoult’s law over the whole concentration range.It was observed that the anomalous behaviors in Δ\barHSn and Δ\barSSn at approximately NSn=0.35 are affected by the phase diagram of this system, suggesting that these strongly concentration dependent anomalies are related to the existence of ζ, ε compound clusters in the melt.It can be clearly seen that the anomalous fluctuations in the values of Δ\barHSn and Δ\barSSn at approximately NSn=0.65∼0.70, and possibly also at NSn=0.55 in the experimental result of Laurie et al. are difficult to rationalize.