Enthalpies of mixing of liquid Ag-Ga, Au-Ga and Ag-Au-Ga alloys

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• 作者：Dominika Jendrzejczyk-Handzlik ^{djendrze@agh.edu.pl}
• 关键词：Calorimetry ; Au-Ga alloys ; Ag-Au-Ga alloys ; Thermochemistry ; Heat of mixing
• 刊名：The Journal of Chemical Thermodynamics
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：107
• 期：Complete
• 页码：114-125
• 全文大小：2812 K
• 卷排序：107

文摘

A literature overview of Ag-Au-Ga system shows that the information about the liquid phase of this system does not exist. Therefore, using MHTC 96 Setaram high temperature drop calorimeter, partial and integral enthalpies of mixing of liquid alloys were determined at first in the binary systems Ag-Ga, Au-Ga and finally in ternary Ag-Au-Ga system. Next, the ternary alloys were investigated along two sections at two temperatures: 1223 K and 1323 K. Experimental results were used to find ternary interaction parameters by applying the Redlich–Kister–Muggianu model for substitutional solutions, and consequently a full set of parameters describing the concentration dependence of the enthalpy of mixing was derived. The experimental results indicate that the heat of mixing in this system is temperature independent, at least in the measured temperature range.