Article ID Journal Published Year Pages File Type
1617700 Journal of Alloys and Compounds 2011 4 Pages PDF
Abstract

The technique of solution calorimetry with liquid Sn has been used for the determination of enthalpy of formation of intermetallic compounds from the Au–Sn system. The intermetallic phases were prepared and homogenized in a glow-box operated in high purity argon. They were analyzed by an X-ray diffraction method before the calorimetric investigations to confirm their crystallographic structure. The obtained experimental values of enthalpy of formation were −5.8 ± 0.3 and −1.3 ± 0.4 kJ/mole of atoms for ζ′-Au5Sn, and ζ-Au5Sn of the composition Au89Sn11, respectively. Using the DTA technique the transition temperatures were measured for the following phases: η-AuSn4, ɛ-AuSn2, δ-AuSn, ζ′-Au5Sn and ζ-Au5Sn (Au89Sn11). It was found that the obtained data in the study agreed very well with the results previously presented in literature, except for the ζ-Au5Sn (Au89Sn11) intermetallic phase, for which a difference of about 50° was observed for the liquidus temperature.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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