Thermodynamic activities of alloys

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

“…The former is a thermodynamic quantity which is a measure of the minimum Gibbs energy needed to convert Zn atom from its state in the Zn-Cd solution to the pure state in any proposed extraction or refining process while the latter is an important microscopic function which is relevant for the prediction of the local arrangement of atoms in a liquid binary alloy [4,38]. Figures 3 and 4 show the results of the respective computations of a Zn and a 1 at the temperatures of interest.…”

Computer-aided thermodynamics of liquid ternary Fe–Ni–Co alloys by Knudsen cell mass spectrometry

“…As pointed out in [3,4], the determination of the concentration dependence of the molar mixing effects is a non-trivial problem: Traditional evaluation techniques allow only the determination of the ternary molar excess properties Z E (T, x) along concentration lines with constant ratio of the mole fractions of two components. These problems can be solved using the overall best fit technique as suggested in [3].…”

“…As formulas which are based upon the assumption of ternary regular solution disagree often strongly with the experimental results [5], profitable expressions require therefore an essentially ternary interaction term t Z E (x) describing possible ternary mixing effects [3,4]. With the concomitant advantage that no reasoning is necessary any more on best weighting factors of the three binary contributions.…”

“…With the concomitant advantage that no reasoning is necessary any more on best weighting factors of the three binary contributions. All together the simplest form of ternary molar excess functions is [4] …”

“…The aim of the present study is an accurate experimental investigation of the molar excess quantities of liquid ternary Fe-Ni-Co alloys over the entire range of composition by means of computer-aided Knudsen cell mass spectrometry [1,2]. This was possible because the expectation has been verified that employing of an earlier suggested overall best fit technique [3,4] will reduce considerably both the experimental effort and the time spent on evaluation.…”