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On the dilute solutions of gold in Bi-Sn alloys |
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| Authors: | A. K. Jena J. H. Smith M. B. Bever A. K. Jene |
| Affiliation: | 1. Department of Metallurgical Engineering, Indian Institute of Technology, Kanpur, India 2. Applied Research Laboratory, U.S. Steel Corp, Monroeville, Pa 3. Massachusetts Institute of Technology, USA |
| Abstract: | The relative partial gram-atomic enthalpy of gold Δ?HAu at infinite dilution in bismuth, tin, and six Bi-Sn alloys has been measured at 623°K. The composition dependence (dΔ?HAu/dx Au)xAu→0 in bismuth and two Bi-Sn alloys and the temperature coefficient (dΔ?HAu,xAu→0)/dT in three Bi-Sn alloys have also been measured. An analysis of the results based on the quasichemical theory shows that (dΔ?HAu/dx Au)xAu→0) is very sensitive and Δ?HAu,xAu→0 is insensitive to nonzero values of the relative energy of solute-solute bonds; the analysis also shows that a decrease in the coordination number has a small effect on (dΔ?HAu/dx Au)xAu→0 but has an appreciable effect on Δ?HAu,xAu→0 |
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