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Direct Activity Measurements in Liquid Ag-Au=Ge System and its Solution Model Development by Computational Techniques

Published online by Cambridge University Press:  01 January 1992

Qiling Yu  and
Stanley M. Howard
Qiling Yu
Affiliation:
The University of Arizona, Department of Materials Science and Engineering, Arizona Materials Laboratory, 4715 E. Ft. Lowell Rd., Tucson, AZ 85712
Stanley M. Howard
Affiliation:
South Dakota School of Mines and Technology, Department of Metallurgical Engineering, 501 E. St. Joseph St., Rapid City, SD 57701.
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Abstract

Ag activities in the Ag-Au-Ge solution were determined by the mass spectrometric analysis of effusates from a unique valved Knudsen cell at 1416 K. A mathematical model was established for Ag activity coefficient as a function of alloy composition. Activities of Au and Ge were calculated by numerical ternary Gibbs-Duhem integration on a spreadsheet. The data obtained from this investigation show that the activities on all three binary systems occurring in the ternary system are in good agreement with accepted literature values. The behavior of all pseudo binaries was found to be consistent with Darken's quadratic formalism. Darken surface of Ag is shown.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 291: Symposium O – Materials Theory and Modeling , 1992 , 425
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

1. Howard, S. M., Met. Trans. B, 20B, 845–52 (1989).Google Scholar
2. Margrave, J. L., The Characterization of High Temperature Vapors, (John Wiley and Sons, New York, 1967), p. 225.Google Scholar
3. Hultgren, R., Desai, P. D., Hawkins, D. T., Gleiser, M., Kelley, K. K., and Wagman, D.: Selected Values of the Thermodynamic Properties of Elements, (ASM, Metals Park, OH, 1973), pp. 21, 51, and 207.Google Scholar
4. Darken, L. S., Trans. Met. Soc. AIME, 239, 80–9 (1967).Google Scholar
5. Darken, L. S., Trans. Met. Soc. AIME, 239, 90–6 (1967).Google Scholar
6. Darken, L. S., J.Amer. Chem. Soc. 72, 2909–14 (1950).Google Scholar
7. Chou, K. C., Scientia Sinica 21, 73–86 (1978).Google Scholar
8. Yu, Q., PhD thesis. South Dakota School of Mines and Technology, 1991.Google Scholar
9. Hultgren, R., Desai, P. D., Hawkins, D. T., Gleiser, M., and Kelley, K. K.: Selected Values of the Thermodynamic Properties of Binary Alloys, (ASM, Metals Park, OH, 1973), pp. 30 and 60.Google Scholar
10. Martin-Garin, L., Chatillon, C. and Allibert, M., J. Less - Common Metals 63, 9–23 (1979).Google Scholar
11. Batalin, G. I., Beloborodova, E. A., and Stukalo, V. A., Russ. J. Phys. Chem. 45, 1533 (1971) [Zh. Fig. Khim. 45, 2697 (1971)].Google Scholar
12. Predel, B. and Bankstahl, H., J. Less - Common Metals 43, 191-203 (1975).Google Scholar
13. Eremenko, V. N., Lukashenko, G. M., and Pritula, V. L., IZV. Akad. Nauk SSSR. Neorg. Mater. 3, 1584–90 (1967).Google Scholar
14. Wagner, C. and Engelhardt, G.. Z. Physik. Chem. A159, 241–67 (1932).Google Scholar
15. Oriani, R. A., Acta Met. 4, 15–25 (1956).Google Scholar
16. Predel, B. and Stein, D. W., Z. Naturforsch 26A (4), 722–34 (1971).Google Scholar
17. Hager, J. P., Howard, S. M., and Jones, J. H., Met. Trans. 4, 2383–8 (1973).Google Scholar