Thermodynamics and phase equilibria involving nano phases in the Cu-Ag system

Hajra, J. P. and Acharya, S. (2004) Thermodynamics and phase equilibria involving nano phases in the Cu-Ag system. Journal of Nanoscience and Nanotechnology, 4 7: 899-906. doi:10.1166/jnn.2004.088

Author Hajra, J. P.
Acharya, S.
Title Thermodynamics and phase equilibria involving nano phases in the Cu-Ag system
Journal name Journal of Nanoscience and Nanotechnology   Check publisher's open access policy
ISSN 1550-7033
Publication date 2004-09
Sub-type Article (original research)
DOI 10.1166/jnn.2004.088
Volume 4
Issue 7
Start page 899
End page 906
Total pages 8
Place of publication Stevenson Ranch, CA, U.S.A.
Publisher American Scientific Publishers
Language eng
Subject 0912 Materials Engineering
1007 Nanotechnology
Abstract The surface tensions of the Cu-Ag system have been evaluated using Butler's equations. Since the evaluation is dependent on the thermodynamic properties of the surface phases, they are calculated based on the first and second order differentials of the surface tension at infinite dilution. The present study establishes significant differences in the properties between the surface phase and bulk phases of the system. The study of the adsorption behaviour finds silver to be surface active relative to copper, which results in the preferential adsorption of silver in the alloys. Furthermore, in view of the differences in terms of fundamental thermodynamic properties between the two phases coupled with the volume-to-radius ratio as depicted by the Thomson-Freundlich concept, the nano phases of the system exhibit a pronounced increase in the adsorption behaviour relative to that of the planar interface of the system. As expected based on the above combined effect of the surface properties, present research shows a considerable decrease in the melting points of the metals, solid-solid, solid-liquid transition and eutectic temperature with a consequent increase in the solubilities of the terminal phases of the system.
Keyword Cu-Ag system
Phase equilibria
Q-Index Code C1
Additional Notes Published under "Communications"

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Chemical Engineering Publications
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