Paper Title:
Formation Enthalpy, Free-Energy and Activity Coefficients of Sn-Pb Eutectic Solders
  Abstract

Based on Miedema’s model, the enthalpy of formation, excess free-energy and partial molar excess free-energy of Sn-Pb binary alloy solders were calculated. The model of the activity coefficient for each component in the solders was established. The diagrams of enthalpy of formation, free energy versus composition and activity versus composition and temperature as well as activity coefficients as a function of composition and/or temperature were drawn. And then the relationship between the activity coefficients of elements Sn/Pb in the solders and temperature was obtained. The approaches to reduction in the volatilization of lead at high temperature were proposed from the point of views that the lead pollution to environment results from its chemical activity in the solder alloys.

  Info
Periodical
Materials Science Forum (Volumes 610-613)
Main Theme
Edited by
Zhongwei Gu, Yafang Han, Fusheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou
Pages
531-536
DOI
10.4028/www.scientific.net/MSF.610-613.531
Citation
G. S. Gan, F. Chen, R. C. Zeng, Y. F. Du, C. H. Du, "Formation Enthalpy, Free-Energy and Activity Coefficients of Sn-Pb Eutectic Solders ", Materials Science Forum, Vols. 610-613, pp. 531-536, 2009
Online since
January 2009
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$32.00
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