C E Orji
Articles written in Pramana – Journal of Physics
Volume 72 Issue 6 June 2009 pp 951-967 Research Articles
The mutual diffusion coefficients, activation energy for diffusion, surface concentration and surface tension of the liquid Cd–Ga alloys have been calculated throughout the concentration range using energetics obtained from the theoretical model fits of the experimental thermodynamic data. Our calculations show that Cd–Ga liquid alloys showed immiscibility at a temperature of 723 K between 0.4 and 0.5 atomic fraction of Cd. Within this concentration region and temperature, the mutual diffusion coefficients approached zero values and the activation energy for diffusion reached high peak values of 220 J/mol. It was also observed that within the region of immscibility, the diffusion coefficients do not obey Arrhenius relation over a wide range of temperature.
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