Paper Title:
Interdiffusion and Thermodynamic Forces in Binary Liquid Alloys
  Abstract

A novel X-ray radiography method is used to measure chemical diffusion in a long-capillary in liquid Al95Ni5 at.-%. Molecular dynamics simulations provide interdiffusion coefficients and thermodynamic factors for the whole composition range in Al-Ni. The data are compared to literature data in Sb-Sn and Ag-Sn. The relation between interdiffusion coefficient and thermodynamic forces is discussed in the context of the Darken equation. In systems with common ordering tendency (Al-Ni, Sb-Sn) the thermodynamic factor is larger than one and enhances interdiffusion. In systems with common demixing tendency (Ag-Sn) the thermodynamic factor is smaller than one and reduces interdiffusion.

  Info
Periodical
Edited by
A. Roósz, V. Mertinger, P. Barkóczy and Cs. Hoó
Pages
481-486
DOI
10.4028/www.scientific.net/MSF.649.481
Citation
A. Griesche, B. Zhang, J. Horbach, A. Meyer, "Interdiffusion and Thermodynamic Forces in Binary Liquid Alloys", Materials Science Forum, Vol. 649, pp. 481-486, 2010
Online since
May 2010
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$32.00
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