The Influence of Thermodynamic Properties of Alloys on Effective Interdiffusion Coefficients in Ternary Systems

Abstract:

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To prove the validity of Dayananda’s phenomenological model of interdiffusion in ternary systems the effective interdiffusion coefficients for a few diffusion couples in the system Cu-Ni-Fe, annealed at 1000 oC, are calculated on the basis of this model using available tracer diffusion and thermodynamic data. It is found that the calculated values of effective interdiffusion coefficients are in reasonable agreement with experimental values extracted independently from experimental concentration--penetration curves. Using the relationship between effective interdiffusion coefficients, tracer diffusion coefficients and thermodynamic factors, it is shown that thermodynamic properties of alloys play a significant role in interdiffusion processes in the system Cu-Fe-Ni.

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Periodical:

Edited by:

J. Čermák and I. Stloukal

Pages:

141-146

DOI:

10.4028/www.scientific.net/DDF.263.141

Citation:

Ü. Ugaste et al., "The Influence of Thermodynamic Properties of Alloys on Effective Interdiffusion Coefficients in Ternary Systems", Defect and Diffusion Forum, Vol. 263, pp. 141-146, 2007

Online since:

March 2007

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$35.00

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