On the analysis of composition profiles in binary single-phase diffusion couples: Systems with a strong compositional dependence of the interdiffusion coefficient

Tas Kavakbasi, B and Golovin, IS and Paul, A and Divinski, SV (2018) On the analysis of composition profiles in binary single-phase diffusion couples: Systems with a strong compositional dependence of the interdiffusion coefficient. In: 10th International Conference on Diffusion in Materials, DIMAT 2017, 7 - 12 May 2017, Haifa, pp. 23-30.

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Abstract

Diffusion couple technique is an efficient tool for the estimating the chemical diffusion coefficients. Typical experimental uncertainties of the composition profile measurements complicate a correct determination of the interdiffusion coefficients via the standard Boltzmann-Matano, Sauer-Freise or the den Broeder methods, especially for systems with a strong compositional dependence of the interdiffusion coefficient. A new approach for reliable fitting of the experimental profiles with an improved behavior at both ends of the diffusion couple is proposed and tested against the experimental data on chemical diffusion in the system Fe-Ga. An extension of the approach for reliable description of the up-hill diffusion phenomenon in multicomponent systems is presented.

Item Type:	Conference Paper
Publication:	Defect and Diffusion Forum
Publisher:	Trans Tech Publications Ltd
Additional Information:	The copyright for this article belongs to the Trans Tech Publications, Switzerland.
Keywords:	Diffusion in solids; Interdiffusion (solids); Ternary systems, Chemical diffusion coefficients; Compositional dependence; Concentration profiles; Diffusion couple technique; Experimental uncertainty; Inter-diffusion coefficients; Multi-component systems; Up-hill diffusion, Uncertainty analysis
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	22 Aug 2022 08:57
Last Modified:	22 Aug 2022 08:57
URI:	https://eprints.iisc.ac.in/id/eprint/76112

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