Title

Simultaneous Tracer Diffusion And Interdiffusion In A Sandwich-Type Configuration To Provide The Composition Dependence Of The Tracer Diffusion Coefficients

Keywords

diffusion couple; interdiffusion; self diffusion

Abstract

In this paper, a new formalism of a combined tracer and interdiffusion experiment for a binary interdiffusion couple is developed. The analysis requires an interdiffusion couple that initially contains a thin layer of tracers of one or both of the constituent elements at the original interface of the couple (sandwich interdiffusion experiment). This type of interdiffusion experiment was first performed in 1958 by J.R. Manning. The theoretical analysis presented in this paper is based on a newly developed phenomenological theory of isotopic interdiffusion combined with the Boltzmann-Matano formalism. This new analysis now provides the means to obtain the composition dependent interdiffusion coefficient and tracer diffusion coefficients simultaneously from analysis of the interdiffusion and tracer profiles in a single sandwich interdiffusion experiment. The new analysis is successfully applied to the results of Mannings original sandwich interdiffusion experiment in the Ag-Cd system (six couples in total) and is validated with an independent determination of the Ag and Cd tracer diffusion coefficients by Schoen using the conventional thin film technique. Suggestions for further development of the sandwich interdiffusion experiment and analysis to the case of multicomponent alloys are provided.

Publication Date

11-25-2014

Publication Title

Philosophical Magazine

Volume

94

Issue

31

Number of Pages

3560-3573

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/14786435.2014.965234

Socpus ID

84908208355 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84908208355

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