Simultaneous tracer diffusion and interdiffusion in a sandwich-type configuration to provide the composition dependence of the tracer diffusion coefficients

    Authors

    I. V. Belova; N. S. Kulkarni; Y. H. Sohn;G. E. Murch

    Comments

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    Abbreviated Journal Title

    Philos. Mag.

    Keywords

    diffusion couple; self diffusion; interdiffusion; SILVER-CADMIUM; Materials Science, Multidisciplinary; Mechanics; Metallurgy &; Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter

    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 Manning's 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.

    Journal Title

    Philosophical Magazine

    Volume

    94

    Issue/Number

    31

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    3560

    Last Page

    3573

    WOS Identifier

    WOS:000343283600004

    ISSN

    1478-6435

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