Numerical Determination of Intrinsic Diffusion in Fe-Cr-Al Systems

Bartłomiej Wierzba; Olivier Politano; Sébastien Chevalier; Marek Danielewski

doi:10.4028/www.scientific.net/DDF.297-301.948

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 297-301Numerical Determination of Intrinsic Diffusion in...

Numerical Determination of Intrinsic Diffusion in Fe-Cr-Al Systems

Abstract:

The intrinsic diffusion coefficients in diffusion aluminide coatings based on Fe-30Cr were determined at 1000oC. The diffusion fluxes were given by the Nernst Planck formulae and the Darken method for multicomponent systems was applied. This paper summarizes some numerical results to determine the composition dependent diffusivities in Fe-Cr-Al systems. The method presented in this study to obtain average intrinsic diffusion coefficients is as an alternative to the Dayananda method. Our method based on empirical parameters allowed us to predict the concentration profile during the interdiffusion process.

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Defect and Diffusion Forum (Volumes 297-301)

Pages:

948-953

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.297-301.948

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Online since:

April 2010

Authors:

Bartłomiej Wierzba, Olivier Politano, Sébastien Chevalier, Marek Danielewski

Keywords:

Darken Method, Diffusion Coating, Diffusion Coefficient, Fe-Al System, Intermetallic, Intrinsic Diffusivities

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