Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals

Abstract:

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This paper presents a numerical method to determine the composition dependent diffusivities and to predict the concentration profile during the interdiffusion process. The intrinsic diffusion coefficients in diffusion aluminide coatings (Fe-Al) were determined at 1000oC. The obtained diffusion coefficient for iron in Fe3Al or FeAl is in the range 10-10 to 10-9 cm2.s-1. The aluminum diffusion coefficient varies from 10-11 to 10-7 cm2.s-1 in the same phases.The present approach also permits to model the reactive diffusion in the Fe-Al systems.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 289-292)

Edited by:

A. Agüero, J.M. Albella, M.P. Hierro, J. Phillibert and F.J. Pérez Trujillo

Pages:

269-276

DOI:

10.4028/www.scientific.net/DDF.289-292.269

Citation:

B. Wierzba et al., "Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals", Defect and Diffusion Forum, Vols. 289-292, pp. 269-276, 2009

Online since:

April 2009

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Price:

$35.00

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