Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals
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.
A. Agüero, J.M. Albella, M.P. Hierro, J. Phillibert and F.J. Pérez Trujillo
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