Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals

Bartłomiej Wierzba; Sébastien Chevalier; Olivier Politano; Marek Danielewski

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

Paper Titles

Diffusion of a Corroding Electrolyte through Defective Electroplated Ceria Based Coatings
p.235

Long Term Diffusion Studies in Fe Aluminide Coatings Deposited by Slurry Application on Ferritic Steel
p.243

Scanning Kelvin Probe Study on the Stability of the Steel/Coating Interfaces Contaminated by Soluble Salts
p.253

Diffusion Aluminide Coatings Using Spherical Micro-Sized Aluminium Particles
p.261

Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals
p.269

Implications of Diffusion on the Composition and Microstructures of Platinum Modified Aluminide Coatings on CMSX-4 Single Crystal Superalloy
p.277

Post-Discharge Nitriding: Mathematical Modeling and Numerical Simulation of the Layer Growth
p.285

Study of the Role of Small Additions of Zr in the CVD- FBR Aluminization Process
p.293

Magnetic Coupling in La_0.7Ca_0.3MnO₃/YBa₂Cu₃O₇/La_0.7Ca_0.3MnO₃ Trilayers
p.303

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Numerical Determination of Intrinsic Diffusion Coefficient of Aluminide Coatings on Metals

Abstract:

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.