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Simulation of Intrinsic Diffusion in Multicomponent Multiphase Systems

Published online by Cambridge University Press:  10 February 2011

M. Hunkel  and
D. Bergner
M. Hunkel
Affiliation:
Institute of Physical Metallurgy, Freiberg University of Mining and Technology, 09599 Freiberg, GERMANY
D. Bergner
Affiliation:
Institute of Physical Metallurgy, Freiberg University of Mining and Technology, 09599 Freiberg, GERMANY
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Abstract

A simulation model for intrinsic diffusion of multicomponent multiphase systems is presented. The model is not restricted onto a certain number of components or phases. For simplicity, Manning's random alloy model with vanishing vacancy wind effect is used. Then the cross terms of the diffusion flux can be neglected. The simulation routine uses equations for the fluxes, the equation of continuity and an equation for the change of the thickness of volume elements due to the vacancy flux. With this model diffusions paths, concentration profiles, fluxes of the components as well as marker positions can be calculated. The shift of interfaces and the growth of new phases can also be determined. The simulation results were compared with experimental data of the Cu-Fe-Ni system. Diffusion was studied in single-phase areas and across interfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 527: Symposium Z – Diffusion Mechanisms in Crystalline Materials , 1998 , 93
Copyright
Copyright © Materials Research Society 1998

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References

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