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Diffusion-Segregation Equation for Simulation in Heterostructures

Published online by Cambridge University Press:  21 February 2011

R. Gafiteanu ,
H.-M. You ,
U. Göesele  and
T.Y. Tan
R. Gafiteanu
Affiliation:
Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708-0300
H.-M. You
Affiliation:
Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708-0300
U. Göesele
Affiliation:
Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708-0300
T.Y. Tan
Affiliation:
Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708-0300
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Abstract

Diffusion of impurity atoms or point defect species occurs simultaneously with segregation in materials that are inhomogeneous or consisting of heterostructures. Based on thermodynamic principles, a general diffusion-segregation equation (DSE) simultaneously describing the species’ diffusion and segregation behavior has been derived. The DSE treats the diffusion-segregation problems on the same fundamental level as the diffusion problems are treated by Fick’s Laws. A critical comparison of modeling diffusion-segregation phenomena using the DSE vs. previous formulations is given. The wide range of applications of the DSE is demonstrated by several examples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 318: Symposium Ca – Interface Control of Electrical, Chemical, and Mechanical Properties , 1993 , 31
Copyright
Copyright © Materials Research Society 1994

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References

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