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Elastic Properties of Steps at Interphase Boundaries

Published online by Cambridge University Press:  25 February 2011

G. J. Shiflet
G. J. Shiflet*
Affiliation:
Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22903
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Abstract

Stresses are introduced in crystals at interphase boundaries where steps improve the registry of atoms. A model and mathematical analysis based on an approach previously taken by van der Merwe and Shiflet1–4 of the problem incorporating a coherent step are presented. Computed distributions of stresses, strains, dilatation and energy density in the form of contours and nets are given for a coherent monatomic step. It is concluded that the maximum stresses are quite large and the fields decay fairly rapidly with distance from the steps, the gradient of dilatation around steps will significantly affect diffusion kinetics of impurities and the strain energy seems too low to significantly enhance chemical processes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 53
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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