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Dislocation Core Spreading at Interfaces between Crystalline and Amorphous Solids

Published online by Cambridge University Press:  18 March 2011

Huajian Gao ,
Lin Zhang  and
Shefford P. Baker
Huajian Gao
Affiliation:
Max Plank Institute for Metals Research, Seestr. 92, D-70174 Stuttgart, Germany Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA
Lin Zhang
Affiliation:
Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA
Shefford P. Baker
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
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Abstract

A fundamental question addressed here is concerned with the equilibrium structure of a dislocation core at an interface between a crystalline and an amorphous solid. This is motivated by experimental observations that the contrast of dislocations at an interface between a crystalline film and an amorphous substrate disappears under transmission electron microscopy. We have developed a mathematical moedl to describe the time-dependent behavior of dislocation core spreading as a function of the adhesive strength of the interface. The equilibrium core width and the rate of core spreading are determined in closed form solutions.

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References

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