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Morphological Evolution of a Fully Faceted Grain Boundary

Published online by Cambridge University Press:  21 March 2011

D.L. Medlin  and
G. Lucadamo
D.L. Medlin
Affiliation:
Thin Film and Interface Science Department Organization 8721 Mail Stop 9161 Sandia National Laboratories Livermore, CA 94551, USA
G. Lucadamo
Affiliation:
Thin Film and Interface Science Department Organization 8721 Mail Stop 9161 Sandia National Laboratories Livermore, CA 94551, USA
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Abstract

We examine the morphological evolution of faceted grain boundaries in gold during annealing. Experiments were performed on <111> oriented gold films composed of two Σ=3 related orientation variants. The boundaries between these variants initially possess a high density of finely spaced (<25 nm) facets on {112} type planes. During annealing a large proportion of these fine-scale corrugations are annihilated, and the facet distribution coarsens significantly. Through in situ transmission electron microscopy (TEM), we directly observe this coarsening process. These results show a more complex behavior than geometric models for facet evolution would suggest and point to the need for an improved understanding of facet-junction properties and the interactions between grain boundary facets and dislocations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 652: Symposium Y – Influences of Interface & Dislocation Behavior on Microstructure Evolution , 2000 , Y3.4
Copyright
Copyright © Materials Research Society 2001

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References

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