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The Atomic Structure of Large Angle Grain Boundaries Determined by Quantitative X-Ray Diffraction Techniques

Published online by Cambridge University Press:  26 February 2011

M. R. Fitzsimmons  and
S. L. Sass
M. R. Fitzsimmons
Affiliation:
Department of Materials Science and Engineering Cornell University, Ithaca, NY 14853
S. L. Sass
Affiliation:
Department of Materials Science and Engineering Cornell University, Ithaca, NY 14853
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Abstract

Quantitative X-ray diffraction techniques have been used to determine the atomic structures of the ∑ = 5 and 13 [001] twist boundaries in Au with a resolution of 0.09 Å or better. The reciprocal lattices of these boundaries were mapped out using synchrotron radiation. The atomic structures were obtained by testing model structures against the intensity observations with a chi square analysis. The boundary structures were modeled using polyhedra, including octahedra, special configurations of tetrahedra and Archimedian anti-prisms, interwoven together by the boundary symmetry. The results of this work point to the possibility of obtaining general rules for grain boundary structures based on X-ray diffraction observations that give the atomic positions with high resolution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 122: Symposium I – Interfacial Structure, Properties, and Design , 1988 , 27
Copyright
Copyright © Materials Research Society 1988

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References

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