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Hrem Investigation of the Structure of the Σ5(210)/[001] Symmetric Tilt Grain Boundaries in Nb.

Published online by Cambridge University Press:  15 February 2011

G. H. Campbell ,
S. M. Foiles ,
Wayne E. King ,
M. Rühle  and
W. Wien
G. H. Campbell
Affiliation:
Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550 Max Planck Institut für Metallforschung, Institut für Werkstoffwissenschaft, Stuttgart, Germany
S. M. Foiles
Affiliation:
Sandia National Laboratories, Livermore, CA 94551
Wayne E. King
Affiliation:
Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550
M. Rühle
Affiliation:
Max Planck Institut für Metallforschung, Institut für Werkstoffwissenschaft, Stuttgart, Germany
W. Wien
Affiliation:
Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550
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Abstract

We have simulated the atomic structures of the Σ 5 (210)/[001 ] symmetric tilt grain boundary using interatomic potentials for Nb developed employing the embedded atom method (EAM) and the model generalized pseudopotential theory (MGPT). These potentials do not predict the same lowest energy structure for the Σ 5 (210)/[001]. Using the ultra high vacuum diffusion bonding process, we have fabricated Σ 5 (210)/[001] bicrystals. The samples have been observed using high resolution electron microscopy and the observed images have been compared with those simulated based on the structures predicted theoretically. The experimental result for the Σ 5 (210)/[001] is in close agreement with the structure predicted using the EAM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 229: Symposium Q – Structure/Property Relationships for Metal/Metal Interfaces , 1991 , 191
Copyright
Copyright © Materials Research Society 1991

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