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Differences Between the Atomic Structures of Grain Boundaries in Pure F. C. C. Metals and L12 Ordered Compounds

Published online by Cambridge University Press:  26 February 2011

V. Vitek ,
J. J. Kruisman  and
J. Th. M. De Hosson
V. Vitek
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, U. S. A.
J. J. Kruisman
Affiliation:
Department of Applied Physics, University of Groningen, Nijenborgh 18, 9747-AG, Groningen, The Netherlands
J. Th. M. De Hosson
Affiliation:
Department of Applied Physics, University of Groningen, Nijenborgh 18, 9747-AG, Groningen, The Netherlands
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Abstract

Atomic structure of [001] tilt boundaries in an ordered A3 B compound with Ll2 structure has been studied using model pair-potentials Ko describe atomic interactions. The structural features related to the ordering tendency as well as structural changes associated with deviations away from stoichiometry have been investigated. The differences between boundary structures in pure metals and compounds have been found to be most pronounced when the stoichiometry is preserved at the boundary. Possible significance of these structural aspects for understanding very different fracture behavior of pure f.c.c. metals and L12 compounds is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 122: Symposium I – Interfacial Structure, Properties, and Design , 1988 , 139
Copyright
Copyright © Materials Research Society 1988

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