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Bunching of Surface Steps and Facet Formation on Analumina Surface

Published online by Cambridge University Press:  31 January 2011

N. Ravishankar  and
C. Barry Carter
N. Ravishankar
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota,421 Washington Ave. S.E., Minneapolis, Minnesota 55455
C. Barry Carter*
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota,421 Washington Ave. S.E., Minneapolis, Minnesota 55455
*
a)Address all correspondence to this author. e-mail: carter@cems.umn.edu
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Abstract

The behavior of steps on the basal surface of alumina under conditions of evaporativemass transport has been investigated. Steps on a clean surface of alumina tend to be uniformly spaced indicating a repulsive interaction between the steps. The presence of foreign particles causes step bunching that leads to the formation of a new facet. The lower energy of the macrofacet may provide a driving force for the bunching process.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 1 , January 2002 , pp. 98 - 106
Copyright
Copyright © Materials Research Society 2002

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