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.
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Ravishankar, N., Barry Carter, C. Bunching of Surface Steps and Facet Formation on Analumina Surface. Journal of Materials Research 17, 98–106 (2002). https://doi.org/10.1557/JMR.2002.0016
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DOI: https://doi.org/10.1557/JMR.2002.0016