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Surface Morphology of Single-Crystal Ceramics

Published online by Cambridge University Press:  26 February 2011

D.W. Susnitzky  and
C.B. Carter
D.W. Susnitzky
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
C.B. Carter
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
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Abstract

Surfaces of crystalline materials generally facet and form steps and ledges on low-index planes to reduce their total energy. A conventional wedge-shaped transmission electron microscope (TEM) thin foil, prepared slightly misoriented with respect to a low-index plane, provides a suitable geometry for the study of surface ledges, steps and facets. This TEM study characterizes the surface features of annealed thin foils prepared from various oxides with a range of nominally low-index orientations. Observations from single-crystal α-A12O3 and MgAl2O4 (spinel) will be included.

The steps and facets typically form along energetically favorable, low-index planes and bound terraces of low-index orientation. The structure of these features are discussed. In addition, surface step movement has been observed and monitored through a series of reannealing experiments on the same foil.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 82: Symposium I – Characterization of Defects in Materials , 1986 , 463
Copyright
Copyright © Materials Research Society 1987

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References

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