Surface Morphology of Heat‐Treated Ceramic Thin Films
作者:
David W. Susnitzky,
C. Barry Carter,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 9
页码: 2463-2478
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb05599.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
The morphology of surfaces of several ceramic materials has been examined using transmission electron microscopy. The approach used was to prepare a sample for examination in the microscope, carefully clean it, and then heat‐treat it. In the case of the oxides studied (alumina and spinel) the samples were heated in air; the non‐oxides (α‐SiC andβ‐SiC) were annealed under vacuum. The morphology in all but one case was such that the surface faceted parallel to the nearest low‐index plane to give well‐defined terraces; these were separated by ledges which also tended to facet parallel to the traces of low‐index planes. The exception was the {1100} alumina surface, which appears to be unstable in air at temperatures close to 1400°C. A computer program using a multislice approach was used to estimate the height of the steps on the (0001) surface; the step heights appear to be multiples of theclattice parameter. A reconstruction of this surface as a result of this heat treatment
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