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In-Situ TEM Crystallization of Anorthite-Glass Films on α-Al2O3

Published online by Cambridge University Press:  15 February 2011

Michael P. Mallamaci ,
James Bentley  and
C. Barry Carter
Michael P. Mallamaci
Affiliation:
Department Of Chemical Engineering And Materials Science, University Of Minnesota, 421 Washington Ave. Se, Minneapolis, Mn 55455–0132
James Bentley
Affiliation:
Metals And Ceramics Division, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, TN 37831–6376
C. Barry Carter
Affiliation:
Department Of Chemical Engineering And Materials Science, University Of Minnesota, 421 Washington Ave. Se, Minneapolis, Mn 55455–0132
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Abstract

Anorthite-glass films have been grown by pulsed-laser deposition on single-crystal α-Al2O3 substrates which were pre-thinned to electron transparency. The glass films were crystallized in the transmission electron Microscope (TEM), which allowed direct observation and video-recording of the crystallization process. Crystallization of these films in the TEM resulted in the formation of hexagonal and orthorhombic anorthite. The orthorhombic phase was the predominant product of glass films grown at elevated substrate temperatures and displayed strong epitaxy with the underlying substrate. In contrast, the hexagonal phase was the major constituent of films grown at ambient substrate temperature and displayed no clear epitaxy with the substrate. The differences in degree of epitaxy and phase structure may be evidence of ordering at the original glass/oxide interface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 567
Copyright
Copyright © Materials Research Society 1994

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References

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