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High-resolution electron microscopy of amorphization of Cu4 Ti3

Published online by Cambridge University Press:  31 January 2011

D.E. Luzzi  and
M. Meshii
D.E. Luzzi
Affiliation:
Department of Materials Science and Engineering and the Materials Research Center, Northwestern University, Evanston, Illinois 60201
M. Meshii
Affiliation:
Department of Materials Science and Engineering and the Materials Research Center, Northwestern University, Evanston, Illinois 60201
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Abstract

The electron irradiation-induced, crystalline-to-amorphous transition was studied in the intermetallic compound Cu4Ti3 by high-resolution electron microscopy. Using highresolution maps from the crystalline region into the amorphized region, the amorphization process and the amorphous structure were examined. The extent of chemical order in crystalline regions just prior to amorphization was studied by simultaneously imaging superlattice and fundamental lattice fringe contrast. The chemical order continuously decreased in these regions but faint superlattice contrast was recognized as long as the crystalline feature remained on the image, supporting the theory that chemical disordering is the major driving force for amorphization. The amorphization process appears to be evolutionary, leading to a nanocrystalline type of amorphous structure. A model of the amorphization process is proposed based on the present results and those from previous studies.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 5 , October 1986 , pp. 617 - 628
Copyright
Copyright © Materials Research Society 1986

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References

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