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Experimental Determination Of Relaxation Of Interphase Interfaces In Oxide Eutectics

Published online by Cambridge University Press:  25 February 2011

Vinayak P. Dravid ,
V. Ravikumar ,
G. Dhalenne  and
A. Revcolevschi
Vinayak P. Dravid
Affiliation:
Department of Materials Science & Engineering, and Materials Research Center, Northwestern University, Evanston, IL 60208, USA
V. Ravikumar
Affiliation:
Department of Materials Science & Engineering, and Materials Research Center, Northwestern University, Evanston, IL 60208, USA
G. Dhalenne
Affiliation:
Laboratoire de Chimie des Solides, Universite de Paris-Sud, FRANCE
A. Revcolevschi
Affiliation:
Laboratoire de Chimie des Solides, Universite de Paris-Sud, FRANCE
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Abstract

Interphase interfaces in the directionally solidified eutectics.(DSEs) of NiO-ZrO2(CaO), NiO-Y2O3 and MnO-ZrO2 have been investigated using a variety of TEM techniques. The unique lamellar morphology of the DSEs allows characterization of interfaces and identification of relaxations along multiple directions, aiding visualization of interface structure in three dimensions. Possible low energy interface orientations were identified through examination of facets. The low energy interface planes almost invariably correspond to polar surfaces of adjacent crystals. An attempt has been made to experimentally identify the variety of interfacial relaxation mechanisms using a variety of analytical TEM techniques and only HRTEM results are summarized in this paper. It was found that most of the DSE systems exhibit very little relaxation and possess tight interface cores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 815
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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