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Structures of Nb/Al2O3 Interfaces Produced by Different Experimental Routes

Published online by Cambridge University Press:  21 February 2011

J. Mayer ,
W. Mader ,
D. Knauss ,
F. Ernst  and
M. Rühle
J. Mayer
Affiliation:
Formerly with: Materials Department, University of California, Santa Barbara, CA 93106
W. Mader
Affiliation:
Max-Planck-Institut für Metallforschung, D-7000 Stuttgart 1, FRG
D. Knauss
Affiliation:
Max-Planck-Institut für Metallforschung, D-7000 Stuttgart 1, FRG
F. Ernst
Affiliation:
Max-Planck-Institut für Metallforschung, D-7000 Stuttgart 1, FRG
M. Rühle
Affiliation:
Formerly with: Materials Department, University of California, Santa Barbara, CA 93106
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Abstract

Nb/Al2O3 interfaces were produced by (i) diffusion bonding of single crystalline Nb and Al2O3 at 1973 K, (ii) internal oxidation of a Nb-3at.% Al alloy at 1773 K, and (iii) molecular beam epitaxy (MBE) growth of 500 nm thick Nb overlayers on sapphire substrates at 1123 K. Cross-sectional specimens were prepared and studied by conventional (CTEM) and high resolution transmission electron microscopy (HREM). The orientation relationships between Nb and Al2O3 were identified by diffraction studies. HREM investigations revealed the structures of the different interfaces including the presence of misfit dislocations at or near the interface. The results for the different interfaces are compared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 183: Symposium E – High Resolution Electron Microscopy of Defects in Materials , 1990 , 55
Copyright
Copyright © Materials Research Society 1990

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References

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