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Tm Analysis of Interfaces Beiween Nb and Al2O3 Precipitates

Published online by Cambridge University Press:  26 February 2011

W. Mader
W. Mader*
Affiliation:
Max—Planck—Institut für Metallforzchung, Institut für Werkstoffwissenschaften, Seestrasse 92, 7000 Stuttgart 1, Federal Republic of Germany
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Abstract

A Nb—Al alloy has been internally oxidized to produce A12O3precipitates. The interface between plate—like AI2O3 precipitates and the Nb matrix has been investigated by diffraction, CTEM, and HREM techniques. Periodic arrays of misfit dislocations were observed which acted as diffraction gratings for the electrons. The location of misfit dislocation cores could be determined from HREM images within an accuracy of a few lattice spacings. It can be concluded that the misfit dislocations lead to a good matching of atomic rows across the interface. The dislocation arrangement at this partially coherent interface is in accordance with theoretical expectations from dislocation theory.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 82: Symposium I – Characterization of Defects in Materials , 1986 , 403
Copyright
Copyright © Materials Research Society 1987

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References

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