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Mismatch and Misalignment at Interfaces Between Ag and Mn3O4 Studied With Hrtem

Published online by Cambridge University Press:  10 February 2011

B. J. Kooi ,
H. B. Groen  and
J.Th.M. De Hosson
B. J. Kooi
Affiliation:
Dept of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands, [email protected].
H. B. Groen
Affiliation:
Dept of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands, [email protected].
J.Th.M. De Hosson
Affiliation:
Dept of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands, [email protected].
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Abstract

Internal oxidation of Ag-3at.%Mn resulted in Mn3O4 precipitates with a “parallel” topotaxy with the metal matrix and an octahedron shape due to {111} facets. Due to the tetragonali ty of Mn3O4, only a few planes and directions of Ag and Mn3O4 can be actual parallel. The precipitates exhibited a preference to align {111} planes parallel with the matrix for one pair of facets and then for another pair a tilt of 7.6° occurs which is relieved by ledges in Ag. The dislocation structure at these parallel and tilted {111} interfaces, originating from a 1-dimensional mismatch and including phenomena such as stand-off and dissociation of dislocations, was scrutinized.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 466: Symposium G – Atomic Resolution Microscopy of Surfaces and Interfaces , 1996 , 39
Copyright
Copyright © Materials Research Society 1997

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References

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