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Electron Microscopy Study of the Structure of the £ =9, 11 Symmetrical Tilt Grain Boundaries in Germanium

Published online by Cambridge University Press:  15 February 2011

Anne-Marie Papon ,
Maurice Petit ,
Georges Silvestre  and
Jean-Jacques Bacmann
Anne-Marie Papon
Affiliation:
Centre d'Etudes Nucléaires, DMG/SER, 85 X, 38041 GRENOBLE CEDEX, FRANCE
Maurice Petit
Affiliation:
Centre d'Etudes Nucléaires, DMG/SER, 85 X, 38041 GRENOBLE CEDEX, FRANCE
Georges Silvestre
Affiliation:
Centre d'Etudes Nucléaires, DMG/SER, 85 X, 38041 GRENOBLE CEDEX, FRANCE
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Abstract

The structure of the £=9 and £=11 tilt grain boundaries about [011] axis is studied by means of complementary electron microscopy techniques. Using α'fringes it is shown that the £=1l boundary translations amount to a large expansion and that the £ =9 is little dilated while the translation along [411] is not accessible. The diffraction technique yields the missing result : there is no translation along [411] : the boundary periodicity is not in both cases that of the coincidence site lattice. A supplementary symmetry occurs in the £ =9 boundary which leads to a shortest periodicity. The observations are consistent with the model of five- and seven-fold rings describing the £ =9 boundary. A model, without dangling bond, which consists in a combination of the £ =9 and £ =3 (coherent twin) patterns, is proposed for the £ =ll boundary.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 5: Symposium B – Grain Boundaries in Semiconductors , 1981 , 27
Copyright
Copyright © Materials Research Society 1982

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References

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