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Plasticity Mechanism of Indium Antimony (InSb) in the Brittle Regime: Combined Study with Conventional TEM and LACBED

Published online by Cambridge University Press:  01 February 2011

Bouzid Kedjar ,
Ludovic Thilly ,
Jean-Luc Demenet  and
Jacques Rabier
Bouzid Kedjar
Affiliation:
[email protected], University of Poitiers, Laboratoire de Métallurgie Physique-SP2MI, SP2MI, Teleport 2, BP30179, Bd Curie, Futuroscope, 86962, France
Ludovic Thilly
Affiliation:
[email protected], University of Poitiers, Laboratoire de Métallurgie Physique-SP2MI, SP2MI, Telepor t 2, BP30179, Bd Curie, Futuroscope, 86962, France
Jean-Luc Demenet
Affiliation:
[email protected], University of Poitiers, Laboratoire de Métallurgie Physique-SP2MI, SP2MI, Teleport 2, BP30179, Bd Curie, Futuroscope, 86962, France
Jacques Rabier
Affiliation:
[email protected], University of Poitiers, Laboratoire de Métallurgie Physique-SP2MI, SP2MI, Teleport 2, BP30179, Bd Curie, Futuroscope, 86962, France
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Abstract

Indium antimony (InSb) has been deformed in compression under gaseous confining pressure (Paterson apparatus) above and below the brittle to ductile transition occurring around 150°C. Thin foils have been prepared from the deformed samples and dislocations were characterized with conventional TEM as well as LACBED. This paper focuses on the room temperature deformation microstructures which appeared to be extremely complex with the observation of very well arranged network of perfect and partial dislocations. In such case, the traditional dislocation extinction conditions were extremely difficult to apply and only the use of the LACBED technique uncovered the nature of the observed dislocations and gave further insight to their interactions, revealing in particular the presence of partial dislocation dipoles. These original observations suggest a change of deformation mechanism at the brittle to ductile transition temperature.

Keywords

dislocationstransmission electron microscopy (TEM)microstructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1026: Symposium C – Quantitative Electron Microscopy for Materials Science , 2007 , 1026-C11-01
Copyright
Copyright © Materials Research Society 2008

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