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High-Temperature In Situ Straining Experiments in the High-Voltage Electron Microscope

Published online by Cambridge University Press:  28 July 2005

Ulrich Messerschmidt
Affiliation:
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle/Saale D-06120, Germany
Dietmar Baither
Affiliation:
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle/Saale D-06120, Germany Dietmar Baither's present address is Institute of Metals Research, Münster University, Wilhelm-Klemm-Str. 10, Münster D-48149, Germany
Martin Bartsch
Affiliation:
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle/Saale D-06120, Germany
Bernd Baufeld
Affiliation:
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle/Saale D-06120, Germany Bernd Baufeld's present address is Institute of Materials Science, Martenstrasse 5, Erlangen D-91058, Germany
Bert Geyer
Affiliation:
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle/Saale D-06120, Germany
Susanne Guder
Affiliation:
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle/Saale D-06120, Germany
Anna Wasilkowska
Affiliation:
Faculty of Metallurgy and Materials Science, University of Mining and Metallurgy, Al. Mickiewicza 30, Krakow 30-059, Poland
Aleksandra Czyrska-Filemonowicz
Affiliation:
Faculty of Metallurgy and Materials Science, University of Mining and Metallurgy, Al. Mickiewicza 30, Krakow 30-059, Poland
Masaharu Yamaguchi
Affiliation:
Department of Metal Science and Technology, Kyoto University, Kyoto 606-01, Japan
Michael Feuerbacher
Affiliation:
Institute of Solid State Research, Jülich Research Centre, Jülich D-52425, Germany
Knut Urban
Affiliation:
Institute of Solid State Research, Jülich Research Centre, Jülich D-52425, Germany

Abstract

Design rules are described here for high-temperature straining stages for transmission electron microscopy. Temperatures above 1000°C can be attained by electron bombardment of the specimen grips. Thermal equilibrium can be reached in a short time by carrying off the heat by water cooling. Some applications of this stage are described. Ferroelastic deformation was observed at 1150°C in t′ and partially stabilized zirconia, which changes the microstructure for successive dislocation plasticity. In the oxide-dispersion-strengthened alloy INCOLOY MA 956, dislocations are impeded by oxide particles and move smoothly between the particles. At high temperatures, both the resting and traveling times control the average dislocation velocity. In MoSi2 single crystals of a soft orientation, dislocations with 1/2〈111〉 Burgers vectors are created in localized sources and move on {110} planes in a viscous manner. The dislocations in Al-Pd-Mn single quasicrystals are oriented in preferred crystallographic directions and move in a viscous way as well. On the basis of in situ observations, conclusions are drawn for interpreting macroscopic deformation behavior at high temperatures.

Type
1998 ASU ELECTRON MICROSCOPY WORKSHOP
Copyright
© 2005 Microscopy Society of America

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