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Qualitative and quantitative analysis of twin structure in top seeding melt texture growth-processed YBa2Cu3O7−δ ceramics

Published online by Cambridge University Press:  15 June 2001

F. Delorme ,
I. Monot-Laffez ,
C. Harnois  and
G. Desgardin
F. Delorme*
Affiliation:
Laboratoire CRISMAT (UMR CNRS-ISMRA 6508), 6 boulevard Maréchal Juin, 14050 Caen Cedex, France
I. Monot-Laffez
Affiliation:
Present address: Laboratoire LEMA (CNRS FRE-2077 - CEA-LRC M01), IUT de Blois, 3 place Jean Jaurès, CS2903, 41029 Blois, France
C. Harnois
Affiliation:
Laboratoire CRISMAT (UMR CNRS-ISMRA 6508), 6 boulevard Maréchal Juin, 14050 Caen Cedex, France
G. Desgardin
Affiliation:
Laboratoire CRISMAT (UMR CNRS-ISMRA 6508), 6 boulevard Maréchal Juin, 14050 Caen Cedex, France
*
[email protected]
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Abstract

The present study reviews the techniques suitable for twin characterisation in TSMTG-processed ceramics: Conventional Transmission Electron Microscopy, Scanning Electron Microscopy (backscattered electrons images), and X-ray diffraction (pole figures). Optical microscopy can not be used because twin spacing in the studied ceramics are smaller than this technique resolution. A difference between SEM looking like twins average spacing and TEM twins average spacing is pointed out and some explanations are envisaged. Concerning X-ray diffraction, rocking curves can not be used to characterise twins in textured ceramics, but pole figures allow qualitative measurements.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 14 , Issue 3 , June 2001 , pp. 159 - 163
Copyright
© EDP Sciences, 2001

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