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Licensed Unlicensed Requires Authentication Published by De Gruyter December 30, 2021

Orientation Imaging Microscopy of Alpha Alumina: Sample Preparation and Texture Analysis

Maureen L. Mulvihill, Mehmet A. Gülgün, Ewald Bischoff and Manfred Rühle

Abstract

Orientation imaging microscopy (OIM) was used to study hot isostatically pressed (HIP) 99.99 % α-Al2O3. A sample preparation procedure for nonconducting ceramics and a preliminary texture analysis are given. The sample preparation procedure was optimized to produce a thin conductive coating, a smooth well polished and at the same time nearly strain free surface. In these alumina samples, the grain area ranged from 350 to 4000 μm2. Several grains exhibited a [0001] orientation with misorientation angles between two adjacent grains near 60°. From contour inverse pole figures, a slight texture, two times random, was determined along the sample “rolling direction” [100] which corresponded to the extrusion direction of the green body.


M. L. Mulvihill, M. A. Gülgün, E. Bischoff, M. Rühle Max-Planck-Institut für Metallforschung Seestr. 92 D-70174 Stuttgart Germany

  1. The authors would like to thank the German Israel Foundation (GIF) for the financial support of this project and the Alexander von Humboldt Stiftung for the research fellowship given to Dr. M. L. Mulvihill. They would also like to thank M. Kallfass, S. Kühnemann and H. Maier for their technical assistance.

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Received: 1998-01-28
Published Online: 2021-12-30

© 1998 Carl Hanser Verlag, München