Table of Contents
Textures and Microstructures
Volume 24 (1995), Issue 1-3, Pages 167-197
http://dx.doi.org/10.1155/TSM.24.167

Texture and Properties of αAl2O3 Substrates

Department of Physical Metallurgy, Technical University of Clausthal, Hoechst CeramTec Selb, Germany

Received 10 February 1995

Copyright © 1995 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Texture formation in Al2O3 substrates after green forming and sintering was studied. The results can be well represented in a texture formation diagram in terms of the green texture and a sintering factor. The sintering factor is related to grain growth. It can be quantified in terms of sintering time and temperatur with a growth rate factor depending on boundary energy and mobility. Two different regions of sintering temperatures can be distinguished of which the high-temperature one is related to liquid phase sintering.

Mechanical properties of the substrates were also studied, particularly thermal cycling fatigue of copper plated substrates as well as thermal shock resistence and bending fracture strength. These properties are influenced in different ways by the texture. The properties can be understood taking also the misorientation distribution of the grain boundaries into account.