Influence of Heat Treatment in Sintering Process on Characteristics of Al2o3-Zro2 Ceramics Systems
A. Rittidech and T. Tunkasiri
DOI : 10.3844/ajassp.2009.309.312
American Journal of Applied Sciences
Volume 6, Issue 2
Al2O3-ZrO2 ceramics containing 5-50 mol% ZrO2 were prepared by solid state reaction method. The bulk density, average grain size and microhardness of Al2O3-ZrO2 ceramics system as function of ZrO2 content were investigated. The dense Al2O3-ZrO2 ceramics were successfully by means of carefully control processing parameters that include sintering temperature and heating/cooling rates. These ceramics with higher ZrO2 content was obtained high bulk densities and small grain sizes. However, the high hardness values were exhibited from Al2O3-ZrO2 ceramics with dopants ZrO2 between 1-10mol% and its tend to decrease with concentration of ZrO2. It can be found that the fast heating/cooling rates are controlled grain growth and obtained high hardness in materials. The results gave good correlation between stoichiometry characteristics, heating/cooling rates in sintering and microstructure of fabricated dense and mechanical properties.
© 2009 A. Rittidech and T. Tunkasiri. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.