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Licensed Unlicensed Requires Authentication Published by De Gruyter November 29, 2018

The grain growth in alumina compacts sintered under high pressure

  • Zeynep Taslicukur Ozturk and Nilgun Kuskonmaz


In this study, alumina ceramics were produced with high density and nanograin size without additives from nano-size γ-Al2O3. The effects of sintering pressure (3 GPa and 7 GPa) and temperature (600 °C and 1 200 °C) on the grain size of sintered samples were studied. It was shown that high pressure increases the nucleation rate while reducing the growth rate of the transformed α phase. Pressure-assisted densification decreases grain size, so that nano-scale grains can be achieved in the sintered structure. The effect of various sintering conditions on grain growth in alumina was investigated during high-pressure sintering for better understanding of pressure and temperature effects on microstructural properties.

*Correspondence address, Assist. Prof. Dr. Zeynep Taslicukur Ozturk, Faculty of Engineering, Metallurgy and Materials Engineering, Istanbul Gedik University, Cumhuriyet Road İlkbahar Street No: 3 Kartal, Istanbul, 34876, Turkey, Tel.: +904445438(1186), Fax: +90(216)4528717, E-mail:


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Received: 2018-03-21
Accepted: 2018-07-25
Published Online: 2018-11-29
Published in Print: 2018-12-10

© 2018, Carl Hanser Verlag, München

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