Influence of Sintering Time on Properties of Alumina-Based Ceramic Composite

Abstract:

The authors have investigated the influence of sintering time at 1600 °C on microstructure, shrinkage, density, surface hardness and bending strength of Al₂O₃ based ceramic composites. From the ceramic powder mixes, the specimens were compacted by uniaxial pressing and during sintering the heating gradient was 100 °C/h. The experiments have shown that at 1600°C of sintering temperature, the specimen densifications have almost finished within 5 hours, meanwhile the crystal grows processes were continued for up to 9 hours of sintering. The authors have found that the maximum values of hardness and mechanical bending strength of specimens were obtained at 5 hours of sintering and these values have slowly decreased with increasing the sintering times.

• Periodical: Materials Science Forum (Volume 812)
• Pages: 143-147
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.812.143
• Online since: February 2015
• Authors: Dóra Lipusz*, Ákos Isztli, László A. Gömze
• Keywords: Alumina Based Ceramic, Microstructure, Properties, Sintering Time

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