Obtaining of Nanocomposites in SiC-SiAlON and Al₂O₃-SiAlON System by Alumothermal Processes

Z. Kovziridze, N. Nizharadze, G. Tabatadze, T. Cheishvili, Z. Mestvirishvili, E. Nikoleishvili, M. Mshvildadze, N. Darakhvelidze

Department of Chemical and Biological Technologies, Georgian Technical University, Tbilisi, Georgia.

DOI: 10.4236/jectc.2014.44012                

Abstract

Composites were obtained in the in SiC-SiAlON and Al₂O₃-SiAlON system. Physical-chemical processes going on at the obtaining of SiALON within the range of 800°C - 1500°C were studied. Charge compositions and sintering regime were selected. It was proved that X-SiALON was obtained at the sintering of kaolin-aluminum powder at 1500°C, while β-SiALON was formed at the sintering of SiC-Aluminum powder, silicium and Al₂O₃-aluminum powder, silicium at 1500°C. Corrosion properties of the materials were studied. Investigations were performed by the methods of X-Ray structural and microscopical analysis.

Keywords

Composite, Silicium Carbide, Corundum, Silicium Nitride, Aluminum Nitride, Mullite, SiALON

Conflicts of Interest

The authors declare no conflicts of interest.

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