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Laser Synthesis of Al₂TiO₅ Ceramics from Al₂O₃-TiO₂ Powder Mixtures

M. Vlasova¹, B. Sosa Coeto¹, M. Kakazey¹, P. A. Marquez Aguilar¹, ¹, A. Escobar Martinez¹, V. Stetsenko², A. Bykov²

¹ Center of Investigation in Engineering and Applied Sciences of the Autonomous University of the State of Morelos (CIICAp-UAEMor), Av. Universidad, 1001, Cuernavaca, Mexico.
² Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, 3, Krzhyzhanovsky St., Kiev, 252680, Ukraine

received January 25, 2012, received in revised form February 26, 2012, accepted March 21, 2012

Vol. 3, No. 2, Pages 61-68   DOI: 10.4416/JCST2012-00005

Abstract

The phase formation process in the zone of laser irradiation of Al₂O₃-TiO₂ compacts with different contents of components has been investigated with XRD, electron microscopy, and atomic force microscopy methods. The distinctive feature of laser synthesis is the simultaneous formation of α- and β-Al₂TiO₅, which is caused by the non-uniform heating of the material in the irradiation zone. The motion of the eutectic melt under the action of hydrodynamic forces is the motive force for texturing of precipitating crystalline phases during fast cooling. The degree of texturing of Al₂O₃ and Al₂TiO₅ crystallites depends on the amount of the formed eutectic melt.

Keywords

Al₂O₃, TiO₂, laser treatment, Al₂TiO₅

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