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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.
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Keywords
Al2O3, TiO2, laser treatment, Al2TiO5
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