Synthesis of Al2O3-ZrO2 Nanocomposite by Mechanical Activated Self-propagating High Temperature Synthesis and Ignited via Laser

Al2O3-ZrO2composite has unique properties such as high toughness, high wear resistant and relative low thermal expansion. In this study, nanocomposite of Al2O3-ZrO2 was produced by Mechanical activated Self propagating High-temperature Synthesis (MASHS) using laser beam for ignition. Al and ZrO2 powders were mixed in the mole ratio of 1:1 and milled for 1, 3 and 6 hours. The mixtures were pressed and were exposed by continuous wave (CW) CO2 laser for combustion reaction to start. In order to characterize the products, X-ray diffraction (XRD), scanning electron microscopy (SEM) and Energy-Dispersive X-ray spectroscopy (EDX) were implemented. The XRD results show that samples have α-Alumina and also cubic and monoclinic phases Zirconium oxides together. The dendrite structures were formed during the process.