Mechanochemical Synthesis of Alumina-Zirconia Nanocomposite Powder Containing Metastable Phases
T. Dallali isfahani, J. Javadpour, A. Khavandi, H. Rezaie, M. Goodarzi
Keywords: mechanochemical activation, alumina-zirconia nanocomposite powder, metastable phases
Pages: 573-576
Abstract
Alumina-zirconia nanocomposite powder with a particle size around 50 nm was synthesised by mechanochemical activation. Milled powders consisted of CaO and XRD amorphous aluminium and zirconium chloride phases. After annealing the milled powder at 360 oC displacement reactions occurred and ZrO2 and Al2O3 nanoparticles were formed in a CaCl2 matrix which was removed by washing. DTA, XRD and SEM analysis were applied to characterise the powders. The formation of cubic zirconia and α-alumina were observed at very low temperatures.
|
