Structural evolution of Al and Al-10Mg matrix nanocomposites reinforced with Al2O3 particles during high-energy ball milling

In the present work the effect of Al matrix and Al-10Mg matrix in metal matrix nanocomposites reinforced with Al2O3 particles on the morphological and microstructural changes during mechanical milling were investigated. The effect of Al2O3 content in powder mixtures was another goal of the present research. Average particle size of powders was determined by tangential method using SEM micrographs. The crystallite size and lattice strain were characterized by XRD peak profile analysis. The results showed that samples with Al-10Mg matrix reached to steady state about 20 h of milling operation, while sample without Mg took longer times to get to steady state. Also addition of Mg to Al matrix leads to reduction of particle size of milled powders at different milling times and accelerates the mechanical milling stages. In the presence of Mg crystallite size decreased from 45 to 31 nm and lattice strain increased from 0.45 to 0.56. The effect of different amounts of alumina content on the morphology and microstructure changes are not as effective as dissolved Mg atoms in Al matrix.

کلیدواژه ها:

Al-Mg matrix Nanocomposite ، Mechanical alloying ، Microstructure ، Particlesize ، Al2O3