Fabrication of nanostructured magnesium composite reinforced with MgO & Mg2Cu by in situ displacement reaction using high-energy ball-milled powders

Nanostructured Magnesium matrix composite reinforced with MgO & Mg2Cu was synthesized by in situ displacement reaction during mechanical milling of Mg and CuO powder mixture. CuO was reduced gradually by Mg and it concludes to formation of MgO and Mg2Cu during reduction reaction. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study structural evolution and powder morphology during different mechanical milling stages. Furthermore, the mean particle size distribution of the milled powders was determined by using a laser particle size analyzer. The grain size of matrix and lattice strain was determined to be 40 nm and 0.67% respectively. Powder Morphological investigations showed that flake-like and flatten particles were formed in initial stages and refiner powder particles in final stages of mechanical milling process.

Keywords:

Nanostructure , magnesium matrix composite , mechanical milling , in situ reaction