Improving overall mechanical performance of magnesium using nano-alumina reinforcement and energy efficient microwave assisted processing route

Abstract

The development of lightweight and high performance Mg/Al2O 3 nanocomposites through the use of a cost-effective and energy efficient microwave sintering technique was investigated. Characterization studies were conducted following hot extrusion to evaluate the physical, microstructural, and mechanical properties of the synthesized materials. Macrostructural characterization conducted on the as-sintered billets revealed absence of macrostructural defects such as circumferential or radial cracks. Near theoretical density was realized for microwave sintered magnesium and composite formulations after extrusion. Microstructural characterization conducted on microwave sintered and extruded composite revealed the presence of a network of nano-sized particulates decorating the particle boundaries of the matrix similar to that observed by other researchers working on aluminum and magnesium based composites reinforced with nanoparticles.