Development and Characterization of Novel Magnesium Nano Composite Using Powder Metallurgy

Abstract

ABSTRACT newlineMagnesium based alloys have been attracting much attention as light weight newlinematerials due to their high specific strength, good machinability, high damping capacity, newlineand their availability as a natural minerals. Magnesium materials are 35% and 75% newlinelighter when compared to aluminum and iron based materials, respectively. However, newlinemajor limiting factors in using magnesium include its low ductility, rapid loss of strength newlinewith increase in service temperature, poor creep and corrosion resistance. The primary newlinefocus currently was to develop new generation of nano-composite materials capable of newlineexhibiting good combination of mechanical properties. This is necessary in order to fulfill newlinethe requirements in applications such as in aerospace, automobile and sport sectors. In newlinethis project, new nano-composites based on AZ31 B were developed to address these newlineIssues. newlineInitially, AZ31B Mg alloy was developed by powder metallurgy route followed newlineby hot extrusion. The extruded materials were characterized for microstructure, X-ray newlinediffraction (XRD), Energy dispersive X-rays (EDX), fracture behaviour, density, porosity newlineand mechanical properties such as tensile, compression, impact and micro hardness. newlineMicrostructural characterization showed homogeneous distribution of particles in the Mg newlinematrix. XRD exhibited the formation of Mg17AI12 compound. The microhardness newlinemeasurement showed increase in hardness due to stress-relieving. Porosity measurement newlineof the samples showed minimal porosity. The mechanical properties such as tensile, newlinecompression and impact of the developed material showed significant improvement when newlinecompared to other processing techniques. Fracture characterization of the fractured newlinesurface showed quasi-cleavage fracture. newlineCoconut shell charcoal, it is nothing but the charcoal obtained by burning coconut newlineshells of fully matured nuts in limited supply of air sufficient only for carbonization. newlineSince the particle size of charcoal used in the study is of nano size it is called nano newlinecoconut shell charcoal (ncsc). Secondly