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Improving Compressive Strength and Oxidation Resistance of AZ31B Magnesium Alloy by Addition of Nano-Al₂O₃ Particulates and Ca

Department of Mechanical Engineering, National University of Singapore, Singapore

^* To whom correspondence should be addressed. E-mail: mpegm{at}nus.edu.sg.

	Abstract

In the present study, new light weight nanocomposites (AZ31-1.5Al₂O₃-Ca) based on magnesium alloy AZ31B are developed using disintegrated melt deposition technique. Microstructural characterization studies revealed equiaxed grain structure, minimal porosity, and good matrix-reinforcement interfacial integrity. The results also showed that addition of both nano-Al₂O₃ and Ca led to a simultaneous improvement in 0.2% yield compressive strength (0.2% YCS), ultimate compressive strength (UCS), and work of fracture (WoF) of the AZ31B magnesium alloy while failure strain was slightly compromised. Moreover, excellent oxidation resistance of this composite was realized when compared to AZ31B up to 500°C. The results suggest that this composite formulation can be used in diverse engineering applications requiring light weight structural materials.

First published on October 12, 2009
Journal of Composite Materials 2009, doi:10.1177/0021998309349551


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