Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/84985
Title: Development of hierarchical magnesium composites using hybrid microwave sintering
Authors: Habibi, M.K.
Joshi, S.P. 
Gupta, M. 
Keywords: Al and Al 2O 3reinforcements
Ball milling
Hierarchical magnesium composite
Mechanical properties
Microwave sintering
Powder metallurgy
Issue Date: 2011
Source: Habibi, M.K.,Joshi, S.P.,Gupta, M. (2011). Development of hierarchical magnesium composites using hybrid microwave sintering. Journal of Microwave Power and Electromagnetic Energy 45 (3) : 112-120. ScholarBank@NUS Repository.
Abstract: In this work, hierarchical magnesium based composites with a micro-architecture comprising reinforcing constituent that is a composite in itself were fabricated using powder metallurgy route including microwave assisted rapid sintering technique and hot extrusion. Different level-I composite particles comprises sub-micron pure aluminum (Al) matrix containing Al2O3 particles of different length scale (from micrometer to nanometer size). Microstructural characterization of the hierarchical composites revealed reasonably uniform distribution of level-I composite particles and significant grain refinement compared to monolithic Mg. Hierarchical composite configurations exhibited different mechanical performance as a function of Al 2O 3length scale. Among the different hierarchical formulations synthesized, the hierarchical configuration with level-I composition comprising Al and nano-Al 2O 3(0.05 μm) exhibited the highest improvement in tensile yield strength (0.2% YS), ultimate tensile strength (UTS), tensile failure strain (FS), compressive yield strength (0.2% CYS) and ultimate compressive strength (UCS) (+96%, +80%, +42%, +80%, and +83%) as compared to monolithic Mg. An attempt has been made in the present study to correlate the effect of different length scales of Al 2O 3particulates on the microstructural and mechanical response of magnesium.
Source Title: Journal of Microwave Power and Electromagnetic Energy
URI: http://scholarbank.nus.edu.sg/handle/10635/84985
ISSN: 08327823
Appears in Collections:Staff Publications

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