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Tensile and Compressive Responses of Ceramic and Metallic Nanoparticle Reinforced Mg Composites
Materials 2013, 6(5), 1940-1955; doi:10.3390/ma6051940
Article

Synthesis and Characterization of Nano Boron Nitride Reinforced Magnesium Composites Produced by the Microwave Sintering Method

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Received: 11 April 2013 / Revised: 3 May 2013 / Accepted: 6 May 2013 / Published: 10 May 2013
(This article belongs to the Special Issue Microwave Processing of Materials)
Download PDF [2728 KB, 14 May 2013; original version 10 May 2013]

Abstract

In this study, magnesium composites with nano-size boron nitride (BN) particulates of varying contents were synthesized using the powder metallurgy (PM) technique incorporating microwave-assisted two-directional sintering followed by hot extrusion. The effect of nano-BN addition on the microstructural and the mechanical behavior of the developed Mg/BN composites were studied in comparison with pure Mg using the structure-property correlation. Microstructural characterization revealed uniform distribution of nano-BN particulates and marginal grain refinement. The coefficient of thermal expansion (CTE) value of the magnesium matrix was improved with the addition of nano-sized BN particulates. The results of XRD studies indicate basal texture weakening with an increase in nano-BN addition. The composites showed improved mechanical properties measured under micro-indentation, tension and compression loading. While the tensile yield strength improvement was marginal, a significant increase in compressive yield strength was observed. This resulted in the reduction of tension-compression yield asymmetry and can be attributed to the weakening of the strong basal texture.
Keywords: metal matrix composites; microwave sintering; mechanical properties; microstructure; X-ray diffraction; scanning electron microscopy metal matrix composites; microwave sintering; mechanical properties; microstructure; X-ray diffraction; scanning electron microscopy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Seetharaman, S.; Subramanian, J.; Tun, K.S.; Hamouda, A.S.; Gupta, M. Synthesis and Characterization of Nano Boron Nitride Reinforced Magnesium Composites Produced by the Microwave Sintering Method. Materials 2013, 6, 1940-1955.

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