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Materials 2013, 6(5), 1826-1839; doi:10.3390/ma6051826
Article

Tensile and Compressive Responses of Ceramic and Metallic Nanoparticle Reinforced Mg Composites

1,†
,
2
,
1
 and
1,*
1 Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore 2 School of Mechanical and Systems Engineering, Newcastle University International Singapore (NUIS), 180 Ang Mo Kio Ave 8, 569830, Singapore Current address: Technology Development Centre, ITE College Central, 2 Ang Mo Kio Drive, 567720, Singapore.
* Author to whom correspondence should be addressed.
Received: 2 April 2013 / Revised: 24 April 2013 / Accepted: 27 April 2013 / Published: 7 May 2013
(This article belongs to the Special Issue Microwave Processing of Materials)
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Abstract

In the present study, room temperature mechanical properties of pure magnesium, Mg/ZrO2 and Mg/(ZrO2 + Cu) composites with various compositions are investigated. Results revealed that the use of hybrid (ZrO2 + Cu) reinforcements in Mg led to enhanced mechanical properties when compared to that of single reinforcement (ZrO2). Marginal reduction in mechanical properties of Mg/ZrO2 composites were observed mainly due to clustering of ZrO2 particles in Mg matrix and lack of matrix grain refinement. Addition of hybrid reinforcements led to grain size reduction and uniform distribution of hybrid reinforcements, globally and locally, in the hybrid composites. Macro- and micro- hardness, tensile strengths and compressive strengths were all significantly increased in the hybrid composites. With respect to unreinforced magnesium, failure strain was almost unchanged under tensile loading while it was reduced under compressive loading for both Mg/ZrO2 and Mg/(ZrO2 + Cu) composites.
Keywords: metal matrix composites; microwave sintering; mechanical properties; microstructure; scanning electron microscopy; X-ray diffraction metal matrix composites; microwave sintering; mechanical properties; microstructure; scanning electron microscopy; X-ray diffraction
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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Tun, K.S.; Wong, W.L.E.; Nguyen, Q.B.; Gupta, M. Tensile and Compressive Responses of Ceramic and Metallic Nanoparticle Reinforced Mg Composites. Materials 2013, 6, 1826-1839.

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