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Materials 2017, 10(6), 621; doi:10.3390/ma10060621

Using B4C Nanoparticles to Enhance Thermal and Mechanical Response of Aluminum

1
Center for Advanced Materials, Qatar University, Doha 2713, Qatar
2
Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43721, Egypt
3
Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Received: 24 April 2017 / Revised: 19 May 2017 / Accepted: 1 June 2017 / Published: 6 June 2017
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Abstract

In this work, Al-B4C nanocomposites were produced by microwave sintering and followed by hot extrusion processes. The influence of ceramic reinforcement (B4C) nanoparticles on the physical, microstructural, mechanical, and thermal characteristics of the extruded Al-B4C nanocomposites was investigated. It was observed that the density decreased and porosity increased with an increase in B4C content in aluminum matrix. The porosity of the composites increased whereas density decreased with increasing B4C content. Electron microscopy analysis reveals the uniform distribution of B4C nanoparticles in the Al matrix. Mechanical characterization results revealed that hardness, elastic modulus, compression, and tensile strengths increased whereas ductility decreases with increasing B4C content. Al-1.0 vol. % B4C nanocomposite exhibited best hardness (135.56 Hv), Young’s modulus (88.63 GPa), and compression/tensile strength (524.67/194.41 MPa) among the materials investigated. Further, coefficient of thermal expansion (CTE) of composites gradually decreased with an increase in B4C content. View Full-Text
Keywords: Al-B4C nanocomposites; microwave sintering; hot extrusion; mechanical properties; thermal expansion Al-B4C nanocomposites; microwave sintering; hot extrusion; mechanical properties; thermal expansion
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MDPI and ACS Style

Ubaid, F.; Matli, P.R.; Shakoor, R.A.; Parande, G.; Manakari, V.; Mohamed, A.M.A.; Gupta, M. Using B4C Nanoparticles to Enhance Thermal and Mechanical Response of Aluminum. Materials 2017, 10, 621.

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