Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: 42, Pages: 1-5
M. R. Akbarpour1 *, S. Alipour1 , F. Leisi Azar1 and F. S. Torknik2
1Department of Materials Engineering, Faculty of Engineering, University of Maragheh, P.O. Box 83111-55181, Maragheh, Iran; [email protected], [email protected], [email protected] 2Materials and Energy Research Center (MERC), P.O. Box 14155-4777, Tehran, Iran; [email protected]
*Author for correspondence
M. R. Akbarpour
Department of Materials Engineering, Faculty of Engineering, University of Maragheh, P.O. Box 83111-55181, Maragheh, Iran; [email protected]
Objectives: This research is conducted in order to fabricate nanostructured Al reinforced with SiC nanoparticles to achieve high mechanical properties. Methods/Statistical Analysis: Nanostructured Al and nanocomposite of Al reinforced with SiC nanoparticles were fabricated by mechanical alloying of Al and Al-SiC mixture powders, respectively and hot pressing. The microstructures of the fabricated materials were investigated by Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD). Also, the microhardness of the produced materials was measured by Vickers microhardness instrument. Findings: Mechanical alloying of constituents for 30 h resulted in production of nanocrystalline Al and Al-SiC powders with the average grain size of 83 nm and 72 nm, respectively and uniform distribution of SiC nanoparticles in Al matrix. Al and Al-SiC nanostructured bulk samples with the densities of 2.66 and 2.61 g/cm3 and enhanced hardness values of ~111 and ~ 150 Hv, respectively were produced through hot consolidation of the milled powders. Applications/Improvements: Al-SiC nanocomposite with superior hardness was fabricated by grain refinement of Al matrix and strengthening by SiC nanoparticles. SiC nanoparticles retarded grain growth during hot consolidation.
Keywords: Aluminum, Hardness, Mechanical Milling, Nanocomposite, SiC
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