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Open AccessArticle

Novel AM60-SiO2 Nanocomposite Produced via Ultrasound-Assisted Casting; Production and Characterization

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Department of Mechanical Engineering, Islamic Azad University, Hamedan Branch, 6518115743 Hamedan, Iran
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Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan, 8174673441 Isfahan, Iran
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Department of Materials Engineering, Isfahan University of Technology, 84156-83111 Isfahan, Iran
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Department of Applied Science and Technology, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Torino, Italy
*
Author to whom correspondence should be addressed.
Materials 2019, 12(23), 3976; https://doi.org/10.3390/ma12233976
Received: 8 November 2019 / Revised: 22 November 2019 / Accepted: 26 November 2019 / Published: 30 November 2019
(This article belongs to the Special Issue Mechanical and Physical Properties of Metallic Composites)
There has been growing interest in developing new materials with higher strength-to-weight ratios. Therefore, AM60 magnesium alloy reinforced with SiO2 nanoparticles was synthesized using ultrasound-casting method for the first time, in this study. We introduced 1 and 2 wt.% of SiO2 nanoparticles into the samples. Introduction of nanoparticles led to the grain size drop in MS2 (AM60 + 2 wt.% SiO2) samples. In addition, this increased the hardness of samples from 34.8 Vickers hardness (HV) in M (AM60) to 51.5 HV in MS2, and increased the compressive strength of MS2. Improvement of the mechanical properties can be attributed to a combination of Orowan, Hall–Petch and load-bearing mechanisms. However, ductility of the composites decreased with fracture strains being 0.41, 0.39 and 0.37, respectively, for samples M, MS1 and MS2. Fracture surfaces showed shear fracture in both composite samples with microcracks and a more brittle fracture in MS2. View Full-Text
Keywords: metal matrix composites (MMCs); casting; mechanical properties; magnesium alloy metal matrix composites (MMCs); casting; mechanical properties; magnesium alloy
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Barati, F.; Latifi, M.; Moayeri far, E.; Mosallanejad, M.H.; Saboori, A. Novel AM60-SiO2 Nanocomposite Produced via Ultrasound-Assisted Casting; Production and Characterization. Materials 2019, 12, 3976.

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