Abstract
In recent years considerable attention has been attracted to magnesium because of its light weight, high specific strength, and ease of recycling. Because of the growing demand for lightweight materials in aerospace, medical and automotive industries, magnesium-based metal matrix nanocomposites (MMNCs) reinforced with ceramic nanometer-sized particles, graphene nanoplatelets (GNPs) or carbon nanotubes (CNTs) were developed. CNTs have excellent material characteristics like low density, high tensile strength, high ratio of surface-to-volume, and high thermal conductivity that makes them attractive to use as reinforcements to fabricate high-performance, and high-strength metal-matrix composites (MMCs). Reinforcing magnesium (Mg) using small amounts of CNTs can improve the mechanical and physical properties in the fabricated lightweight and high-performance nanocomposite. Nevertheless, the incorporation of CNTs into a Mg-based matrix faces some challenges, and a uniform distribution is dependent on the parameters of the fabricating process. The characteristics of a CNTs reinforced composite are related to the uniform distribution, weight percent, and length of the CNTs, as well as the interfacial bonding and alignment between CNTs reinforcement and the Mg-based matrix. In this review article, the recent findings in the fabricating methods, characterization of the composite’s properties, and application of Mg-based composites reinforced with CNTs are studied. These include the strategies of fabricating CNT-reinforced Mg-based composites, mechanical responses, and corrosion behaviors. The present review aims to investigate and conclude the most relevant studies conducted in the field of Mg/CNTs composites. Strategies to conquer complicated challenges are suggested and potential fields of Mg/CNTs composites as upcoming structural material regarding functional requirements in aerospace, medical and automotive industries are particularly presented.
Highlights
Modern technologies have a high demand for lightweight but robust materials in load-bearing applications
It has been confirmed that carbon nanotubes (CNTs) exhibit ultra-high-modulus and strength, and have anisotropic electrical conductivity when incorporated in a matrix, they can remarkably enhance fabricated nanocomposites
Gupta and co-workers applied the Disintegrated Melt Deposition (DMD) and extrusion processes for fabricating the Mg-multi-walled CNTs (MWCNTs) nanocomposites [88,93]. They showed that the yield strength (YS), ultimate tensile strength (UTS), and tensile elongation of Mg could be enhanced by the incorporation of 0.3 and 1.3 wt.% of MWCNTs
Summary
Somayeh Abazari 1 , Ali Shamsipur 1 , Hamid Reza Bakhsheshi-Rad 2,3, *, Ahmad Fauzi Ismail 3 , Safian Sharif 4 , Mahmood Razzaghi 2 , Seeram Ramakrishna 5, * and Filippo Berto 6, *. Nanoscience and Nanotechnology Initiative, National University of Singapore, 9 Engineering Drive 1, Singapore 1157, Singapore. Received: 13 August 2020; Accepted: 28 September 2020; Published: 4 October 2020
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