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Metals
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Ceramic Reinforced Metal Matrix Nanocomposites
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Ceramic Reinforced Metal Matrix Nanocomposites

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Matrix Composites".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 4283

Special Issue Editor

Prof. Dr. Wonhee Lee

E-Mail Website
Guest Editor
Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
Interests: nanocomposites; materials design; phase transformation; powder metallurgy

Special Issue Information

Dear Colleagues,

Metal matrix composites have been widely developed and studied for over a century. The recent advances in production technologies require new materials that can be used in high-tech structural and functional applications including aerospace, biomedical, automotive, packaging, and sports. Metal matrix composites provide great mechanical properties, such as high strength and elastic modulus and improved wear resistance. In recent years, nanoparticle-reinforced metal matrix composites have drawn wide attention as they provide high strength and can be used to produce lightweight components. Even small amounts of nanoparticles can improve the properties of the matrix metal in a remarkable way by means of Hall–Petch or Orowan strengthening. Moreover, the matrix metal with nano- and ultrafine grains is more efficient especially in terms of strengthening. Nevertheless, the most accurate requirements for the choices of suitable matrix, reinforcement, and techniques (processing and post-processing) are not completely defined. Therefore, it is very interesting to deeply investigate the connection between the features, constituents, including the matrix, reinforcement, interphases, and also production techniques. The aim of this Special Issue is to cover the recent progress and new developments regarding all aspects of ceramic-reinforced metal matrix nanocomposites. Original articles and review papers will deal with the following themes:

  • Processing and characterization of any type of ceramics and matrix metals;
  • Microstructural evaluation and physical and structural characterization;
  • Optimization of properties and processes including calculations;
  • Simulation of properties over length-scales;
  • Novel applications of ceramic-reinforced metal matrix nanocomposites.

Prof. Dr. Wonhee Lee
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Nanocomposite
  • Ceramics
  • Metals
  • Dispersion
  • Reinforcement
  • Sintering
  • Microstructure
  • Mechanical properties
  • Tribology

Published Papers (2 papers)

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Research

12 pages, 3366 KiB  
Article
Development from Alloys to Nanocomposite for an Enhanced Mechanical and Ignition Response in Magnesium
by Khin Sandar Tun, Tan Yan Shen Brendan, Sravya Tekumalla and Manoj Gupta
Metals 2021, 11(11), 1792; https://doi.org/10.3390/met11111792 - 08 Nov 2021
Cited by 4 | Viewed by 1722
Abstract
The current study reports on the evolution of microstructure, variations in compressive properties and the ignition resistance of Mg through compositional variation, using alloying elements and nanoreinforcement. The alloys were designed with the use of a singular alloying element, Ca, and a binary [...] Read more.
The current study reports on the evolution of microstructure, variations in compressive properties and the ignition resistance of Mg through compositional variation, using alloying elements and nanoreinforcement. The alloys were designed with the use of a singular alloying element, Ca, and a binary alloying element, Ca+Sc, to develop Mg1Ca (wt.%) and Mg1Ca1Sc (wt.%) alloys. B4C nanoparticles were addedas the reinforcement phase in the Mg1Ca1Sc alloy to create the Mg1Ca1Sc/1.5B4C (wt.%) nanocomposite. The most effective compressive properties and level of ignition resistance was displayed by the developed composite. The grain sizes were significantly reduced in the Mg alloys (81%) and the composite (92%), compared with that of the Mg. Overall, the microstructural features (i.e., grain refinement, the formation of favorable intermetallic compounds, and hard reinforcement particles with an adequate distribution pattern) enhanced both the compressive strength and strain of the alloys and the composite. The ignition resistance was progressively increased from the alloys to the nanocomposite, and a peak ignition temperature of 752 °C was achieved in the composite. When compared with the ignition resistant of Elektron 21 (E21) alloy, which met the Federal Aviation Administration (FAA) requirements, the Mg1Ca1Sc/1.5B4C nanocomposite showed a higher specific yield strength and better ignition resistance, asserting it as a potential candidate material for lightweight engineering applications, including aerospace and defense sectors. Full article
(This article belongs to the Special Issue Ceramic Reinforced Metal Matrix Nanocomposites)
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9 pages, 2406 KiB  
Article
Fabrication and Characterization of the Modified EV31-Based Metal Matrix Nanocomposites
by Seyed Kiomars Moheimani, Mehran Dadkhah, Mohammad Hossein Mosallanejad and Abdollah Saboori
Metals 2021, 11(1), 125; https://doi.org/10.3390/met11010125 - 10 Jan 2021
Cited by 7 | Viewed by 1750
Abstract
Metal matrix nanocomposites (MMNCs) with high specific strength have been of interest for numerous researchers. In the current study, Mg matrix nanocomposites reinforced with AlN nanoparticles were produced using the mechanical stirring-assisted casting method. Microstructure, hardness, physical, thermal and electrical properties of the [...] Read more.
Metal matrix nanocomposites (MMNCs) with high specific strength have been of interest for numerous researchers. In the current study, Mg matrix nanocomposites reinforced with AlN nanoparticles were produced using the mechanical stirring-assisted casting method. Microstructure, hardness, physical, thermal and electrical properties of the produced composites were characterized in this work. According to the microstructural evaluations, the ceramic nanoparticles were uniformly dispersed within the matrix by applying a mechanical stirring. At higher AlN contents, however, some agglomerates were observed as a consequence of a particle-pushing mechanism during the solidification. Microhardness results showed a slight improvement in the mechanical strength of the nanocomposites following the addition of AlN nanoparticles. Interestingly, nanocomposite samples were featured with higher electrical and thermal conductivities, which can be attributed to the structural effect of nanoparticles within the matrix. Moreover, thermal expansion analysis of the nanocomposites indicated that the presence of nanoparticles lowered the Coefficient of Thermal Expansion (CTE) in the case of nanocomposites. All in all, this combination of properties, including high mechanical strength, thermal and electrical conductivity, together with low CTE, make these new nanocomposites very promising materials for electro packaging applications. Full article
(This article belongs to the Special Issue Ceramic Reinforced Metal Matrix Nanocomposites)
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