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Nanomaterials
Special Issues
Graphene and Carbon Nanotube Ceramic Matrix Composites
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Graphene and Carbon Nanotube Ceramic Matrix Composites

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "2D and Carbon Nanomaterials".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 2608

Special Issue Editors

Dr. Katalin Balázsi

E-Mail Website
Guest Editor
Centre for Energy Research ELKH, Konkoly Thege Str. 29-33, Budapest, Hungary
Interests: bioceramic; thin films; TEM; ceramic composite
Special Issues, Collections and Topics in MDPI journals
Dr. Csaba Balázsi

E-Mail Website
Guest Editor
Centre for Energy Research ELKH, Konkoly Thege Str. 29-33, Budapest, Hungary
Interests: bioceramics; biomaterials; ceramic dispersion-strengthened steels; ceramics and nanocomposites for high temperature and tribological applications; open-structured functional materials for sensorics; fibre polymers; composites and coatings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear colleagues,

Ceramics are known materials with a high hardness, strength and toughness, with possible applications in a wide range of temperatures and the addition of second-phase fillers or nanoparticles to ceramic matrices possibily resulting in novel properties of the final composites, which can be considered as improvements or added functionalities in comparison to the intrinsic properties of the starting matrix. Nowadays, in the case of nitride, carbide or oxide ceramics, one of the most used additional phases is carbon in various forms, e.g., carbon nanotubes, carbon black or graphene. Nano-scaled graphene platelets of several desired size ranges (e.g., length and width of approximately 0.05 to 10 microns and a thickness of approximately 1 to 10 nm) demonstrate exceptionally high thermal and electrical conductivity and an exceptional combination of mechanical properties, and because of these additions, the realized ceramic matrix composites (CMC) have properties of great potential for various structural and functional applications. In the development of CMCs with CNTs and graphene additions, the following topics are of special interest:

  • Characterization and optimisation of mechanical, tribological, thermal and electrical properties, as well as the optimization of process procedures;
  • Modelling of material behaviour to understand it and identify possibilities for further optimization;
  • Evaluation of functional properties with respect to possible applications, e.g., integrity sensors, ceramics for low-cost manufacture electrical discharge machining, contacts, switches and electrical conductive ceramic parts.

In this Special Issue, papers dealing with preparation routes, colloidal mixing, milling and dispersing, followed by sintering, e.g., hot pressing, hot isostatic pressing, spark plasma sintering and flash sintering, as well as destructive or non-destructive characterization techniques related to the mechanical, electrical, thermal and tribological properties, together with ab initio or molecular dynamics modeling focusing on different defense, automotive, medical or space application areas of CMCs will be considered.

Dr. Katalin Balázsi
Dr. Csaba Balázsi
Guest Editors

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. Nanomaterials is an international peer-reviewed open access semimonthly 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 2900 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

  • advanced powder processing
  • characterization of ceramic/CNT and graphene interfaces
  • porous ceramic/CNTs and graphene composites
  • design of CMCs with CNTs and graphene
  • ceramics and ceramic/CNTs and graphene for renewable and nuclear energy
  • ceramics and ceramic/CNTs and graphene for bio-applications
  • multifunctional CNTs and graphene coatings for structural, energy and environmental applications
  • additive manufacturing and 3D printing technologies

Published Papers (2 papers)

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Research

13 pages, 4014 KiB  
Article
Doping Effects of Carbon Nanotubes and Graphene on the Flexural Properties and Tribological Performance of Needle-Punched Carbon/Carbon Composites Prepared by Liquid-Phase Impregnation
by Kuo-Jung Lee, Mu-Chou Lee, Yung-Hui Shih and Hsun-Yu Lin
Nanomaterials 2023, 13(19), 2686; https://doi.org/10.3390/nano13192686 - 30 Sep 2023
Viewed by 650
Abstract
The main goal of this study is to investigate the doping effects of carbon nanotubes (CNTs) and graphene on the needle-punched carbon/carbon (C/C) composites that are prepared by liquid-phase impregnation. In order to achieve, for the C/C composites, the purposes of high flexural [...] Read more.
The main goal of this study is to investigate the doping effects of carbon nanotubes (CNTs) and graphene on the needle-punched carbon/carbon (C/C) composites that are prepared by liquid-phase impregnation. In order to achieve, for the C/C composites, the purposes of high flexural strength, stable friction coefficient, low weight loss, and high thermal conductivity, our primary concern is to examine the flexural properties and the tribological performance, and then to explore a little further into the influence on thermal conductivity. In this study, carbon fiber preforms were first fabricated by needle-punched carbon-fiber cloth, and then liquid-phase phenolic resin, doped with different proportions of carbon nanotubes and graphene, was used as the impregnation solution to carry out multiple densification (impregnation–carbonization) cycles and fabricate various C/C composites. The main purpose was to probe into the doping effects of the CNTs and graphene, added to the impregnation solution, on the properties of C/C composites. The experimental results show that the addition of CNTs and graphene can improve the heat conductivity, flexural properties, and tribological performance of C/C composites, and the impact on these properties is more significant with the addition. Furthermore, the properties of graphene-doped C/C specimens are better than those of CNT-doped C/C specimens. Full article
(This article belongs to the Special Issue Graphene and Carbon Nanotube Ceramic Matrix Composites)
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19 pages, 10924 KiB  
Article
Preparation and Characterization of Fibrous Alumina and Zirconia Toughened Alumina Ceramics with Gradient Porosity
by Eszter Bódis, Kolos Molnár, János Móczó and Zoltán Károly
Nanomaterials 2022, 12(23), 4165; https://doi.org/10.3390/nano12234165 - 24 Nov 2022
Cited by 2 | Viewed by 1343
Abstract
This paper investigated a synthesis process for highly porous Al2O3, Y-ZTA, and Ce-ZTA ceramic nanocomposites with gradient microstructure and improved mechanical properties. Ceramic nanofibres were synthesized as the starting material. The gradient microstructure was developed during spark plasma sintering [...] Read more.
This paper investigated a synthesis process for highly porous Al2O3, Y-ZTA, and Ce-ZTA ceramic nanocomposites with gradient microstructure and improved mechanical properties. Ceramic nanofibres were synthesized as the starting material. The gradient microstructure was developed during spark plasma sintering using an asymmetric graphite arrangement that generated significant temperature differences (80–100 °C) between the opposite sides of the samples. Structural and mechanical properties of the fibrous ceramic composites were investigated. The effect of the temperature gradient on properties was also discussed. While the asymmetric configuration resulted in a gradient porosity, reference samples fabricated in standard graphite configuration were uniformly porous. The gradient structure and the ZrO2 addition led to improved hardness and compression strength of the sintered samples. However, the opposite sides of the samples exhibited considerable variations in both microstructure and in terms of properties. The upper part of the Ce-ZTA ceramic showed a highly porous structure with 18.2 GPa hardness, while the opposite side was highly densified with 23.0 GPa hardness. Compressive strength was 46.1 MPa and 52.1 MPa for Y-ZTA and Ce-ZTA sintered at 1300 °C, respectively, despite their high porosity. The research provided a promising approach to prepare highly porous ZTA composites with high strength for a wide range of applications. Full article
(This article belongs to the Special Issue Graphene and Carbon Nanotube Ceramic Matrix Composites)
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