Special Issue "Production and Characteristics of Ceramic Matrix Composites with a Two-Dimensional Dispersed Phase"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 30 September 2020.

Special Issue Editor

Dr. Paweł Rutkowski
E-Mail Website
Guest Editor
AGH University of Science and Technology in Krakow, Faculty of Materials Science and Ceramics, Department of Ceramics and Refractories, Poland
Interests: manufacturing and properties examinations of transition metal carbides, nitrides, and borides; thermal properties of advanced hard ceramics; boron cabide-based materials; anisotropic ceramic materials containing 2D particles such as graphene and h-BN; laser processing of advanced ceramic material and MMC laser-produced materials; sintering of advanced ceramic material

Special Issue Information

Dear Colleagues,

There is a great interest in 2D particle addition to ceramic materials due to their specific anisotropic thermal and electrical properties, self-lubricative features, unique mechanical properties, and flexibility. This Special issue is focused on such two-dimensional particles as graphene, hexagonal boron nitride, molybdenium sulfide, etc. The 2D desired phases should be distributed in a composite matrix in the field of hard nitrides, borides and carbide, MAX phases, UHTC phases, oxynitrides, and oxides as well. From the experience and literature, the low concentration of 2D particles up to 2 wt.% can lead to mechanical properties’ improvement, but higher addition will cause anisotropy of material properties. This enables, for example, gradient material production, which on the one hand is mechanically enhanced, but the gradual anisotropic layer allows dissipating heat. In such composites, material microstructure, all of the properties, possibility of their materials application will at first depend on the starting raw materials, the preparation technique, and finally, the manufacturing way (pressureless sintering, HP, SPS, PPS, HIP, HP-HT). On the other hand, material behavior during the work will also depend on the final composite shaping methods. This last stage of CMC preparation will depend on fracture toughness, thermal shock resistance, heat transfer rate, and its direction and electrical properties as well.

Summarizing, this issue will accept papers concerning:

  • Raw materials and mixture preparation for densification process;
  • Sintering aids for final material manufacturing;
  • Various production processes of dense, uniformed, gradient, and controlled porosity materials;
  • Anisotropic properties of 2D ceramic matrix composites;
  • Wear and oxidation resistance of sinters;
  • Thermal and electrical properties;
  • Application test of 2D/ceramic composites;
  • 2D/ceramic composites shaping mechanical, electrical discharge machining, subtractive laser processing, and additive manufacturing;
  • High temperature ceramic filters;
  • Refractory materials containing 2D particles;
  • Thermal computer simulation of properties of 2D/ceramic composites.

Dr. Paweł Rutkowski
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 papers will be 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. Materials 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 2000 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

  • 2D particles
  • CMC
  • mechanical properties
  • thermal properties
  • electrical properties
  • anisotropic materials
  • shaping methods
  • 2D particles application
  • graphene, h-BN, GPLs, UHTC
  • transition metal ceramic
  • oxides matrix
  • oxynitrides
  • nitrides matrix
  • carbides matrix
  • borides matrix

Published Papers (1 paper)

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Research

Open AccessArticle
In Situ Spinel Formation in a Smart Nano-Structured Matrix for No-Cement Refractory Castables
Materials 2020, 13(6), 1403; https://doi.org/10.3390/ma13061403 - 19 Mar 2020
Abstract
The hydration of an equimolar mixture of MgO and Al2O3 nano-powders has been proven to be an effective way to synthesize Mg6Al2CO3(OH)16∙4H2O as a component of a nano-structured matrix and [...] Read more.
The hydration of an equimolar mixture of MgO and Al2O3 nano-powders has been proven to be an effective way to synthesize Mg6Al2CO3(OH)16∙4H2O as a component of a nano-structured matrix and magnesia-alumina spinel precursor for high-performance cement-free corundum-spinel refractory castables. (Mg3)–OH–brucite sites (417 °C) formed initially within the magnesia–alumina hydrating blended paste were replaced with (Mg2Al)–OH and (Mg3)–OH hydrotalcite sites, which were dehydroxylated at 420 °C and 322 °C, respectively. This reorganization was connected with the incorporation of anions and water molecules in the interlayer spacing of hydrotalcite, which was dehydrated at 234 °C. Hence, the thermal decomposition of a nano-structured matrix system containing mainly Mg6Al2CO3(OH)16∙4H2O consists of a complex sequence of dehydration, dehydroxylation and decarbonization, and this finally leads to the formation of inverse spinel MgAl2O4 and periclase MgO through many intermediate stages containing the mixed tetrahedral-octahedral Al phase and MgO-like structure. Hence, the hydraulic bond that primarily existed was replaced by a ceramic bond at a relatively low temperature, i.e., 700 °C, where a spinel was formed. Important changes in oxygen coordination polyhedra around Al3+ in the dehydrated-dehydroxylated hydrotalcite occurred between 600 and 1100 °C. Full article
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