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Ceramics
Special Issues
High-Temperature Ceramics
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High-Temperature Ceramics

A special issue of Ceramics (ISSN 2571-6131).

Deadline for manuscript submissions: closed (31 May 2020) | Viewed by 16505

Special Issue Editors

Prof. Dr. Diego Gomez-Garcia

E-Mail Website
Guest Editor
Condensed Matter Physics, Universidad de Sevilla, 41012 Sevilla, Spain
Interests: high-temperature ceramics; plasticity; dislocation dynamics; phase-field modelling of sintering
Special Issues, Collections and Topics in MDPI journals
Dr. Bibi Malmal Moshtaghioun

E-Mail Website
Guest Editor
Institute of Materials Science of Aragon, ICMA, Universidad de Zaragoza, Zaragoza, Spain
Interests: high-temperature refractories; boron carbide; spark plasma sintering; eutectics; optical properties of ceramics; nanoindentation

Special Issue Information

Dear Colleagues,

The world of ceramics is rich in diversity and unexpected new properties. This is particularly clear regarding mechanical properties if we consider, though not exclusively, the new carbides, nitrides, and borides which are available today. Astonishing optical, electrical or magnetic properties can also be measured in ceramics operating at high temperatures. This issue is devoted to any contribution reporting original research on physical properties of advanced ceramics at high temperatures. Experimental and theoretical contributions are very welcome, particularly those connecting both experimental analysis and a theoretical explanation of them. Papers describing new experimental techniques are also considered.

Dr. Diego Gomez-Garcia
Dr. Bibi Malmal Moshtaghioun
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. Ceramics is an international peer-reviewed open access quarterly 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 1600 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

  • High-temperature plasticity: experimental and modeling
  • Multiscale modeling of physical properties
  • Microstructural and mechanical characterization of advanced ceramics
  • Carbides, borides, and nitrides
  • Eutectics ceramics
  • Advanced techniques for sintering of advanced ceramics

Published Papers (4 papers)

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Research

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14 pages, 7195 KiB  
Article
Structural Design of 5 mol.% Yttria Partially Stabilized Zirconia (5Y-PSZ) by Addition of Manganese Oxide and Direct Firing
by Alejandro Natoli, Aleksey Yaremchenko and Jorge R. Frade
Ceramics 2020, 3(3), 345-358; https://doi.org/10.3390/ceramics3030031 - 9 Sep 2020
Cited by 2 | Viewed by 2995
Abstract
In this study, 5Y-PSZ-based ceramics with 15 mol.% of manganese oxide were obtained from PSZ + MnO2 powders mixtures by pressing and direct firing. The resulting materials show a stable cubic fluorite structure with only minor traces of segregated manganese oxides and [...] Read more.
In this study, 5Y-PSZ-based ceramics with 15 mol.% of manganese oxide were obtained from PSZ + MnO2 powders mixtures by pressing and direct firing. The resulting materials show a stable cubic fluorite structure with only minor traces of segregated manganese oxides and relative density from 90% to 98%. The linear thermal expansion coefficient is in the order of 10−5 K−1 at 500 K and increases gradually with temperature, due to the onset of a contribution of chemical expansion, reaching about 13 × 10−6 K−1 at 1100 K. These results are suitable for prospective applicability as buffer layers to minimize degradation and delamination of electrolyte/oxygen electrode interfaces in solid electrolyte cells. The electrical conductivity remains close to 1 S/m at 973 K and close to 7 S/m at 1273 K, suggesting mixed conductivity with a prospective contribution to electrode processes occurring at electrode/electrolyte interfaces. Guidelines for further improvement were also established by a detailed analysis of the impact of heating/cooling rate, firing temperature, and time on those properties, based on Taguchi planning. Full article
(This article belongs to the Special Issue High-Temperature Ceramics)
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6 pages, 1626 KiB  
Article
Synthesis of Titanium Carbide by Means of Pressureless Sintering
by Tatiana Kvashina, Nikolai Uvarov and Arina Ukhina
Ceramics 2020, 3(3), 306-311; https://doi.org/10.3390/ceramics3030028 - 18 Aug 2020
Cited by 7 | Viewed by 2844
Abstract
In this study, titanium carbide was obtained by low-temperature pressureless (at pressure less than 1 MPa) sintering of a mixture of elementary titanium and graphite powders in a hot-pressing plant with a preliminary mechanical treatment of the initial mixture. The sintering was carried [...] Read more.
In this study, titanium carbide was obtained by low-temperature pressureless (at pressure less than 1 MPa) sintering of a mixture of elementary titanium and graphite powders in a hot-pressing plant with a preliminary mechanical treatment of the initial mixture. The sintering was carried out at temperatures of 900 and 1000 °C in argon media. As a result, cubic modification (Fm3m) of titanium carbide was obtained. The content of impurities was about 12–13 wt.% Full article
(This article belongs to the Special Issue High-Temperature Ceramics)
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9 pages, 4949 KiB  
Communication
Amorphization Mitigation in Boron-Rich Boron Carbides Quantified by Raman Spectroscopy
by Mark C. Schaefer and Richard A. Haber
Ceramics 2020, 3(3), 297-305; https://doi.org/10.3390/ceramics3030027 - 23 Jul 2020
Cited by 14 | Viewed by 3947
Abstract
Boron carbide is an extremely hard and lightweight material used in armor systems. Upon impact above the Hugoniot elastic limit (HEL), boron carbide loses strength and suddenly fails. Atomistic models suggest that boron-rich boron carbides could mitigate amorphization. Such samples were processed, and [...] Read more.
Boron carbide is an extremely hard and lightweight material used in armor systems. Upon impact above the Hugoniot elastic limit (HEL), boron carbide loses strength and suddenly fails. Atomistic models suggest that boron-rich boron carbides could mitigate amorphization. Such samples were processed, and indentation-induced amorphous zones were created throughout the boron-rich samples of varying degrees and were mapped with Raman spectroscopy to assess changes in the amorphization intensity. Boron-rich samples with a B/C ratio of 6.3 showed a large reduction in amorphization intensity compared to commonly used stoichiometric B4 C, in agreement with recent TEM results. Additionally, hardness trends were also noted as boron content is varied. This offers another pathway in which doping boron carbide can reduce amorphization. Full article
(This article belongs to the Special Issue High-Temperature Ceramics)
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Review

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28 pages, 2202 KiB  
Review
Chemical Preparation Routes and Lowering the Sintering Temperature of Ceramics
by Philippe Colomban
Ceramics 2020, 3(3), 312-339; https://doi.org/10.3390/ceramics3030029 - 18 Aug 2020
Cited by 11 | Viewed by 6186
Abstract
Chemically and thermally stable ceramics are required for many applications. Many characteristics (electrochemical stability, high thermomechanical properties, etc.) directly or indirectly imply the use of refractory materials. Many devices require the association of different materials with variable melting/decomposition temperatures, which requires their co-firing [...] Read more.
Chemically and thermally stable ceramics are required for many applications. Many characteristics (electrochemical stability, high thermomechanical properties, etc.) directly or indirectly imply the use of refractory materials. Many devices require the association of different materials with variable melting/decomposition temperatures, which requires their co-firing at a common temperature, far from being the most efficient for materials prepared by conventional routes (materials having the stability lowest temperature determines the maximal firing temperature). We review here the different strategies that can be implemented to lower the sintering temperature by means of chemical preparation routes of oxides, (oxy)carbides, and (oxy)nitrides: wet chemical and sol–gel process, metal-organic precursors, control of heterogeneity and composition, transient liquid phase at the grain boundaries, microwave sintering, etc. Examples are chosen from fibers and ceramic matrix composites (CMCs), (opto-)ferroelectric, electrolytes and electrode materials for energy storage and production devices (beta alumina, ferrites, zirconia, ceria, zirconates, phosphates, and Na superionic conductor (NASICON)) which have specific requirements due to multivalent composition and non-stoichiometry. Full article
(This article belongs to the Special Issue High-Temperature Ceramics)
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