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J. Compos. Sci.
Special Issues
Progress in Si-based Ceramic and Composites
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Progress in Si-based Ceramic and Composites

A special issue of Journal of Composites Science (ISSN 2504-477X).

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 16438

Special Issue Editor

Dr. Niranjan Patra

E-Mail Website
Guest Editor
Department of Engineering Chemistry, Koneru Lakshmaiah Education Foundation (KL University, Deemed), Greenfield, Vaddeswaram, AP, India
Interests: structural ceramics; polymer-derived ceramics and composites; 3D printing; nanocomposites; additives and compounding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Silicon-based ceramics have become indispensable in many fields, from industrial automotive to aerospace to biomedical engineering. This progress is due to the 40 years of continious research and developments of these high-performance materials. New information on processing parameters in different techniques as well as the microstructure–property relationship has lead to substantial improvements in performance and reliability for end-use aerospace structural, automotive, and functional applications, with lower cost.

This Special Issue aims at addressing the recent developments in Si-based ceramic and composites. Si-based ceramics synthesis/processing, physicochemical properties, as well as current and prospective potential applications will be addressed.

I would like to encourage the scientific community working in this area to contribute actively in the form of full articles, short communications, and reviews to this Special Issue. The topics to be addressed are, e.g.,

  • Synthesis/processing of Si-based ceramics and composites;
  • Polymer derived Si-based ceramics and its composites
  • Additives and compounding of feedstocks;
  • Sintering (conventional, spark plasma sintering, and pressure and magnetic field-assisted);
  • Shaping of components (conventional and additive manufacturing);
  • 3D printing (Si-based preceramics polymers and other methods);
  • Characterization (microstructure, mechanical, thermomechanical, and oxidation properties);
  • Applications of Si-based ceramics high-temperature structural applications.

Dr. Niranjan Patra
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. Journal of Composites Science 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 1800 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

  • Oxide and non-oxide Si-based ceramics
  • Ceramics manufacturing/processing
  • Silicon-based composites
  • Functional silicon ceramics
  • 3D printing
  • Microstructure
  • Mechanical properties
  • Thermal properties
  • Sintering
  • Machining
  • Shaping

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Published Papers (3 papers)

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Research

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19 pages, 23586 KiB  
Article
Effect of Hydrogels Containing Nanosilica on the Properties of Cement Pastes
by Babak Vafaei, Khashayar Farzanian and Ali Ghahremaninezhad
J. Compos. Sci. 2021, 5(4), 105; https://doi.org/10.3390/jcs5040105 - 12 Apr 2021
Cited by 17 | Viewed by 2871
Abstract
The effect of hydrogels containing nanosilica (NSi) on the autogenous shrinkage, mechanical strength, and electrical resistivity of cement pastes was studied. The interaction between the hydrogels and the surrounding cementitious matrix was examined using thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and [...] Read more.
The effect of hydrogels containing nanosilica (NSi) on the autogenous shrinkage, mechanical strength, and electrical resistivity of cement pastes was studied. The interaction between the hydrogels and the surrounding cementitious matrix was examined using thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The addition of hydrogels decreased autogenous shrinkage in the cement pastes and this reduction showed a dependence on the concentration of NSi in the hydrogels. Compressive strength and electrical resistivity were reduced in the cement pastes with hydrogels and this reduction was decreased with increased concentration of NSi in the hydrogel. A change in the phase composition of the cement paste in the region close to the hydrogel was noted, compared to the region away from the hydrogel. In a lime solution with increased pH and temperature, Ca(OH)2 and CaCO3 were found to form within the hydrogels; evidence of calcium-silicate-hydrate (C-S-H) formation in the hydrogels with NSi was obtained, indicating the possible pozzolanic potential of the hydrogels with NSi. Full article
(This article belongs to the Special Issue Progress in Si-based Ceramic and Composites)
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19 pages, 12347 KiB  
Article
Influence of SiC Addition on Mechanical Behavior of Thermal Barriers with the Aid of Acoustic Emission
by David Jeronimo Busquets, Carlos Bloem, Amparo Borrell and Maria Dolores Salvador
J. Compos. Sci. 2021, 5(1), 16; https://doi.org/10.3390/jcs5010016 - 7 Jan 2021
Viewed by 3077
Abstract
The improvement of high temperature materials with lower heat transfer coefficients lead to the development of thermal barrier coatings (TBCs). One of the most widely used materials for thermal barrier coatings is Y2O3 stabilized ZrO2 (Y-TZP) because of its [...] Read more.
The improvement of high temperature materials with lower heat transfer coefficients lead to the development of thermal barrier coatings (TBCs). One of the most widely used materials for thermal barrier coatings is Y2O3 stabilized ZrO2 (Y-TZP) because of its excellent shock resistance, low thermal conductivity, and relatively high coefficient of thermal expansion. The aim of this work is to study the TBCs mechanical behavior with the addition of SiC into the suspension of Y-TZP/Al2O3 by acoustic emission (AE). Additionally, a microstructural analysis and a finite elements model were carried out in order to compare results. The coatings were made by suspension plasma spray (SPS) on metal plates of 70 × 12 × 2 mm3. An intermetallic was deposited as a bond coating, followed by a coating of Y-TZP/Al2O3 with and without 15 wt.% SiC, with thicknesses between 87 and 161 μm. The AE becomes a fundamental tool in the study of the mechanical behavior of thermal barriers. The use of wavelet transforms streamlines the study and analysis of recorded sound spectra. The crack generation arises at very low stress levels. Full article
(This article belongs to the Special Issue Progress in Si-based Ceramic and Composites)
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Review

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19 pages, 2163 KiB  
Review
A Brief Overview of Recent Progress in Porous Silica as Catalyst Supports
by Preeti S. Shinde, Pradnya S. Suryawanshi, Kanchan K. Patil, Vedika M. Belekar, Sandeep A. Sankpal, Sagar D. Delekar and Sushilkumar A. Jadhav
J. Compos. Sci. 2021, 5(3), 75; https://doi.org/10.3390/jcs5030075 - 6 Mar 2021
Cited by 85 | Viewed by 9731
Abstract
Porous silica particles have shown applications in various technological fields including their use as catalyst supports in heterogeneous catalysis. The mesoporous silica particles have ordered porosity, high surface area, and good chemical stability. These interesting structural or textural properties make porous silica an [...] Read more.
Porous silica particles have shown applications in various technological fields including their use as catalyst supports in heterogeneous catalysis. The mesoporous silica particles have ordered porosity, high surface area, and good chemical stability. These interesting structural or textural properties make porous silica an attractive material for use as catalyst supports in various heterogeneous catalysis reactions. The colloidal nature of the porous silica particles is highly useful in catalytic applications as it guarantees better mass transfer properties and uniform distribution of the various metal or metal oxide nanocatalysts in solution. The catalysts show high activity, low degree of metal leaching, and ease in recycling when supported or immobilized on porous silica-based materials. In this overview, we have pointed out the importance of porous silica as catalyst supports. A variety of chemical reactions catalyzed by different catalysts loaded or embedded in porous silica supports are studied. The latest reports from the literature about the use of porous silica-based materials as catalyst supports are listed and analyzed. The new and continued trends are discussed with examples. Full article
(This article belongs to the Special Issue Progress in Si-based Ceramic and Composites)
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