Special Issue "Ceramic Technologies and Applications"

A special issue of Technologies (ISSN 2227-7080). This special issue belongs to the section "Innovations in Materials Processing".

Deadline for manuscript submissions: closed (30 April 2017)

Special Issue Editor

Guest Editor
Prof. Dr. Paolo Veronesi

DIMANT (Design of Innovative Materials for New Technologies), Department of Engineering "Enzo Ferrari", Via Vivarelli 10, 41125 Modena, Italy
Website | E-Mail
Interests: microwave processing of marterials; microwave applicator design; powder metallurgy; numerical simulation of electroheat processes; high entropy alloys; non ferrous alloys; heat treatment of metals

Special Issue Information

Dear Colleagues,

Despite their almost 30,000-year age, man-made ceramics still possess enormous technological breakthrough capabilities. Their unique structural and functional properties make ceramic materials candidates for thermally, mechanically, and chemically demanding applications. Application requirements are increasingly demanding when it comes to the design, manufacturing, reliability, and costs. Fields of applications range from biomedical to electronics, from high purity technical ceramics to more traditional ceramics. New processing routes, such as additive manufacturing or field-assisted sintering techniques, offer intriguing possibilities to produce new shapes or materials with peculiar properties. In this framework, this Special Issue aims to publish papers in the area of emerging ceramic technologies and applications, presenting new processing routes or innovative applications of ceramic materials. Particular attention should be given to the interplay between the processing conditions and the resulting material properties, and how these can be controlled. The Special Issue is dedicated to both ceramic materials and ceramic matrix composites.

Prof. Dr. Paolo Veronesi
Guest Editor

Manuscript Submission Information

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Keywords

  • raw materials preparation
  • drying
  • forming
  • sintering
  • melting
  • finishing
  • surface treatment and/or decoration
  • additive manufacturing
  • SPS
  • combustion synthesis
  • microwave and RF processing
  • ion beam and laser processing
  • Powder Injection Molding
  • sol-gel
  • Mechanical, electrical, optical, magnetic or thermal properties
  • alkali-activated
  • geopolymers
  • bioceramics
  • electroceramics
  • cellular materials
  • nanomaterials
  • ceramic matrix composites
  • ceramic coatings
  • green manufacturing
  • LCA

Published Papers (2 papers)

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Research

Open AccessArticle Finite Element Analysis of Self-Healing and Damage Processes in Alumina/SiC Composite Ceramics
Technologies 2017, 5(3), 40; doi:10.3390/technologies5030040
Received: 27 April 2017 / Revised: 6 June 2017 / Accepted: 20 June 2017 / Published: 23 June 2017
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Abstract
Among various ceramic matrix composites developed, self-healing ceramics have been studied as new functional materials. Self-healing occurs in such materials by high-temperature oxidation triggered by a micro-crack initiation on the surface, and the strength of the material autonomously recovers to its robust state
[...] Read more.
Among various ceramic matrix composites developed, self-healing ceramics have been studied as new functional materials. Self-healing occurs in such materials by high-temperature oxidation triggered by a micro-crack initiation on the surface, and the strength of the material autonomously recovers to its robust state since the micro-crack is re-bonded. To facilitate the use of self-healing ceramics in machines and equipment, a novel numerical simulation method based on finite element analysis (FEA) needs to be applied. In this study, we applied a previously proposed constitutive model to a series of self-healing and damage processes. In the constitutive model, the damage process is formulated on the basis of fracture mechanics, while the self-healing process is formulated on the basis of empirical oxidation kinetics. The FEA model implemented the constitutive model to simulate a series of experiments of the alumina/15 vol% SiC composites. The self-healing process was targeted to a prescribed damage by Vickers indentation. Thereafter, the self-healing behavior was quantitatively compared with that observed in the experiment. The results suggest that the proposed FEA approach can be applied to the analysis of ceramic matrix composites with self-healing properties. Full article
(This article belongs to the Special Issue Ceramic Technologies and Applications)
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Open AccessArticle Synthesis and Sintering of ZnO Nanopowders
Technologies 2017, 5(2), 28; doi:10.3390/technologies5020028
Received: 14 April 2017 / Revised: 16 May 2017 / Accepted: 22 May 2017 / Published: 30 May 2017
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Abstract
Nanopowders are continuously under investigation as they open new perspectives in numerous fields. There are two main challenges to stimulating their development: sufficient low-cost, high throughput synthesis methods which lead to a production with well-defined and reproducible properties; and for ceramics specifically, the
[...] Read more.
Nanopowders are continuously under investigation as they open new perspectives in numerous fields. There are two main challenges to stimulating their development: sufficient low-cost, high throughput synthesis methods which lead to a production with well-defined and reproducible properties; and for ceramics specifically, the conservation of the powders’ nanostructure after sintering. In this context, this paper presents the synthesis of a pure nanosized powder of ZnO (dv50~60 nm, easily redispersable) by using a continuous Segmented Flow Tubular Reactor (SFTR), which has previously shown its versatility and its robustness, ensuring a high powder quality and reproducibility over time. A higher scale of production can be achieved based on a “scale-out” concept by replicating the tubular reactors. The sinterability of ZnO nanopowders synthesized by the SFTR was studied, by natural sintering at 900 °C and 1100 °C, and Spark Plasma Sintering (SPS) at 900 °C. The performance of the synthesized nanopowder was compared to a commercial ZnO nanopowder of high quality. The samples obtained from the synthesized nanopowder could not be densified at low temperature by traditional sintering, whereas SPS led to a fully dense material after only 5 min at 900 °C, while also limiting the grain growth, thus leading to a nanostructured material. Full article
(This article belongs to the Special Issue Ceramic Technologies and Applications)
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Figure 1

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Microwave Assisted Synthesis of the CoAl2O4 Pigment
Authors: Paolo Veronesi, Federica Bondioli, Cristina Leonelli

Title: Chemical Strengthening of Industrial Glazes for Ceramic Tile
Authors: Silvia Barbi , Paola Miselli , Paolo Veronesi , Cristina Siligardi

Title: Finite element analysis of damage and self-healing process in alumina/SiC nanocomposite materials
Authors: Marika Nakamura 1, Kyohei Takeo 1, Toshio Osada 2 and Shingo Ozaki 1
Affiliation:

1          Yokohama National University, Japan

2          National Institute of Material Science, Japan


Abstract: Among of various ceramic matrix composites, self-healing ceramics have been developed and have been studied as new functional compounds (1), (2). To facilitate the use of self-healing ceramic materials in machines and equipment, a novel numerical simulation method, such as finite element analysis (FEA), has to be applied. Under such circumstances, the authors have developed the damage and self-healing constitutive model, and then, it was applied to typical FEA of self-healing alumina/SiC nanocomposite materials(3). To incorporate the effect of oxidation kinetics on strength recovery for self-healing ceramic materials, this model has introduced the evolution law of internal state variable based on the self-healing rate proposed by Osada et al(4). The formulation was verified through the investigation of the systematically obtained mechanical responses. The proposed model can describe not only the progress of damage, but also the self-healing phenomena using unified formulations. The obtained numerical results suggest that the proposed model can be applied to the analysis of ceramic matrix composites with self-healing properties and arbitrary deformation histories, including cyclic loading. In previous FEA, however, we focused on the simple fracture (damage) process and its healing. To apply self-healing ceramics to actual machines and equipment, a non-prescribed damage process, including Foreign Object Damage (FOD) should be considered. In addition, the quantitative validation of FEA is indispensable.

 

In this study, we apply the previously proposed constitutive model to a series of damage-healing-damage processes. Concretely, we demonstrate the FE analysis of indentation (damage) phase, self-healing phase, and 3-point bending (re-damage) phase. The numerical model is imitated a series of experiment of alumina/15 vol.% SiC nanocomposites (4). Then, the self-healing behavior is quantitatively compared with the experiment.

References:

(1) Nakao, W., Haga, Y., Japan Patent Kokai, (2010), 2010-290947.

(2) Osada, T., Nakao, W., Takahashi, K., Ando, K., Saito, S., J. Eur. Ceram. Soc., 27, (2007), 3261-3267.

(3) Ozaki, S., Osada, T., Nakao, W., Int. J. Solids Struct., 100-101, (2016), 307-318.

(4) Osada, T., Nakao, W., Takahashi, K., Ando, K., J. Am. Ceramic Society, 92, (2009), 864-869.

 

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