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Carbon Compounds-Reinforced Ceramics

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced and Functional Ceramics and Glasses".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 4831

Special Issue Editor


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Guest Editor
Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Sevilla, Avenida de Reina Mercedes s/n, E-41012 Sevilla, Spain
Interests: tribology; mechanical properties; ceramics; composite materials

Special Issue Information

Dear Colleagues,

Carbon compound-reinforced ceramics have emerged as one of the most promising materials that can effectively overcome the issue of the brittleness of ceramics, allowing for the development of reliable structural components for application in energy, automotive, aerospace, or medical industries.

Carbon-based nanomaterials, such as carbon nanotubes or graphene, are being used as reinforcements for ceramic matrices due to their small size, high aspect ratio, and exceptional mechanical properties. Their incorporation into different ceramic matrices, such as Al2O3, Si3N4, or ZrO2, have led to an improvement in mechanical behavior, with stronger, tougher materials obtained. Such behavior positively affects other related properties, such as wear resistance or biocompatibility which, in turn, determine their extensive industrial utilization. Diverse toughening mechanisms, such as crack bridging, crack deflection, crack pinning, or crack deflection, have being proposed. All of these mechanisms critically depend on phase distribution within the matrix and, consequently, processing and fabrication techniques have become essential stage when designing such materials.

In this Special Issue, research papers focused on carbon compound-reinforced ceramics, especially those that analyze new approaches to processing and fabrication of composite materials with improved mechanical properties, toughening mechanisms related to the interaction of crack propagation with carbon phases, and other properties directly related to fracture toughness such as wear resistance, thermal degradation, or thermal shock resistance, either using experimental or a modeling approaches.

I am pleased to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Felipe Gutiérrez-Mora
Guest Editor

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Keywords

  • carbon-reinforced ceramics
  • carbon nanotubes
  • graphene
  • carbon nanofibers
  • fracture toughness
  • toughening mechanisms
  • wear resistance
  • thermal degradation

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Published Papers (2 papers)

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Research

11 pages, 14636 KiB  
Article
Critical Influence of the Processing Route on the Mechanical Properties of Zirconia Composites with Graphene Nanoplatelets
by Ángela Gallardo-López, Carmen Muñoz-Ferreiro, Cristina López-Pernía, Emilio Jiménez-Piqué, Felipe Gutiérrez-Mora, Ana Morales-Rodríguez and Rosalía Poyato
Materials 2021, 14(1), 108; https://doi.org/10.3390/ma14010108 - 29 Dec 2020
Cited by 6 | Viewed by 2336
Abstract
Graphene-based nanostructures, used as potential reinforcement in ceramic composites, have a great tendency to agglomerate. This requires the use of homogenization techniques during the powder processing, posing the need to evaluate how these techniques affect the microstructure and the mechanical properties of the [...] Read more.
Graphene-based nanostructures, used as potential reinforcement in ceramic composites, have a great tendency to agglomerate. This requires the use of homogenization techniques during the powder processing, posing the need to evaluate how these techniques affect the microstructure and the mechanical properties of the resulting composites. The influence of the processing route on the properties of 3YTZP (3 mol % yttria tetragonal zirconia polycrystals) ceramic composites with 10 vol % cost-effective GNP (graphene nanoplatelets) has been addressed. Four different powder processing routines combining ultrasonic powder agitation (UA) and planetary ball milling (PBM) in wet and dry media have been used and all the composites were densified by spark plasma sintering (SPS). The mechanical properties at room temperature in the macroscale have been assessed by Vickers indentations, four-point bending tests and the impulse-echo technique, while instrumented indentation was used to measure the hardness and Young’s modulus at the nanoscale. The application of dry-PBM enhances greatly the mechanical and electrical isotropy of the composites, slightly increases the hardness and lowers the elastic modulus, independently of the application of UA. The combination of UA and dry-PBM enhances the flexure strength by 50%, which is desirable for structural applications. Full article
(This article belongs to the Special Issue Carbon Compounds-Reinforced Ceramics)
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9 pages, 3405 KiB  
Article
Effect of Additive Ti3SiC2 Content on the Mechanical Properties of B4C–TiB2 Composites Ceramics Sintered by Spark Plasma Sintering
by Xingheng Yan, Xingui Zhou and Honglei Wang
Materials 2020, 13(20), 4616; https://doi.org/10.3390/ma13204616 - 16 Oct 2020
Cited by 7 | Viewed by 2032
Abstract
B4C–TiB2 composite ceramics with ultra-high fracture toughness were successfully prepared via spark plasma sintering (SPS) at 1900 °C using B4C and Ti3SiC2 as raw materials. The results showed that compared with pure B4C [...] Read more.
B4C–TiB2 composite ceramics with ultra-high fracture toughness were successfully prepared via spark plasma sintering (SPS) at 1900 °C using B4C and Ti3SiC2 as raw materials. The results showed that compared with pure B4C ceramics sintered by SPS, the hardness of B4C–TiB2 composite ceramics was decreased, but the flexural strength and fracture toughness were significantly improved; the fracture toughness especially was greatly improved. When the content of Ti3SiC2 was 30 vol.%, the B4C–TiB2 composite ceramic had the best comprehensive mechanical properties: hardness, bending strength and fracture toughness were 27.28 GPa, 405.11 MPa and 18.94 MPa·m1/2, respectively. The fracture mode of the B4C–TiB2 composite ceramics was a mixture of transgranular fracture and intergranular fracture. Two main reasons for the ultra-high fracture toughness were the existence of lamellar graphite at the grain boundary, and the formation of a three-dimensional interpenetrating network covering the whole composite. Full article
(This article belongs to the Special Issue Carbon Compounds-Reinforced Ceramics)
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