Toughened and strengthened silicon carbide ceramics by adding graphene-based fillers

Belmonte, Manuel; Nistal, Andrés; Boutbien, Pierre; Román-Manso, Benito; Osendi, M.I.; Miranzo, P.

doi:10.1016/j.scriptamat.2015.10.023

Cited by 96 publications

(44 citation statements)

References 17 publications

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“…In addition, the steadystate regime was reached at a longest distance for the smooth SiC plates. Moreover, matrix grain size and aspect ratio are very similar (0.6-0.7 m and 1.4, respectively) for the different materials [26]. Therefore, it can be inferred that the friction response is directly linked to the graphene additions with respect to the reference material during the running-in period, GNPs leading to an enhanced friction performance as compared to rGOs.…”

Section: Resultsmentioning

confidence: 80%

“…The more pronounced reduction in E and H for rGOs composites was expected considering the lower E value of rGO sheets as well as its higher waviness when compared to GNPs [32]. Interestingly, K IC considerably increased for any graphenebased composite, independently of the GNPs content or type of graphene source, when compared to SiC [26]. In this way, GNPs composites exhibited a maximum increment in K IC of 86% (10 GNPs composite) with respect to monolithic SiC; whereas rGOs induced an outstanding toughness enhancement (162%) with a K IC value of 8.3 ± 0.7 MPa m 1/2 (3.2 ± 0.4 MPa m 1/2 for SiC).…”

Section: Resultsmentioning

confidence: 91%

“…1a and the inset shows). In addition, matrix grain size and aspect ratio are very similar (0.6-0.7 m and 1.4, respectively) for the different materials [26]. Table 1 collects the mechanical properties of the different materials.…”

Section: Resultsmentioning

confidence: 93%

“…Besides, they contained ␤-SiC (3C polytype) as main crystalline phase, with a low intense X-ray diffraction signal associated to ␣-SiC phase (6H polytype) and YAlO 3 (YAP) or Y 3 Al 5 O 12 (YAG), the latter compounds formed by the reaction between the sintering additives [25,26]. Moreover, micro-Raman spectroscopy evidenced that GNPs remained undamaged after the SPS process, while GOs were effectively reduced to graphene (rGOs) during the SPS process [27].…”

Section: Resultsmentioning

confidence: 99%

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Tribological performance under dry sliding conditions of graphene/silicon carbide composites

Llorente

Román-Manso

Miranzo

et al. 2016

Journal of the European Ceramic Society

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110

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a b s t r a c tThe role played by graphene in the friction and wear behaviour of graphene/silicon carbide (SiC) composites, tested under dry sliding conditions and using silicon nitride balls as counterbodies, is investigated as a function of the graphene nanoplatelets (GNPs) content and the graphene source. GNPs composites show an enhanced wear resistance as compared to monolithic SiC, with maximum improvements of ∼70% for the material containing up to 20 vol.% of GNPs; whereas the friction performance depends on the sliding distance and GNPs content. The analysis of the wear debris by micro-Raman spectroscopy evidenced that the tribological behaviour of the GNPs/SiC materials is linked to the formation of an adhered lubricating and protecting tribofilm. Multilayered graphene fillers participate more actively in the protecting tribofilm than other graphene sources such as reduced graphene oxide or in-situ grown graphene flakes.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Tribological performance under dry sliding conditions of graphene/silicon carbide composites

Llorente

Román-Manso

Miranzo

et al. 2016

Journal of the European Ceramic Society

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110

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“…9b and c). Other authors have also reported [2e4, 8,19,24,29e33] crack-deflection and crack-bridging as toughening mechanisms. Interestingly, Walker et al [18] have reported a toughening mechanism where GPL wrapping and anchoring themselves around individual Si 3 N 4 grains show a resistance to pullout.…”

mentioning

confidence: 93%

Fast and easy preparation of few-layered-graphene/magnesia powders for strong, hard and electrically conducting composites

Weibel

Mesguich

Chevallier

et al. 2018

Carbon

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Christophe Fast and easy preparation of few-layered-graphene/magnesia powders for strong, hard and electrically conducting composites. (2018) a b s t r a c tComposite powders were prepared by the chemical vapor deposition (CH 4 /Ar atmosphere) of carbon in the form of 2e8 layers few-layered-graphene (FLG) covering the MgO powder grains, without any mixing step. The composites were consolidated to nearly full (99%) density by spark plasma sintering with no or little damage to the FLG. The FLG is located along the MgO grain boundaries, as opposed to be dispersed as discrete particles or flakes. This causes a dramatic hindrance of the MgO grain growth, the average grain size being considerably lower for the sample with 2.08 vol% carbon (200 nm) than for pure MgO (3.7 mm). The samples are investigated by Raman spectroscopy, scanning and transmission electron microscopy. The composites are electrically conducting with a percolation threshold below 0.56 vol%. Compared to pure MgO, the composites are simultaneously stronger (345 vs 200 MPa) and harder (9.8 vs 3.8 GPa). This could arise from reinforcement mechanisms such as crack-deflection and crack-bridging by FLG, but also from MgO grain refinement.

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Enhanced Mechanical Properties of Direct Ink Writing (3D Printed) Hexagonal Boron Nitride Reinforced Porous Boehmite Structures

Ambekar,

Joseph,

Ganji

et al. 2024

Adv Eng Mater

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3D printing techniques offer a unique opportunity to build unconventional shapes to enhance operational performance. Boehmite structures that are 3D printed using direct ink writing (DIW) technique are employed as catalytic carriers; however, their inadequate fracture resistance poses a drawback. Therefore, this study aims to improve the mechanical properties of 3D‐printed boehmite structures by reinforcing hexagonal boron nitride (hBN) nanosheets. Herein, the DIW of boehmite structures is reported where porosity and surface area relevant for industrial applications have been achieved. Since porosity enhancement is a trade‐off with mechanical strength, reinforcement of 3D printing boehmite ink is done with hBN in an effort to increase its fracture strength without compromising porosity. There are varied hBN concentrations in the composite to study its impact on the mechanical strength of 3D‐printed cylindrical structures tested under compression techniques. The as‐developed composite structure with 1% hBN reinforcement has excellent printability and better mechanical strength (19% compression strength enhancement compared to pure boehmite) without compromising functional properties such as thermal stability and surface area.

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Toughened and strengthened silicon carbide ceramics by adding graphene-based fillers

Cited by 96 publications

References 17 publications

Tribological performance under dry sliding conditions of graphene/silicon carbide composites

Tribological performance under dry sliding conditions of graphene/silicon carbide composites

Fast and easy preparation of few-layered-graphene/magnesia powders for strong, hard and electrically conducting composites

Enhanced Mechanical Properties of Direct Ink Writing (3D Printed) Hexagonal Boron Nitride Reinforced Porous Boehmite Structures

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