Toughening of silicon nitride ceramics by addition of multilayer graphene

Bódis, Eszter; Cora, Ildikó; Németh, Péter; Tapasztó, Orsolya; Mohai, M.; Tóth, S.; Károly, Zoltán; Szépvölgyi, János

doi:10.1016/j.ceramint.2018.11.176

Cited by 26 publications

(17 citation statements)

References 25 publications

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“…Mu et al [ 8 ] investigated the relationship between interfacial strength and strengthening efficiency based on the shear-lag model, and they found that the high interfacial strength improved strengthening efficiency and enhanced the strength of multilayer graphene (MLG)/Ti composites. However, the weak bonding interface can promote graphene pull-out from the matrix, consequently leading to a significant improvement in fracture toughness [ 9 ]. Cheng et al [ 10 ] introduced weak interfaces into ZrB 2 –SiC matrix composite ceramics by incorporating graphene, and they found that the interfaces could induce multiple toughening mechanisms including crack deflection, microcracks, graphene bridging and pull-out.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

et al. 2021

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The interfacial structures and interfacial bonding characteristics between graphene and matrix in graphene-reinforced Al2O3–WC matrix ceramic composite prepared by two-step hot pressing sintering were systematically investigated. Three interfacial structures including graphene–Al2O3, graphene–Al2OC and graphene-WC were determined in the Al2O3–WC–TiC–graphene composite by TEM. The interfacial adhesion energy and interfacial shear strength were calculated by first principles, and it has been found that the interfacial adhesion energy and interfacial shear strength of the graphene–Al2OC interface (0.287 eV/nm2, 59.32 MPa) were far lower than those of graphene–Al2O3 (0.967 eV/nm2, 395.77 MPa) and graphene–WC (0.781 eV/nm2, 229.84 MPa) interfaces. Thus, the composite with the strong and weak hybrid interfaces was successfully obtained, which was further confirmed by the microstructural analysis. This interfacial structure could induce strengthening mechanisms such as load transfer, grain refinement, etc., and toughening mechanisms such as crack bridging, graphene pull-out, etc., which effectively improved mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

et al. 2021

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“…Tapasztó et al [16] have also reported a lower fracture toughness (~5.1 MPa•m 1/2 ) and Vickers hardness (~17.5 GPa) for the spark plasma sintered Si 3 N 4 with 6 wt% Al 2 O 3 + 4 wt% Y 2 O 3 than that of the present study. Moreover, Bodis et al [25] have studied the spark plasma sintering of Si 3 N 4 with 4 wt% Al 2 O 3 + 6 wt% Y 2 O 3 . The reported results of Vickers hardness and fracture toughness were ~18.3 GPa and ~6.3 MPa•m 1/2 , respectively.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Graphene-based materials have been widely utilized in different ceramic systems to improve fracture toughness [23][24][25][26][27][28][29][30][31][32], tribological properties [33][34][35], oxidation resistance [30,31,36], and biocompatibility [37][38][39]. Furthermore, several studies [23,25,27,32,-40-42] have been carried out to produce graphenereinforced Si 3 N 4 based ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…Ramirez et al [23] have reported a fracture toughness of ~6.6 MPa•m 1/2 for highly densified (~99%) Si 3 N 4 -based composite with the addition of 4.3 vol% GNPs. Bodis et al [25] have observed poor densification with the addition of MLG (multilayer graphene) into Si 3 N 4 . The authors reported a high fracture toughness of ~8.2 MPa•m 1/2 for the sample with 1 vol% MLG, but the density of this sample was only ~95%.…”

Section: Introductionmentioning

confidence: 99%

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Phase analysis, mechanical properties and in vitro bioactivity of graphene nanoplatelet-reinforced silicon nitride-calcium phosphate composites

Bozkurt

Akarsu

Akin

et al. 2021

Journal of Asian Ceramic Societies

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The aim of this study is to produce highly dense Si 3 N 4 based composites with good mechanical properties and bioactivity. Si 3 N 4 ceramics without using sintering aids, Si 3 N 4-HA and Si 3 N 4-HA-GNP based composites have been produced by spark plasma sintering (SPS) at temperatures of 1525-1550°C. The effect of reinforcement type and content on the densification behavior, phase analysis, microstructural development, mechanical properties, and in-vitro bioactivity behavior of Si 3 N 4 were systematically investigated. Monolithic Si 3 N 4 that contains a high amount of β-Si 3 N 4 phase (~87 wt%) was produced by nearly full densification (~99%). Hydroxyapatite (HA) was used as a starting powder during the preparation of binary and triple composites to provide bioactivity to Si 3 N 4 , and after sintering, HA transformed into tricalcium phosphate (β-TCP and α-TCP) polymorphs. The incorporation of GNPs had a positive effect on the stability of β-TCP phases at higher sintering temperatures. The improvement in indentation fracture toughness of the samples with GNP reinforcement was mainly attributable to pull-out and crack deflection mechanisms. In-vitro bioactivity of GNP added composites enhanced with increasing α-TCP content. More calcium phosphate-based particle formation was observed in Si 3 N 4-HA-GNP composites compared to the Si 3 N 4-HA.

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“…Porous silicon nitride (Si 3 N 4 ) ceramics are the promising engineering materials for many applications such as hot gas filter, catalyst carriers, membrane supports, biomaterials and etc, 1‐3 due to their unique combination of excellent mechanical strength, great oxidation and corrosion resistance, low thermal expansion coefficient and so forth 4‐6 . Several processing methods can be used to obtain porous Si 3 N 4 ceramics, including extrusion, reaction bonding, foaming, adding pore‐forming agent, freeze‐casting and so on 7‐9 .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and gas permeation performance of porous silicon nitride ceramics with unidirectionally aligned channels

Yao

Zuo

et al. 2020

J Am Ceram Soc

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Porous Si3N4 ceramics with unidirectionally aligned channels were prepared via freezing ceramics suspension with distinct solid contents under different freezing temperatures. The samples obtained using lower solid content in ceramic suspension at higher freezing temperature exhibit larger Darcian and non‐Darcian constants due to their higher open porosity, larger pore size and lower tortuosity. Moreover the investigation on individual contributions of viscous energy losses and inertial energy losses on the total pressure drop during permeation process indicates that with decreasing the solid content or the freezing temperature the viscous energy losses increase but the inertial energy losses decrease for samples owing to the differences in their pore structures. It is worth mentioning that porous Si3N4 ceramics with unidirectionally aligned channels exhibit larger Darcian and non‐Darcian constants than those with similar pore size distributions and open porosity owing to their lower tortuosity, thus rendering them appropriate for filters and membrane supports.

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Toughening of silicon nitride ceramics by addition of multilayer graphene

Cited by 26 publications

References 25 publications

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

Phase analysis, mechanical properties and in vitro bioactivity of graphene nanoplatelet-reinforced silicon nitride-calcium phosphate composites

Microstructure and gas permeation performance of porous silicon nitride ceramics with unidirectionally aligned channels

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