Comparative study on carbon nanotube- and reduced graphene oxide-reinforced alumina ceramic composites

Shin, Jung-Hoo; Choi, Jonghyun; Kim, Miyoung; Hong, Seong‐Hyeon

doi:10.1016/j.ceramint.2018.02.024

Cited by 43 publications

(19 citation statements)

References 66 publications

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“…However, the grain size won't decrease unceasingly as the content of CNT increases because the CNT concentration only increases at the grain boundary; however, this does not increase the number of pinned boundaries [45]. Shin et al found that the grain size of Al 2 O 3 decreases with the increase of the rGO amount, as long as they are uniformly dispersed in SWCNT-rGO-Al 2 O 3 composites [90]. Therefore, the number of pinned boundaries can be increased by promoting nanocarbon dispersion.…”

Section: Fine-grained Strengtheningmentioning

confidence: 99%

“…The second influencing factor is the geometric shape. rGO refines Al 2 O 3 grains better than does SWCNT because its geometric shape is more favourable for the grain boundary pinning effect [90]. Apart from the pinning effect, nanocarbon (graphene, GO, rGO) winding at grain boundaries can effectively inhibit grain growth and promote dispersion [2,104].…”

Section: Fine-grained Strengtheningmentioning

confidence: 99%

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Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Liu

Jiang

Shi

et al. 2020

Nanotechnology Reviews

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AbstractNanocarbon materials (carbon nanotubes, graphene, graphene oxide, reduced graphene oxide, etc.) are considered the ideal toughening phase of ceramic matrix composites because of their unique structures and excellent properties. The strengthening and toughening effect of nanocarbon is attributed to several factors, such as their dispersibility in the matrix, interfacial bonding state with the matrix, and structural alteration. In this paper, the development state of nanocarbon-toughened ceramic matrix composites is reviewed based on the preparation methods and basic properties of nanocarbon-reinforced ceramic matrix composites. The assessment is implemented in terms of the influence of the interface bonding condition on the basic properties of ceramic matrix composites and the methods used to improve the interface bonding. Furthermore, the strengthening and toughening mechanisms of nanocarbon-toughened ceramic matrix composites are considered. Moreover, the key problems and perspectives of research work relating to nanocarbon-toughened ceramic matrix composites are highlighted.

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Section: Fine-grained Strengtheningmentioning

confidence: 99%

Section: Fine-grained Strengtheningmentioning

confidence: 99%

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Liu

Jiang

Shi

et al. 2020

Nanotechnology Reviews

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“…The rGO was prepared by adding a mixture of graphite flake (Sigma-Aldrich) and KMnO 4 (Sigma-Aldrich) to a 9:1 mixture of sulfuric acid/phosphoric acid, as reported previously [23,24]. The as-synthesized GO was dispersed in a solution of dimethylformamide (450 ml) and deionized water (50 ml).…”

Section: Experimental Methodologymentioning

confidence: 99%

Suppressing spinodal decomposition by incorporation of reduced graphene oxide into (Sn_0.5Ti_0.5)O₂ solid solution

Choi

2020

Mater. Res. Express

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Here, it is found that the incorporation of rGO into (Sn 0.5 Ti 0.5 )O 2 solid solution suppresses spinodal decomposition via two characteristic routes. First, the addition of rGO to the solid solution leads to the compositional change from (Sn 0.5 Ti 0.5 )O 2 to (Sn 0.1 Ti 0.9 )O 2 moving out of the miscibility gap at SnO 2 -TiO 2 phase diagram, which suppresses spinodal decomposition. The results indicate that addition of rGO promotes reduction and evaporation of SnO 2 during heat treatment. Secondly, the incorporation of rGO is found to produce the solid solution with lower Sn and Ti valences and more oxygen vacancies, which can also suppress spinodal decomposition. OPEN ACCESS RECEIVED

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“…Carbon nanotubes have been identified by researchers as potential fillers in the reinforcement of ceramic matrices due to their intrinsically high thermal conductivity. The thermal conductivity values of SWCNTs and MWCNTs are 6000 and 3000 W/mK, respectively [18,176]. However, the addition of CNTs to alumina does not generate as high a thermal conductivity as expected based on the intrinsic thermal conductivity of CNTs.…”

Section: Thermal Properties Of Alumina-based Nanocompositesmentioning

confidence: 99%

“…The authors attributed this reduction in thermal conductivity to densification and microstructural refinement. Shin et al [176] also studied the influence of SWCNTs on the thermal conductivity of alumina and noted that the thermal conductivity of alumina decreased with SWCNT inclusion. This decrease in alumina with SWCNT addition was attributed to a decrease in sound speed because of the defect in SWCNTs during SPS processing that reduced the phonon mean free path.…”

Section: Thermal Properties Of Alumina-based Nanocompositesmentioning

confidence: 99%

Recent Advances in the Processing and Properties of Alumina–CNT/SiC Nanocomposites

2019

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An alumina-based nanocomposite is fabricated through the addition of secondary nanophase material to an alumina matrix to alter and tailor the properties of alumina. The addition to alumina of semi-conductive materials, such as silicon carbide (SiC), and high conductive materials, such as carbon nanotubes with a characteristic size in the nanometer range, can alter the mechanical strength, hardness, toughness, and electrical and thermal properties of alumina. This paper discusses recent advances in the synthesis of alumina–SiC and alumina-carbon nanotube (CNT) nanopowders and their consolidation using conventional and non-conventional techniques. Mechanical (hardness, fracture toughness and flexural strength) and functional (thermal and electrical) properties are discussed. The influence of the microstructure on the properties of alumina–SiC and alumina–CNT nanocomposites is discussed. Furthermore, potential applications and current related research trends are described.

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Comparative study on carbon nanotube- and reduced graphene oxide-reinforced alumina ceramic composites

Cited by 43 publications

References 66 publications

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Suppressing spinodal decomposition by incorporation of reduced graphene oxide into (Sn_0.5Ti_0.5)O₂ solid solution

Recent Advances in the Processing and Properties of Alumina–CNT/SiC Nanocomposites

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Comparative study on carbon nanotube- and reduced graphene oxide-reinforced alumina ceramic composites

Cited by 43 publications

References 66 publications

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Suppressing spinodal decomposition by incorporation of reduced graphene oxide into (Sn0.5Ti0.5)O2 solid solution

Recent Advances in the Processing and Properties of Alumina–CNT/SiC Nanocomposites

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Suppressing spinodal decomposition by incorporation of reduced graphene oxide into (Sn_0.5Ti_0.5)O₂ solid solution