A scalable and facile synthesis of alumina/exfoliated graphite composites by attrition milling

Lee, Eunsil; Choi, Ki Beom; Lee, Sung Min; Kim, Jong‐Young; Jung, Jong Yeol; Baik, Seung Woo; Lim, Young Soo; Kim, Seungjoo; Shim, Wooyoung

doi:10.1039/c5ra20796g

Cited by 8 publications

(3 citation statements)

References 48 publications

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“…Alumina ceramics have been the most widely studied matrix material in GNP-CMCs [22,23,28,30,[35][36][37]39,63,70,115,[133][134][135][136][137][138][139][140][141][142][143][144][145][146][147][148] owing to their wide use as structural ceramics in automotive, aerospace and biomedical applications. The first study on GNP-CMCs was on Al 2 O 3 -GNP composites by He et al [28] where it was seen that GNPs could be successfully incorporated into a ceramic matrix and consolidated by SPS.…”

Section: Alumina-gnp Compositesmentioning

confidence: 99%

Graphene reinforced metal and ceramic matrix composites: a review

Nieto

Bisht

Lahiri

et al. 2016

International Materials Reviews

516

198

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This review critically examines the current state of graphene reinforced metal (GNP-MMC) and ceramic matrix composites (GNP-CMC). The use of graphene as reinforcement for structural materials is motivated by their exceptional mechanical/functional properties and their unique physical/chemical characteristics. This review focuses on MMCs and CMCs because of their technological importance for structural applications and the unique challenges associated with developing high-temperature composites with nanoparticle reinforcements. The review discusses processing techniques, effects of graphene on the mechanical behaviour of GNP-MMCs and GNP-CMCs, including early studies on the tribological performance of graphenereinforced composites, where graphene has shown signs of serving as a protective and lubricious phase. Additionally, the unique functional properties endowed by graphene to GNP-MMCs and GNP-CMCs, such as enhanced thermal/electrical conductivity, improved oxidation resistance, and excellent biocompatibility are overviewed. Directions for future research endeavours that are needed to advance the field and to propel technological maturation are provided.

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Section: Alumina-gnp Compositesmentioning

confidence: 99%

Graphene reinforced metal and ceramic matrix composites: a review

Nieto

Bisht

Lahiri

et al. 2016

International Materials Reviews

516

198

View full text Add to dashboard Cite

show abstract

“…Graphene/ceramic composites are promising for dielectrics in ceramic capacitors, integrated electronic devices, and sensors, since the composites exhibit a dramatically enhanced dielectric constant near the percolation threshold . Even though the colossal increase of dielectric constant of cermet materials has been of much interests, they have practical problems such as high concentration of metallic species and reliability issues.…”

Section: Introductionmentioning

confidence: 99%

“…Even though the colossal increase of dielectric constant of cermet materials has been of much interests, they have practical problems such as high concentration of metallic species and reliability issues. Recently, the fabrication of graphene or carbon nanotube (CNT)/ceramic composites is drawing attention because low percolation threshold can be achieved due to high aspect ratio of graphene layers/CNTs and their exceptional electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Frequency‐Independent and Colossal Dielectric Permittivity of Platy Alumina/Few‐Layer Graphene Multilayered Composites

Choi

Lee

Hwang

et al. 2018

Bulletin Korean Chem Soc

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In this work, we investigated the dielectric property of layer‐structured Al2O3/few‐layer graphene (FLG) composite by high temperature impedance spectroscopic analysis. The sintered composites have highly enhanced permittivity (ε = 17.3) compared to pure platy alumina (ε = 7.3) with low dielectric loss (tanδ ~ 10−3). Percolative permittivity of the composites exhibits almost frequency‐independent behavior at 1 Hz to 1 MHz even though the real permittivity was increased, compared to that of pure platy alumina. Such behavior can be explained by intervening dielectric interface between alumina and FLG based on multilayer filler model. After percolation threshold (FLG > 0.75 vol %), the permittivity is further enhanced up to ~260 (@1 kHz), which amounts to >35 fold increase, compared to pure platy alumina because of interfacial capacitance between FLG platelets and alumina. According to temperature‐dependent impedance analysis, a dielectric relaxation due to Al2O3/FLG interface is observed in the frequency range of 1 Hz to 1 kHz at high temperature (RT = 400°C) besides that due to Al2O3 grains (>10 MHz). Real permittivity increases up to >20 000 at 400°C at low frequency, whereas dielectric loss remains as tanδ ~ 3 × 10−4. High temperature impedance analysis shows that the effect of interface between Al2O3 and FLG is responsible for such dielectric relaxation at high temperature.

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Recent progress in ceramic matrix composites reinforced with graphene nanoplatelets

Zhou

Fan

et al. 2019

Rare Met.

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A scalable and facile synthesis of alumina/exfoliated graphite composites by attrition milling

Abstract: We present a facile one-pot synthesis of alumina/exfoliated graphite composite having excellent electrical conductivity (>1,000 S m−1), fracture toughness (5.6 MPa m0.5), and wear resistance, which is enhanced by 7.7 times compared to pure alumina.

Cited by 8 publications

References 48 publications

Graphene reinforced metal and ceramic matrix composites: a review

Graphene reinforced metal and ceramic matrix composites: a review

Frequency‐Independent and Colossal Dielectric Permittivity of Platy Alumina/Few‐Layer Graphene Multilayered Composites

Recent progress in ceramic matrix composites reinforced with graphene nanoplatelets

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