Tribological properties of Si3N4–graphene nanocomposites

Hvizdoš, Pavol; Dusza, Ján; Balázsi, Csaba

doi:10.1016/j.jeurceramsoc.2013.03.035

Cited by 128 publications

(72 citation statements)

References 25 publications

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“…Because of low strength of the interphase boundaries between silicon nitride and graphene, too high an addition of this phase can change the mechanical properties of the composite-but it can be solved by manufacturing gradient materials. Almost, all the research on the Si 3 N 4 -graphen system concerns the mechanical and tribological properties [13][14][15][16]. The author of this study did not found any literature containing data on thermal stability and thermal conductivity of silicon nitride-graphene composites, which is very important from the point of view of the application.…”

Section: Introductionmentioning

confidence: 93%

Thermal stability and conductivity of hot-pressed Si3N4–graphene composites

Rutkowski

Stobierski

Górny

2013

J Therm Anal Calorim

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This study concerns new Si 3 N 4 -graphene composites manufactured using the hot-pressing method. Because of future applications of silicon nitride for cutting tools or specific parts of various devices having contact with high temperatures there is a need to find a ceramic composite material with good mechanical and especially thermal properties. Excellent thermal properties in the major directions are characteristic of graphene. In this study, the graphene phase is added to the silicon nitride phase in a quantity of up to 10 mass%, and the materials are sintered under uniaxial pressure. The mixture of AlN and Y 2 O 3 is added as sintering activator to the composite matrix. The studies focus on thermal stability of produced composites in argon and air conditions up to the temperature of 1,000°C. The research also concerns the influence of applied uniaxial pressure during the sintering process on the orientation of graphene nanoparticles in the Si 3 N 4 matrix. The study also presents research on anisotropy of thermal diffusivity and following thermal conductivity of ceramic matrix composites versus the increasing graphene quantity. Most of the presented results have not been published in the literature yet.

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Section: Introductionmentioning

confidence: 93%

Thermal stability and conductivity of hot-pressed Si3N4–graphene composites

Rutkowski

Stobierski

Górny

2013

J Therm Anal Calorim

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“…Graphene has also proven to be an excellent lubricant additive due to its two-dimensional layered structure. 9,[11][12][13][26][27][28][29] It has been shown that a small amount of graphene solution added to a steel surface displays a four-orderof-magnitude reduction in wear during sliding. The significance of graphene addition was also observed in the reduction in the COF by a factor of 6, which was attributed to a conformal protective graphene coating formation on the sliding steel surface.…”

Section: Introductionmentioning

confidence: 99%

“…However, this study reported a marginal improvement in COF. 26 In a relatively contradictory finding, Hvizdos et al 27 reported the tribological behavior of different types of graphene nanoplate additives to the silicon nitride matrix.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin graphene tribofilm formation during wear of Al₂O₃–graphene composites

Zhangcheng¹,

NietoAndy²,

AgarwalArvind³

2016

Nanomaterials and Energy

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Graphene nanoplatelet (GNP)-reinforced aluminum oxide (Al 2 O 3 ) composites were sintered by spark plasma sintering in three different compositions (0, 0·5, 5 vol.% GNPs). To investigate the effects of graphene addition on the composites' wear resistance, ball-on-disk wear tests were conducted under very high normal load (40 N) by using a 3-mm-dia. ceramic counterface. Aluminum oxide-0·5 vol.% GNP exhibited 65% improvement in the wear resistance, while aluminum oxide-5 vol.% GNP displayed 53% poorer wear resistance as compared with aluminum oxide. The coefficient of friction was 0·45 for aluminum oxide-0·5 vol.% GNP, 0·40 for aluminum oxide-5 vol.% GNP and 0·60 for aluminum oxide. The highest wear resistance of aluminum oxide-0·5 vol.% GNP is attributed to formation of a continuous, protective and ultrathin graphene tribofilm on the wear surface. Tribofilm formation occurs due to the high shear forces induced by countersurface movement and localized heating, which causes GNP's delamination, overlap and welding together. In the case of aluminum oxide-5 vol.% GNP, poor dispersion and agglomeration of GNP results in a thick and discontinuous graphene tribofilm, which does not protect from the brittle fracture of aluminum oxide grains during wear.

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“…In case of ceramic materials, the graphene particles are used to improve the mechanical properties of such wellknown material as alumina, silicon nitride and silicon carbide [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. As a two-dimensional phase, graphene shows very good electrical and thermal properties [21,22].…”

Section: Introductionmentioning

confidence: 99%

Thermal properties of pressure sintered alumina–graphene composites

Rutkowski

Klimczyk

Jaworska

et al. 2015

J Therm Anal Calorim

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The work concerns the alumina-graphene materials sintered by two different pressure methods. The different particle sizes of graphene were used. The preparation route of the matrix-graphene mixture was discussed in the paper. The so-prepared compositions with different amount of graphene were hot-pressed and spark plasma sintered. The influence on uniaxial pressure during the sintering process on the microstructure was presented by the SEM microstructural observations and ultrasonic measurements. The material with unidirectional oriented graphene particles was prepared, and the anisotropy was even higher than 30 % for 10 mass% of graphene additive. The influence of graphene orientation as an effect of pressing process on the thermal properties was analysed. The anisotropy of thermal conductivity was 90 % for 10 mass% of graphene. The thermal diffusivity and thermal conductivity of composites manufactured by hotpressing and spark plasma sintering method were compared. The experiment-based calculation of the specific heat versus temperature was presented in the paper. The thermal expansion coefficient was determined by dilatometric method. The thermal stability was analysed by thermogravimetric method, and it showed that composites with up to 2 mass% of graphene can work at temperatures higher than 700°C.

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Tribological properties of Si3N4–graphene nanocomposites

Cited by 128 publications

References 25 publications

Thermal stability and conductivity of hot-pressed Si3N4–graphene composites

Thermal stability and conductivity of hot-pressed Si3N4–graphene composites

Ultrathin graphene tribofilm formation during wear of Al₂O₃–graphene composites

Thermal properties of pressure sintered alumina–graphene composites

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Tribological properties of Si3N4–graphene nanocomposites

Cited by 128 publications

References 25 publications

Thermal stability and conductivity of hot-pressed Si3N4–graphene composites

Thermal stability and conductivity of hot-pressed Si3N4–graphene composites

Ultrathin graphene tribofilm formation during wear of Al2O3–graphene composites

Thermal properties of pressure sintered alumina–graphene composites

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Ultrathin graphene tribofilm formation during wear of Al₂O₃–graphene composites