Tribological properties of Si3N4–graphene nanocomposites

Mechanical and tribological properties of nanocomposites with silicon nitride matrix with addition of 1 and 3wt% of various types of graphene platelets were studied. The wear behavior was observed by means of the ball-on-disk technique with a silicon nitride ball used as the tribological counterpart...

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Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 33; no. 12; pp. 2359 - 2364
Main Authors Hvizdoš, Pavol, Dusza, Ján, Balázsi, Csaba
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.10.2013
Subjects
Carbon
Carbon nanophases
Coefficient of friction
Friction
Graphene
Nanocomposites
Platelets
Si3N4
Silicon nitride
Tribology
Wear
Si3N4
Friction
Graphene
Carbon nanophases
Wear
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Summary:Mechanical and tribological properties of nanocomposites with silicon nitride matrix with addition of 1 and 3wt% of various types of graphene platelets were studied. The wear behavior was observed by means of the ball-on-disk technique with a silicon nitride ball used as the tribological counterpart at room temperature in dry sliding. Coefficient of friction and specific wear rates were calculated and related to the damage mechanisms observed in the wear tracks. The measured properties were then assessed with respect to the type and volume fraction of the graphene additives. It is shown that addition of such amounts of carbon phases does not lower the coefficient of friction. Graphene platelets seem to be integrated into the matrix very strongly and they do not participate in lubricating processes. The best performance offers materials with 3wt% of larger sized graphene, which have the highest wear resistance.
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ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2013.03.035