Investigation of the tribological behavior of graphene oxide nanoplates as lubricant additives for ceramic/steel contact

Effects of graphene oxide nanoplates (GOPs) as lubricant additives on tribological behavior of Si3N4 ceramic/GCr15 steel pairs were investigated, and especially focused on its effects under different rotational speeds and applied loads. Test results demonstrated that Load-carrying capacity, friction...

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Bibliographic Details
Published in:Tribology international 2018-12, Vol.128, p.113-120
Main Authors: Wu, Lupeng, Xie, Zhijie, Gu, Le, Song, Baoyu, Wang, Liqin
Format: Article
Language:English
Subjects:
Additives
Bearing strength
Carbon
Energy dispersive X ray spectroscopy
Energy measurement
Friction
Friction reduction
Friction resistance
Graphene
Graphene oxide nanoplates
Load carrying capacity
Loads (forces)
Lubricants
Lubricants & lubrication
Lubrication
Raman spectroscopy
Rubbing
Si3N4 ceramics
Tribology
Wear
Wear resistance
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Summary:Effects of graphene oxide nanoplates (GOPs) as lubricant additives on tribological behavior of Si3N4 ceramic/GCr15 steel pairs were investigated, and especially focused on its effects under different rotational speeds and applied loads. Test results demonstrated that Load-carrying capacity, friction reduction and wear resistant were improved by 18.2%,14.7% and 34% with 0.5 wt% GOPs lubrication. Under all tested rotational speeds, GOPs enhanced friction reduction and wear resistance of sliding pairs. Compared to the low applied loads, the tribo-pairs exhibited better tribological properties under high applied loads. The rubbing surfaces were measured by Energy-Dispersive X-ray Spectroscopy and Raman Spectroscopy. The results illustrated that GOPs entered the contact interfaces to prevent tribo-pairs from direct contact, which reduced the materials transfer, friction and wear. •Effects of graphene oxide (GO) on tribological behavior of Si3N4/GCr15 pairs were studied.•Friction and wear were significantly improved by addition of GO.•Addition of GO enhanced the load-carrying capacity of base oil.•GO plays more significant role under heavy loads for Si3N4 /GCr15 tribo-pairs.•GO prevent the material transfer between tribo-pairs.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2018.07.027