Journal
TRIBOLOGY INTERNATIONAL
Volume 135, Issue -, Pages 170-180Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2019.02.031
Keywords
Graphene oxide; Alumina; Lubricant; Friction
Categories
Funding
- Baosteel [BA13012]
- Australian Research Council [LP150100591]
- Australian Research Council [LP150100591] Funding Source: Australian Research Council
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Graphene oxide (GO) and alumina (Al2O3) nanoparticles were added in deionized water in order to synthesise a dimensionally integrated nanolubricant. Tribological tests were performed using an alloy/stainless steel contact pair. A 0.12 wt% 1:1 GO-Al2O3 lubricant produced 64% and 47% reductions in the COF as well as 63% and 60% improvements in the Ra compared with 0.06 wt% Al2O3 and 0.06 wt% GO solutions. Analysis of the worn surface indicated that a thin film consisting of a layer of GO and a tribo-layer of Al2O3 was formed during testing. The GO layer prevented the direct contact of surface asperities, leading to a low resistance to sliding, whilst the Al2O3 tribo-layer acted as a load bearer to strengthen the GO layer.
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