Tribological Capabilities of Graphene and Titanium Dioxide Nano Additives in Solid and Liquid Base Lubricants

被引:11
作者
Patel, Jankhan [1 ]
Kiani, Amirkianoosh [1 ]
机构
[1] Ontario Tech Univ UOIT, Fac Engn & Appl Sci, Silicon Hall Micro Nano Mfg Facil, Oshawa, ON L1G 0C5, Canada
来源
APPLIED SCIENCES-BASEL | 2019年 / 9卷 / 08期
基金
加拿大自然科学与工程研究理事会;
关键词
titanium dioxide; graphene; grease; base oil; friction; wear; EXFOLIATED GRAPHENE; NANOFLUIDS; OXIDE;
D O I
10.3390/app9081629
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this study, the tribological behavior of both liquid (oil) and semi-liquid (grease) lubricants enhanced by multilayer graphene nano platelets and titanium dioxide nano powder was evaluated using ball-on-disk and shaft-on-plate tribo-meters. Oil samples for both 2D graphene nano platelets (GNP) and titanium nanopowders (TiNP) were prepared at three concentrations of 0.01 %w/w, 0.05 %w/w and 0.1 %w/w. In addition, 0.05% w/w mixtures of GNP and TiNP were prepared with three different ratios to analyze collective effects of both nano additives on friction and wear properties. For semi-liquid lubricants, 0.5% w/w concentrations were prepared for both nano additives for shaft-on-plate tests. Viscosity and oxidation stability tests were conducted on the liquid-base lubricants. Nano powders of both additive and substrate were analyzed using transmission electron microscopy (TEM) and scanning electron microscopy (SEM). In addition, Raman spectroscopy was conducted to characterize the graphene and titanium dioxide. The study shows that adding graphene and titanium dioxide individually sacrifices either the wear or friction of lubricants. However, use of both additives together can enhance friction resistance and wear preventive properties of a liquid lubricant significantly. For a semi-liquid lubricant, the use of both additives together and individually reduces friction compared to base grease.
引用
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页数:12
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