Paper Title :Hybrid Nano Additives as Engine Lubricants
Author :Ali Can Yilmaz
Article Citation :Ali Can Yilmaz ,
(2018 ) " Hybrid Nano Additives as Engine Lubricants " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 14-16,
Volume-6,Issue-1
Abstract : The purpose of this study is to observe the effect of hybrid SiO2-TiO2nano additive in engine oil on friction and
wear characteristics. A reciprocating test rig was used to investigate average friction coefficient under various nano additive
concentrations and lubrication regimes (Stribeck parameter). Glycol was used as solvent for nano additives before mixing
with engine oil in order to prevent them from oxidizing with air. Considering good dispersion and solubility, average
diameters of the nano additives were preferred to be 12 nm and 10 nm for SiO2 and TiO2, respectively. Observations
depicted that, nano additive concentrations over 0,1% wt. lead to increase in friction coefficient. Compared to commercial
engine oil, average friction coefficient reductions of 25%, 18% and 7% for nano-lubricant were observed within boundary,
mixed and hydrodynamic lubrication regimes, respectively. It was clear that, deposition of tribochemical reaction products
generated by nanoparticles could yield antiwear boundary film formation between piston ring and the substrate and reduction
in shear stress. On the other hand, spherical shape of nano additives provided transformation of sliding friction into rolling
friction in which the contact surface area is smaller. Under specific loads, nano
Type : Research paper
Published : Volume-6,Issue-1
DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-10689
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Published on 2018-03-24 |
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