INFLUENCE OF DISPERSING OIL BY ABRASIVE NANO AND MICROPARTICLES ON THE FRICTION AND WEAR DURING SCRATCH TEST

Authors

1 Mechanical Engineering Dept., Faculty of Engineering, Suez Canal University, EGYPT,

2 Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, Minia 61111, EGYPT.

Abstract

The present study discusses the influence of dispersing lubricating oil by aluminium oxide (Al2O3), silicon oxide (SiO2) and silicon carbide (SiC) nano and microparticles on the friction coefficient and wear displayed by the scratch of copper sheet.
 
The experimental results showed that clean oil showed the highest friction coefficient and wear values followed by oil dispersed by nano and microparticles of SiO2, Al2O3 and SiC. As the normal load increased, friction coefficient and wear remarkably increased. The reduction of both wear and friction coefficient observed for dispersed oil with the tested nano and microparticles may be from the embedment of nano and microparticles in the surface of substrate and forming a protective layer on the substrate. It was observed that nanoparticles showed higher friction and wear values than that detected for microparticles due to their agglomeration in the contact area and increasing the shear stress between the stylus and substrate as well as the particles themselves. Besides, nanoparticles polish the asperities of the scratched substrate.

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