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      저자 : Vijaykumar S. Jatti (검색결과 1 건)
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        Copper oxide nano-particles as friction-reduction and anti-wear additives in lubricating oil

        Vijaykumar S. Jatti,T. P. Singh 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.2

        Lubricants based on hydrocarbon-type mixtures do not satisfy all requirements of OEMs (Original equipment manufacturers) for modernapplications. The usual solution is the addition of small amounts of certain additive compounds that render significant improvementsin base oil properties such as oxidative degradation, tribological performance and other characteristics. This study examined the tribologicalbehavior of copper oxide nanoparticles as additives in mineral based multi-grade engine oil. All tests were performed undervarying loads and concentrations of nanoparticles in lubricating oil. The friction and wear experiments were performed using pin on disctribotester. The results demonstrated that nanoparticle additives can effectively improve the engine oil lubricating properties. This is becausenanoparticles enter the friction zone along with the flow of lubricant. They convert sliding friction into rolling friction, thus reducingthe effective friction coefficient. This work also included an analysis of worn surface morphology by scanning electron microscopy. This surface examination revealed that nanoparticle additives resulted in smoother worn surfaces. From the viscosity test it can be inferredthat viscosity of engine oil contains CuO nanoparticles is a function of nanoparticles concentration. Stribeck curves are used toreveal the lubrication regimes where the CuO nano-particles are most effective. It was found that the addition of CuO nanoparticles to thebase oil results in up to 50% reduction in coefficient of friction in the mixed lubricant regime.

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