Severe sliding wear condition of a ball bearing in engine oil and nano-bio-lubricant

Wong, Hing Xiang (2021) Severe sliding wear condition of a ball bearing in engine oil and nano-bio-lubricant. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A new green technology to replace conventional engine lubricant is arrived. The original engine lubricant usually is refined which sourced from natural source. It contains hydrocarbon substance that will cause several of side effects to human being and environment. Furthermore, massive use of natural source brings energy crisis too. Therefore, expanded worries about the harm brought by conventional oil-based lubricants have made an improvement by replace it to bio-lubricant with nanoparticle additives. This report describes severe sliding wear condition of a ball bearing in engine oil and nano-bio-lubricant by evaluate the coefficient of friction and wear scar diameter and make a comparative study from journals which using bio-lubricant blended with nanoparticle additive. For instance, SAE 10W-40 engine oil (MO), palm kernel oil (PKO), palm kernel oil blended with nanoparticle copper oxide (PKO+CuO), palm oil (PO), palm oil added with hexagonal boron nitride (PO+hBN) and soybean oil (SO) are used to be discuss in this report. Four ball tester is used to obtain the data by following parameter which are applied load of 20 and 30kg, spindle speed of 1500,1750, 2000RPM and 100 ̊C working temperature. The results analysis was focused on trending of friction coefficient and wear scar diameter and friction coefficient of lubricant under the most severe sliding wear condition. It was found that the trending of friction coefficient and wear scar diameter of MO is increasing when the parameter value increased. PKO and PKO+CuO showed decreasing trend in COF but increasing in wear scar diameter. PO and PKO had lower COF compared to engine oil with decrement percentage of COF about 39.3% and 45.1% respectively. In aspect of additive, CuO additive reduce COF about 3.15% whereas hBN increased by 5.71%.

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