Tribological Performance Of Expanded Graphite As Oil Lubricating Additive

Hidayat, Muhammad Yusuf (2019) Tribological Performance Of Expanded Graphite As Oil Lubricating Additive. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This study is focusing on the effect of mineral engine oil with Expanded Graphite (EG) nanoparticles as an additive. The optimal composition of additive added into mineral oil is about 0.5% volume and it is dispersing by using a sonication technique. Then, the most optimal temperature in the Coefficient of Friction is at 75°C. The tools for the tribological testing is Four Ball Tester according ASTM D-4172 standard. The volume loss of ball is analyzing to get the value of wear volume between the engine oil with additives and non-additives. Minimum value of wear volume is found at 0% and 0.5%, both of these show the smallest wear volume in base engine oil when compared to 0.2% EG. For coefficient of friction in term of sliding time. At 75°C, engine oil with 0.5% EG has the best coefficient of friction at a stable engine running condition when compared to all engine oils against temperatures of 40°C and 120°C. Then, Wear scar observation on 0% and 0.5% EG at temperature 75°C. They show different wear patterns with parallel grooves. 0.5% EG has shallow scratches when compared to 0% EG which has more deep grooves.The result of the experimental studies has shown a potential and effective way in reducing friction and wear at the most optimum temperature by apply EG as an additive in the lubricant oil

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