Abstract
The tribological behavior of graphene and graphite as additives in canola oil was investigated with a pin-on-disk tribometer. The wear surfaces of the aluminum pins lubricated with the additive-containing canola oil were analyzed by scanning electron microscopy (SEM). It was found that graphene and graphite as additives in oil show a lower coefficient of friction and wear rate in comparison with neat canola oil. The graphene sheets are more effective than graphite flakes to reduce friction and wear. In addition, there is a proper concentration where the coefficient of friction (COF) and wear are in minimum value. The optimal concentration of the additive in canola oil is about 0.7 wt %. Therefore, the load-carrying capacity and antiwear ability of the lubricating oil are improved. Moreover, the worn surface of aluminum pins is smother in the presence of solid lubricant rather than neat oil.
Highlights
Friction and wear are important issues for energy and materials loss in industry
The map shows the concentration of carbon on the worn surface and indicates that traces of the on the surfaces in the presence of graphene into oil during the test, and that nanoparticles played a element carbon existed on the surfaces in the presence of graphene into oil during the test, and that significant role in acting upon the tribological contacts
This study suggests that both friction and wear can be dramatically improved in the presence of a solid lubricant as an oil additive for canola oil
Summary
Friction and wear are important issues for energy and materials loss in industry. To improve energy efficiency and mechanical durability, the conventional solution is lubricants to reduce friction and wear. Graphite and graphene were used to enhance the tribological properties of materials as reinforcement [17,18,19] or as oil additive [20,21] It is reported a layer of solid lubricant continuously forms on the tribo-surface, during dry sliding of the metal–graphite composites [22,23,24]. Huang et al [20] used graphite nanosheets as an additive in paraffin oil to analyze the tribological behavior with a four-ball and pin-on-disk friction and wear tester They proved that the graphite nanosheets as an additive in oil at proper concentration can improve tribological properties, load-carrying capacity, and antiwear ability, so as to decrease the friction coefficient. The graphite and graphene were mixed with canola oil, and the tribological properties of the graphite and graphene as a lubricating additive in canola oil were investigated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
