Anthracite sheets were coated by sorbitol fatty acid ester(span80)through ball-milling process.The tribological properties of the span80-coated anthracite sheets as the additive in polyalpha olefin were evaluated thro...Anthracite sheets were coated by sorbitol fatty acid ester(span80)through ball-milling process.The tribological properties of the span80-coated anthracite sheets as the additive in polyalpha olefin were evaluated through a series of friction tests using a four ball machine.The results revealed that the span80-coated anthracite sheets exhibited excellent dispersion stability in base oil.In addition,compared with base oil,the average coefficient of friction,wear scar diameter,and wear volume of modified oil at a mass fraction of 0.03%span80-coated anthracite sheets decreased by 45.39%,60.13%,and 95.95%,respectively.The oil containing span80-coated anthracite sheets achieved good friction-reducing and anti-wear effects over a wide range of applied loads,temperatures,or rotating speeds.Control experiments were performed as well.The results obtained using span80-coated anthracite sheets were superior to those obtained using pure anthracite.The lubrication mechanism was attributed to the synergistic action of the crystalline and amorphous carbon in anthracite sheets as they formed a protective film and played a mitigative role on the surface of friction pair,which mitigated the wear extent of the friction pair.展开更多
基金supported by National Natural Science Foundation of China(No.51373059)Science and Technology Projects in Fujian Province(Nos.2017H2001,2018H0019,and 2018H6012),Science and Technology Innovation Team of Huaqiao University(No.Z14X0046)Subsidized Project for Postgraduates’Innovative Fund in Scientific Research of Huaqiao University,the Graphene Powder&Composite Research Center,Development and Reform Commission of Fujian Province。
文摘Anthracite sheets were coated by sorbitol fatty acid ester(span80)through ball-milling process.The tribological properties of the span80-coated anthracite sheets as the additive in polyalpha olefin were evaluated through a series of friction tests using a four ball machine.The results revealed that the span80-coated anthracite sheets exhibited excellent dispersion stability in base oil.In addition,compared with base oil,the average coefficient of friction,wear scar diameter,and wear volume of modified oil at a mass fraction of 0.03%span80-coated anthracite sheets decreased by 45.39%,60.13%,and 95.95%,respectively.The oil containing span80-coated anthracite sheets achieved good friction-reducing and anti-wear effects over a wide range of applied loads,temperatures,or rotating speeds.Control experiments were performed as well.The results obtained using span80-coated anthracite sheets were superior to those obtained using pure anthracite.The lubrication mechanism was attributed to the synergistic action of the crystalline and amorphous carbon in anthracite sheets as they formed a protective film and played a mitigative role on the surface of friction pair,which mitigated the wear extent of the friction pair.
