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Study of tribological properties and lubrication mechanism of surfactant-coated anthracite sheets used as lubricant additives
Friction ( IF 6.8 ) Pub Date : 2020-06-15 , DOI: 10.1007/s40544-019-0357-4
Hailong Liu , Yajing Huang , Yaozhu Wang , Xiaomin Zhao , Danqing Chen , Guohua Chen

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.



中文翻译:

用作润滑剂添加剂的表面活性剂涂覆无烟煤片材的摩擦学性能和润滑机理的研究

通过球磨工艺将无烟煤片材涂上山梨醇脂肪酸酯(span80)。通过使用四球机的一系列摩擦测试,评估了span80涂层无烟煤片材作为聚α烯烃中添加剂的摩擦学性能。结果表明,span80涂层的无烟煤片在基础油中显示出优异的分散稳定性。另外,与基础油相比,质量分数为0.03%span的80涂层无烟煤片的平均摩擦系数,磨损痕直径和磨损量分别降低了45.39%,60.13%和95.95%。含油,span80涂层的无烟煤片材在各种施加的载荷,温度或转速范围内均具有良好的减摩和抗磨效果。还进行了对照实验。使用span80涂层的无烟煤片获得的结果优于使用纯无烟煤获得的结果。润滑机理归因于无烟煤片中的结晶碳和无定形碳形成保护膜并在摩擦副表面上起到了缓解作用,从而减轻了摩擦副的磨损程度。

更新日期:2020-06-15
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