Effects of combined additions of SiO2 and MoS2 nanoparticles as lubricant additive on the tribological properties of AZ31 magnesium alloy

The tribological properties of combinative addition of nano-MoS2 and nano-SiO2 to the base oil have been investigated with a reciprocating ball-on-plate tribotester for magnesium alloy-steel contacts. The results demonstrate that the optimum mass ratio of nano-SiO2 to nano-MoS2 is 0.25：0.75. The opt...

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Bibliographic Details
Published in:Science China. Technological sciences 2016-05, Vol.59 (5), p.689-698
Main Authors: Xie, HongMei, Jiang, Bin, Wang, QingHang, Xia, XiangSheng, Pan, FuSheng
Format: Article
Language:English
Subjects:
AZ31镁合金
Engineering
复合添加
摩擦磨损性能
摩擦磨损试验机
润滑油添加剂
纳米MoS2
纳米SiO2
纳米二硫化钼
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Summary:The tribological properties of combinative addition of nano-MoS2 and nano-SiO2 to the base oil have been investigated with a reciprocating ball-on-plate tribotester for magnesium alloy-steel contacts. The results demonstrate that the optimum mass ratio of nano-SiO2 to nano-MoS2 is 0.25：0.75. The optimum combinative addition into the base oil reduces the friction coefficient by 43.8% and the surface roughness （Sa） by 31.7% when compared to that found with the base oil. Meanwhile, the combinative addition of nano-MoS2 and nano-SiO〉 in comparison with single nanoparticles addition, is more pronounced in terms of the lubrication film stability. The excellent tribological properties of the SiO2/MoS2 combinations are attributed to the formation of physical adsorption films and tribochemical products during the rubbing process and the micro-cooperation of various nano- particles with different shapes and lubrication mechanisms.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-015-5990-1