摘要
The tribological properties of combinative addition of nano-MoS_2 and nano-SiO_2 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-SiO_2 to nano-MoS_2 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-MoS_2 and nano-SiO_2, in comparison with single nanoparticles addition, is more pronounced in terms of the lubrication film stability. The excellent tribological properties of the SiO_2/MoS_2 combinations are attributed to the formation of physical adsorption films and tribochemical products during the rubbing process and the micro-cooperation of various nanoparticles with different shapes and lubrication mechanisms.
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.
基金
supported by the National Natural Science Foundation of China(Grant No.51171212)
Chongqing Science and Technology Commission(Grant Nos.CSTC2012JJJQ50001,CSTC2013jcyj C60001&cstc2012gg B50003)
the National Science and Technology Program of China(Grant No.2013DFA71070)
the Fundamental Research Funds for the Central Universities(Grant No.CDJZR13138801)
the Fundamental Research Funds for the Yangtze Normal University(Grant No.CJSF2010C025)
