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

作　　者：XIE HongMei JIANG Bin WANG QingHang XIA XiangSheng PAN FuSheng 

机构地区：[1]College of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China [2]Institute of Condensed Matter Physics, College of Physics and Electronic Engineering, Yangtze Normal University, Chongqing 408100, China [3]Chongqing Academy of Science and Technology, Chongqing 401123, China [4]No.59 Institute of China Ordnance Industry, Chongqing 400039, China

出　　处：《Science China(Technological Sciences)》2016年第5期689-698,共10页中国科学（技术科学英文版）

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)

摘　　要：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.

关 键 词：NANO-MOS2 nano-Si02 lubricant additive tribological properties magnesium alloy 

分 类 号：TG115.58[金属学及工艺—物理冶金] TB383.1[金属学及工艺—金属学]