Although graphene oxide (GO) has emerged as an excellent lubricant additive in water, there remain great challenges in their prac-tical application due to high production costs. By taking into account the low cost and also its excellent tribological properties, it is likely that nano-SiO2 can be used as a lubricant additive to partially replace GO. Hence, this paper aims to explore the tribological properties of nano-SiO2 incorporated in GO nanofluids for partial GO replacement by investigating the friction coefficient and wear volume of the prepared SiO2/GO hybrid nanofluids for magnesium alloy/steel sliding pairs. The experiments reveal that the SiO2/GO hybrids retain low friction coefficients as compared to individual GO or SiO2 at all test conditions in this study. However, as for the bearing capacity test, all samples can provide a low wear volume under the loads of 1 and 3 N. With the increase of the normal load, there is considerable differences in the anti-wear behavior. Compared with that of individual GO nanofluids, the wear volume of the GO/SiO2 (mass ratio of 0.3:0.2) hybrid nanofluids was reduced by 50.5％ at 5 N and by 49.2％ at 8 N. Furthermore, the wear volume of the GO/SiO2 (mass ratio of 0.3:0.2) hybrid nanofluids was reduced by 46.3％ under the rigorous conditions, as compared to individual GO nanofluids. The findings provide new insights into developing carbon nan-omaterial-based hybrid nanofluids for magnesium alloy formation.

College of Materials Science and Engineering,Yangtze Normal University,Chongqing 408100,China;Loncin Industry,Chongqing 400052,China

[1]Hongmei Xie;Jiahong Dai;Dan Zhou-.Tribological behaviors of graphene oxide partly substituted with nano-SiO2 as lubricant additives in water for magnesium alloy/steel interfaces)[J].矿物冶金与材料学报,2022(07):1425-1434

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