In-situ formation of onion-like carbon film by tribo-induced catalytic degradation of hydrocarbon: Effect of lubrication condition and load

作者：Xu, Xing; Li, Qiang; Su, Fenghua^*; Sun, Jianfang; Li, Wenfang

来源：Chemical Engineering Journal, 2023, 459: 141566.

DOI：10.1016/j.cej.2023.141566

• MoN-Ag coating
• Onion -like carbon
• Formation in
• situ
• Tribo-induced catalytic effect
• Lubricating medium

The method of extracting a carbon-based film from a lubricating medium has attracted considerable interest due to its sustainable lubrication capabilities. However, the effect of the lubrication conditions and applied loads on the in-situ formation mechanism of the carbon-based film remains unknown. Here, the tribological properties of the MoN-Ag coating lubricated with octadecane, oleic acid, and 1-octadecene were investigated using a ball-ondisk tribo-tester. The MoN-Ag coating's tribo-induced catalytic effects in these lubricating mediums were revealed by SEM-EDS, Raman, XPS, and TEM analysis. The results showed that the MoN-Ag coating could frictionally induce the degradation of these lubricating mediums to generate carbon-based film with an amorphous/onion-like structure. And the coating had a better tribo-induced catalytic effect in octadecane than the other lubricating mediums. In combination with the first-principles simulation, it was indicated that the insitu formation ability of the carbon film depended on the lubricating medium's functional groups and adsorption energy. These findings refined the design theory of the tribo-induced catalytic system and introduced a novel concept for the selection of lubricating medium in engineering applications.

• 单位
  东莞理工学院