Abstract
In this study, we prepared a‐C:H films with different nanostructures at different methane flow rates. The effect of the methane flow rate on the tribological properties of 440 steel/a‐C:H friction pairs and a‐C:H:Ti/a‐C:H friction pairs in an atmospheric environment was studied by a reciprocating friction machine. The results show that there is no relationship between the tribological properties of 440 steel/a‐C:H friction pair and methane flow rate. The tribological performance of the a‐C:H:Ti/a‐C:H friction pair was greatly improved. In particular, in the friction pair of a‐C:H:Ti/a‐C:H with a methane flow rate of 20 sccm, superlubricity is shown, and the wear rate is only 4.04 × 10−9 mm3/Nm. After tribological experiments, Raman spectroscopy, XPS, and other characterization methods were used to study the relationship between the nanostructure and tribological properties of a‐C:H:Ti films and a‐C:H prepared with different methane flow rates. This study is great significance to the application of a‐C:H:Ti/a‐C:H friction pair in mechanical parts under atmospheric environment.
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