Improved Tribological Performance of Amorphous Carbon (a-C) Coating by ZrO2 Nanoparticles
AbstractNanomaterials, such as Graphene, h-BN nanoparticles and MoS2 nanotubes, have shown their ability in improving the tribological performance of amorphous carbon (a-C) coatings. In the current study, the effectiveness of ZrO2 nanoparticles (ZrO2-NPs) in lubricating the self-mated nonhydrogenated a-C contacts was investigated in boundary lubrication regime. The results showed that 13% less friction and 50% less wear compared to the base oil were achieved by employing ZrO2-NPs in the base oil in self-mated a-C contacts. Via analyzing the ZrO2-NPs and the worn a-C surface after tests, it was found that the improved lubrication by ZrO2-NPs was based on “polishing effects”, which is a new phenomenon observed between a-C and nanoparticles. Under the “polishing effect”, micro-plateaus with extremely smooth surface and uniform height were produced on the analyzed a-C surface. The resulting topography of the a-C coating is suitable for ZrO2-NPs to act as nano-bearings between rubbing surfaces. Especially, the ZrO2-NPs exhibited excellent mechanical and chemical stability, even under the severe service condition, suggesting that the combination of nonhydrogenated a-C coating with ZrO2-NPs is an effective, long lasting and environment-friendly lubrication solution. View Full-Text
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Tang, J.; Ding, Q.; Zhang, S.; Wu, G.; Hu, L. Improved Tribological Performance of Amorphous Carbon (a-C) Coating by ZrO2 Nanoparticles. Materials 2016, 9, 795.
Tang J, Ding Q, Zhang S, Wu G, Hu L. Improved Tribological Performance of Amorphous Carbon (a-C) Coating by ZrO2 Nanoparticles. Materials. 2016; 9(10):795.Chicago/Turabian Style
Tang, Jinzhu; Ding, Qi; Zhang, Songwei; Wu, Guizhi; Hu, Litian. 2016. "Improved Tribological Performance of Amorphous Carbon (a-C) Coating by ZrO2 Nanoparticles." Materials 9, no. 10: 795.
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