Work

Effect of interlayer bonding and stacking structure on the tribological properties of graphene oxide coatings

Year: 2025

Type: article

Abstract: Graphene oxide (GO) coating is widely used while its lubricating performance depends on the stacking structure and operational environment. Here, GO coatings were fabricated by spraying, spinning, and electrostatic self-assembly using Cu 2+ ion as the coordination. The influence of stacking structure on the tribological properties in humid air, dry nitrogen, and vacuum were evaluated. The results show that Cu 2+ -coordinated self-assembled coatings with strong interlaminar bonding and ordered stacking structure exhibit lower wear under test conditions, especially in a vacuum with a stable friction coefficient of ∼0.03, benefit from the increased contact area between GO sheets, reduced stress concentration, inhibited hydrogen bonding between GO and environmental water, and passivates the surface defects of the coating when subjected to shear stress.

Source: Tribology International

DOI: 10.1016/j.triboint.2025.110636

Authors: Mengjiao Wang, Ao Wang, Xiangkai Meng, Xudong Peng, Jinqing Wang

Institutions: Zhejiang University of Technology, Chinese Academy of Sciences, Lanzhou Institute of Chemical Physics, State Key Laboratory of Solid Lubrication

Language: English

Topic: Lubricants and Their Additives

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,390

Funders: National Natural Science Foundation of China, Chinese Academy of Sciences, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Natural Science Foundation of Zhejiang Province