Antiwear Properties of Bonded MoS₂ Solid Lubricant Coating under Dual-Rotary Fretting Conditions

ABSTRACT

Bonded MoS₂ solid lubricant coatings are widely used in tribology for their friction-reducing and antiwear properties. However, such coatings have been rarely investigated in complex fretting conditions, such as dual-rotary fretting (DRF). DRF is a complex fretting wear mode that combines torsional fretting with rotational fretting. In this work, the antiwear properties of bonded MoS₂ solid lubricant coating under dual-rotary fretting conditions were studied. Results indicated that the MoS₂ coating had better friction-reducing and antiwear properties than the substrate for alleviating DRF wear. The coating can greatly influence the fretting regimes and reduce the coefficient of friction. Furthermore, the service life of the coating was strongly dependent on the competition of the two fretting components and was reduced as the rotational fretting component increased.

KEYWORDS:

• Dual-rotary fretting
• bonded MoS₂
• solid lubricant coating
• friction-reducing and antiwear properties

Funding

The authors are grateful for financial support from the National Scientific Foundation of China (Nos. U1530136, 51375407, and 51305398) and Innovative Team Development Plan (Ministry of Education) of China IRT_15R57.