Preparation and tribological behaviors of a novel organic-inorganic hybrid resin bonded solid lubricating coating cured by ultraviolet radiation

Here a novel organic-inorganic hybrid bonded solid lubricating coating with excellent tribological properties was prepared by an efficient and low-cost method of ultraviolet radiation technique. The nano-indentation and scratch tests were conducted to evaluate the mechanical properties of the hybrid coating with different inorganic content. In addition, the effects of polytetrafluoroethylene (PTFE) content and test conditions on tribological behaviors of the hybrid lubricating coatings were investigated. The experimental results show that the indentation hardness and elastic modulus of the hybrid coatings were improved synchronously by increasing the inorganic content in the binder formulations, and the hybrid coating containing 10 wt. % inorganic components presented better scratch resistance than others. Moreover, the best tribological properties were obtained when the mass ratio of PTFE to binder was 0.4. And the hybrid lubricating coating showed good resistance to the variation of sliding speed (frequency) and was susceptible to the load applied in present work.