Comparative Study of the Tribological Properties of CFRPEEK, Stainless and Carbon Steel in High Water-Based Fluid

Abstract

The advantageous physical and chemical properties of carbon-fiber-reinforced polyetheretherketone (CFRPEEK) make it a suitable friction pair for water hydraulic components. To explore the selection of friction pair materials, this paper investigated the tribological properties of CFRPEEK, stainless and carbon steel in water and high water-based fluids, and evaluated them using reciprocating friction and wear tester. After the test, the wear surface morphology of the contact surface was observed under an electron microscope. The results show that the degree of friction between specimens is dependent on the load and frequency. Meanwhile, both 316L and CFRPEEK have good tribological properties in both mediums. Microscope observation analysis showed that CFRPEEK surfaces easily absorb water to create a water film, thus improving its performance and reducing wear. Additionally, the friction between stainless and carbon steel in high water-base fluid will generate a lubricating film, the surface of which shows excellent tribological properties. The final conclusion was that the choice of material for plunger pair material depends on the medium, with 304-316L being more suitable for high water-based fluids, while CFRPEEK-316L is more suitable for water.

Keywords:

• Friction and wear
• CFRPEEK
• lubrication
• high water-based fluid

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The project was financially supported by the National Natural Science Foundation of China (Grant no. 51505111), the Fundamental Research Funds for the Provincial Universities of Zhejiang (Grant no. GK229909299001-406), the Natural Science Foundation of Zhejiang Province (Grant no. Y21E050035), and China Postdoctoral Science Foundation (No. 2023M733767).