Tribological Performance of CF-PEEK Sliding against 17-4PH Stainless Steel with Various Cermet Coatings for Water Hydraulic Piston Pump Application

• Main Authors: Songlin Nie, Fangli Lou, Hui Ji, Fanglong Yin
• Format: Article
• Language: English
• Published: MDPI AG 2019-07-01
• Series: Coatings
• Subjects: tribological performance; cermet coating; CF-PEEK; water lubrication
• Online Access: https://www.mdpi.com/2079-6412/9/7/436

To improve the abrasion resistance performance of the critical tribopairs within water hydraulic piston pumps, tribological characteristics of the stainless steel 17-4PH and 17-4PH coated with Cr₃C₂-NiCr, WC-10Co-4Cr, Cr₂O₃ and Al₂O₃-13%TiO₂ sliding against carbon fiber reinforced polyetheretherketone (CF-PEEK) composite under water-lubricated condition were experimentally studied using a pin-on-ring test bench with different working conditions. It has been demonstrated by the experimental results that the tribological behaviors of CF-PEEK/cermet coatings tribipairs were better than that of CF-PEEK/17-4PH tribopair under water lubrication. However, the Cr₃C₂-NiCr coating could be damaged under high rotational speed. Due to the reaction film produced by the Al₂O₃-13%TiO₂ and water, the CF-PEEK/Al₂O₃-13%TiO₂ material combination exhibits more excellent tribological behaviors than other tribopairs lubricated with water, and could preferentially be used in water hydraulic piston pumps.