Tribological Properties of Carbon Fiber-Reinforced PEEK against 304 Stainless Steel with Reticulate Surface Texture

Abstract

With the aim of improving the durability and reliability of polyetheretherketone (PEEK) composites reinforced with carbon fiber (CF) as thrust bearings without lubricants, a reticulate surface texture was fabricated by plane honing on a stainless steel (SS) counterpart to promote its tribological properties. Pin-on-disk experiments were designed, with the results showing that the reticulate surface texture effectively reduces the friction coefficient from 0.40 to 0.20 compared with the polished SS surface, within the range of the pv value from 0.185 to 1.85 MPa∙m/s. The wear mechanism of the polished SS surface against CF-PEEK, proven with SEM and EDS observations as well as AE measurements, is revealed, falling into abrasive wear with SS particles embedded in the friction interface around the CF strips, causing three-body contact. The reduction in the friction coefficient of the textured SS disk against the CF-PEEK pin can be achieved due to diminution of the CF wear debris and SS particles, which are scraped off by the groove edges and trapped by the groove valleys, reducing the three-body abrasive wear, while the honed plateau is used as a flank surface like a cutting tool to scratch more soft PEEK particles as the transferred film, owing to adhesive wear. This investigation suggests that the SS disk with a honed surface structure can be used as the counterpart of CF-PEEK bearings with a low friction coefficient and wear rate under dry friction.

Effect of acid erosion on the tribological performance of surface texture prepared with laser processing

“…When the textured samples were corroded by hydrochloric acid solution, the surface friction coefficient is the lowest. It is indicated that acid corrosion effect is must existed for the interfacial tribological properties (Meng et al , 2019; Jin et al , 2022).…”

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

“…Abrasive wear is caused by particulate matter, such as hard particles or surface impurities, entering the bearing and generating a cutting action, resulting in grooves and scratches on the bearing surface [37]. Fatigue wear results from pitting and spalling on the bearing surface due to excessive pressure and high rotational speeds inside the bearing [38]. Oxidative wear is caused by high temperatures and oxidation reactions that cause oxidation and spalling on the bearing surface [39].…”