Wear resistance of composites based on ultrahigh molecular weight polyethylene filled with graphite and molybdenum disulfide microparticles

Abstract

Tribological characteristics of ultrahigh molecular weight polyethylene (UHMWPE) based compositions with graphite and molybdenum disulfide are studied under conditions of dry friction, boundary lubrication, and abrasive wear. It is shown that, under dry sliding friction, the wear rate of UHMWPE-graph ite and UHMWPE-MoS 2 polymer compositions is halved as compared to that of pure UHMWP, while their mechanical characteristics change only slightly. Under the conditions of abrasive wear, the wear resistance of these composites increases by 1.3-1.5 times. Concentrations of the fillers, which are optimum for improving the wear resistance, are determined. The supramolecular structure and the topography of worn surfaces of the UHMWPE compositions with various concentrations of the fillers are examined. A comparative analysis of the wear resistance of the composites under conditions of dry friction and lubrication is carried out. Mecha nisms of the wear of the UHMWPE-graphite and UHMWPE-MoS 2 polymer compositions under condi tions of dry sliding friction and abrasive wear are discussed.

The relations between wear behavior and basic material properties of graphene‐based materials reinforced ultrahigh molecular weight polyethylene

“…From the micrographs in Figure 6, the formation bonding between the melted particles was observed and analyzed. In this study, the blending temperature was optimized based on both matrix and fillers melt processing temperature; 185°C for 60 min, 20,38,46,51,52 where the formation of physical adhesion between particles can be observed. In Figure 6A, UHMWPE/0.1GF was blended, and particle diffusion and adhesion formation can be observed.…”

Effects of surface wettability and thermal conductivity on the wear performance of ultrahigh molecular weight polyethylene/graphite and ultrahigh molecular weight polyethylene/graphene oxide composites

“…Incorporating graphitic particles such as graphite or graphene into UHMWPE exhibited excellent lubricating ability. Superlubricity appears upon the formation of a transfer layer originated by material transfer of graphite or graphene from composite surface to the metal counterface 7 . Earlier studies reported that the mass fraction of filler played a significant role in decreasing wear rate.…”

“…Recent research has identified that combining graphitic carbon materials included graphite, 7–10 graphene, 11–13 carbon nanotubes, 14–16 and UHMWPE, has significantly improved the friction and wear performance of the composites. Incorporating graphitic particles such as graphite or graphene into UHMWPE exhibited excellent lubricating ability.…”

Tungsten carbide, boron carbide, and MWCNT reinforced poly(aryl ether ketone) nanocomposites: Morphology and thermomechanical behavior

“…The X‐ray protective, mechanical, and chemical properties were improved when ultra‐high molecular weight polyethylene (UHMWPE) was filled with tungsten and B 4 C particles . Various studies were carried out on UHMWPE with variety of fillers like aluminum oxide (Аl 2 О 3 ), copper (Cu) and silicon dioxide (SiO 2 ), graphite, and molybdenum disulfide (MoS 2 ), to enhance different properties of the respective UHMWPE hybrid polymer composites. The synergetic properties of two or more fillers in a polymer matrix led to development of hybrid composites with an overall improvement in mechanical, thermal, chemical, and physical stability …”