Tribological Properties of Nano-ZrO2 and PEEK Reinforced PTFE Composites Based on Molecular Dynamics

Polytetrafluoroethylene (PTFE) is a polymeric material with excellent self-lubricating properties. In this study, in order to improve the wear resistance of PTFE, PTFE matrix was filled soft-phase polyetheretherketone (PEEK) particles and hard-phase nano-ZrO2 varying volume ratios. A linear reciprocating friction tester used test tribological properties composites. Optical microscopy (OM) scanning electron (SEM) were utilized observe formation evolution transfer film on surface counterpart metal during process. Molecular dynamics simulation software (Materials Studio MS) simulate analyze frictional behavior between molecular structures composites iron atoms microscopic scale. The results showed that uniformity firmness had an important influence material. PEEK ZrO2 nanoparticles able rate film, respectively, resulting significant improvement (volume reduced from 7.7 × 10−4 mm3/Nm for pure 1.76 10−6 nano-ZrO2/PEEK/PTFE). simulations revealed poor due interlayer slippage within its chains. chains could effectively adsorb formed strong bond. also contributed overall stability matrix. Both soft hard fillers significantly inhibited chains, enhancing shear deformation thus improving