|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Real Time Imaging
||NOW ON DEMAND ONLY: In Situ Atomic Force Microscopy Evaluation of the Normal Pressure-dependent Lubrication Mechanism of Phosphonium Phosphate Ionic Liquid
||Filippo Mangolini, Zixuan Li, Andrei Dolocan, Oscar Morales-Collazo, Jerzy T Sadowski, Hugo Celio, Joan F Brennecke
|On-Site Speaker (Planned)
Phosphonium phosphate ionic liquids (PP-ILs) have attracted considerable attention in tribology owing to their high thermal stability, good miscibility in hydrocarbon fluids, and excellent lubrication performance. Despite the weight of previous macroscale tribological studies of PP-ILs, a fundamental understanding of the nanoscale lubrication mechanism is still lacking. Here, we used atomic force microscopy (AFM) to evaluate, as a function of normal pressure, the processes occurring at sliding interfaces in situ, in single-asperity contacts. On the basis of AFM experiments, in which a diamond tip was slid on steel in PP-IL, and laterally-resolved ex situ analyses of the surface chemistry of steel by X-ray photoemission electron microscopy, low energy electron microscopy, and time-of-flight secondary ion mass spectrometry, a phenomenological model will be proposed to account for the observed tribological behavior.
||Characterization, Mechanical Properties, Nanotechnology