• Effect of Contamination on the Friction and Wear of Carboxylic Acids in Aqueous Lubricants 

      Bernat, Szymon Czeslaw; Armada Nieto, Sergio; Espallargas, Nuria (Journal article; Peer reviewed, 2018)
      The friction and wear mechanisms of water-based fluids consisting of various types of carboxylic acids have been systematically investigated using a ball-on-disc tribometer on a super duplex stainless steel under boundary ...
    • Friction Mechanisms by Carboxylic Acids in Aqueous Lubricants 

      Bernat, Szymon Czeslaw; Armada Nieto, Sergio; Espallargas, Nuria (Journal article; Peer reviewed, 2018)
      Carboxylic acids are well known for their friction-reducing abilities driven by the formation of low-shear-strength films on the steel surface. However, understanding of the adsorption mechanisms especially in polar solvents ...
    • Ionic Liquids as Additives in Water‑Based Lubricants: From Surface Adsorption to Tribofilm Formation 

      Khanmohammadi, Hamid; Wijanarko, Wahyu; Espallargas, Nuria (Peer reviewed; Journal article, 2020)
      Ionic liquids (ILs) are potential lubricant additives that can potentially perform simultaneously as friction modifiers and anti-wear agents. In addition, they possess good thermal stability, they are non-flammable, they ...
    • Nanoscale Simulations of Wear and Viscoelasticity of a Semi-Crystalline Polymer 

      Vacher, Robin Sam; de Wijn, Astrid S. (Peer reviewed; Journal article, 2020)
      We investigate the underlying tribological mechanisms and running-in process of a semi-crystalline polymer using molecular-dynamics simulations. We subject a slab of simulated polyvinyl alcohol to a sliding contact asperity ...
    • A Pin-on-Disk Tribometer for Friction and Lubricating Performance in mm-Scale 

      Wu, Jian; Liu, Tonggang; Yu, Ning; Cao, Jiejie; Wang, Kesheng; Sørby, Knut (Peer reviewed; Journal article, 2021)
      A pin-on-disk tribometer for micro-scale applications is presented in this paper. The tribometer consists of a stationary mm-scale pin and a rotating disk. Friction and lubrication film thickness are measured by a laser ...