Tribology Letters

Abstract This study investigates the liquid-phase deposition (LPD) of carbonaceous tribopolymeric films from cyclopropane-carboxylic acid (CPCa), an additive dissolved in polyalphaolefins, under boundary-lubricated sliding conditions. In this approach, the lubricant acts as a carrier for a reactive chemical precursor, while the sliding contact functions as a tribochemical reactor that drives in-s…

Abstract To link molecular characteristics and lubrication performance of Organic Friction Modifiers (OFMs), a multi-scale study was carried out to investigate the effects of functional groups and solvents on the tribological properties of two model OFMs, namely palmitic acid and pentadecylamine. It was observed that the solvent composition has a profound effect on the surface adsorption and the …

Abstract This study investigates the fabrication of anisotropic saw-tooth topographies on copper surfaces using direct laser interference patterning (DLIP). By varying the structural periodicity (2, 7.5, and 10 µm) and manufacturing inclination angles (15, 30, and 45°), this work assesses the impact of periodic, deterministic surface topography on tribological performance. Linear reciprocating sl…

Abstract There is a notable deficiency in detailed investigations regarding the impact of abrasive elements on the friction and wear of dental restorations. Therefore, the primary objective of this study was to analyse how abrasive particles in toothpastes affect the friction and wear of dental fillings. The coefficient of friction (CoF) was evaluated as a time course from a brushing simulation c…

Abstract At engineering scales, Amontons–Coulomb friction (with coefficient of friction μ ) and Archard wear (with wear coefficient K ) can be treated as coupled under standard assumptions. Whether this coupling survives downscaling, however, remains unclear. We develop a composite diagnostic, K / μ , that algebraically links Archard’s and Amontons–Coulomb’s forms through K / μ ≈ VH / W , where V…