Topic
Lubricant
About: Lubricant is a research topic. Over the lifetime, 25410 publications have been published within this topic receiving 246660 citations. The topic is also known as: lubricating Agents & lubrication Agents.
Papers published on a yearly basis
Papers
More filters
TL;DR: A review of recent tribological studies based on graphene from the nano-scale to macro-scale, in particular, its use as a self-lubricating solid or as an additive for lubricating oils is provided in this paper.
1,064 citations
TL;DR: Alkylimidazolium tetrafluoroborates are promising versatile lubricants for the contact of steel/steel, steel/aluminium, steel/(100), steel/copper, steel’sialon ceramics, Si3N4/SiO2 and steel/Si(100) show excellent friction reduction, antiwear performance and high load-carrying capacity.
922 citations
TL;DR: In this paper, the authors examined the fundamental physico-chemical hydrodynamics that arise when droplets, immiscible with the lubricant, are placed on and allowed to move along these surfaces.
Abstract: Non-wetting surfaces containing micro/nanotextures impregnated with lubricating liquids have recently been shown to exhibit superior non-wetting performance compared to superhydrophobic surfaces that rely on stable air–liquid interfaces. Here we examine the fundamental physico-chemical hydrodynamics that arise when droplets, immiscible with the lubricant, are placed on and allowed to move along these surfaces. We find that these four-phase systems show novel contact line morphology comprising a finite annular ridge of the lubricant pulled above the surface texture and consequently as many as three distinct 3-phase contact lines. We show that these distinct morphologies not only govern the contact line pinning that controls droplets' initial resistance to movement but also the level of viscous dissipation and hence their sliding velocity once the droplets begin to move.
829 citations
TL;DR: In this article, hollow nanoparticles (HNs) of metal dichalcogenides MX2 have been used as solid lubricants to reduce wear in situations where the use of liquid lubricants is either impractical or inadequate, such as in vacuum, space technology or automotive transport.
Abstract: Solid lubricants fill a special niche in reducing wear in situations where the use of liquid lubricants is either impractical or inadequate, such as in vacuum, space technology or automotive transport. Metal dichalcogenides MX2 (where M is, for instance, Mo or W and X is S or Se) are widely used as solid lubricants. These materials are characterized by a layered structure with weak (van der Waals) inter-layer forces that allow easy, low-strength shearing1,2. Within the past few years, hollow nanoparticles (HNs) of MX2 with structures similar to those of nested carbon fullerenes and nanotubes have been synthesized3,4. Here we show that these materials can act as effective solid lubricants: HN-WS2 outperforms the solid lubricants 2H-MoS2 and 2H-WS2 in every respect (friction, wear and lifetime of the lubricant) under varied test conditions. We attribute the outstanding performance of HN-WS2 to its chemical inertness and the hollow cage structure, which imparts elasticity and allows the particles to roll rather than to slide.
779 citations
TL;DR: In this paper, the basic mechanism of vegetable oil autoxidation is presented, along with methods used to monitor and analyse the products of oxidation, and the potential impact of such oxidation products on lubrication performance is discussed.
641 citations