Stability, Dynamics, and Lubrication of MoS₂ Platelets and Nanotubes

Abstract

A model is introduced to investigate structure, stability, dynamics, and properties of MoS(2). The tribological behavior of the material is obtained from the autocorrelation function, ACF, of the forces, using the Green-Kubo equation, and by the classical Amontons' laws. In the idealized system, i.e. without defects, junctions, vacancies, asperities, and impurities, both models find a superlubrication regime, in agreement with some experiments. In nanotubes, NTs, friction is an order of magnitude lower than in the layered systems. The calculations also show that there is a substantial stabilization, per atom, for the formation of multiwall NTs with at least four walls.

Formation of an adsorption film of MoS2 nanoparticles and dioctyl sebacate on a steel surface for alleviating friction and wear

“…All the chemical reagents used in this work were analytical grade, including Na 2 MoO 4 Á 2H 2 O, thioacetamide (TAA), hydrochloric acid (HCl), ethanol, and dioctyl sebacate (DOS, C 26 ϕ10 mm, 3 mm in thickness, GCr15 steel, 190-210 HV30 in hardness, 0.014 um in surface roughness) was provided by the Jinan YiHua Tribology Testing Technology Co., Ltd., China.…”

“…With advanced chemical techniques, MoS 2 with these novel morphologies has been synthesized [14][15][16][17][18]. The applications of spherical IF-MoS 2 [19][20][21][22] and MoS 2 nanotubes [23][24][25][26] also enrich the lubricating mechanisms of solid lubricants.…”

Lubrication performance of MoS2 and SiO2 nanoparticles as lubricant additives in magnesium alloy-steel contacts

“…Furthermore, it is well known that MoS 2 nanoparticles are among the most common lubricant additive due to a layered and two-dimensional structure with weak van der Waals forces between its molecular layers and strong interlayer covalent bonds. Its efficacy for tribological applications was demonstrated in many reports [12][13][14]. Previous studies revealed that the lubrication performance of MoS 2 nanoparticles was not only dependent on quantity, the morphology, size and crystal structure but also the contact surfaces [15,16].…”

Evolution of damage in MoS 2 -based dry film lubricants (DFLs) in fretting wear—The effect of DFL thickness and contact geometry

“…Molybdenum disulphide (MoS2) is widely used as a dry film solid lubricant [6,11] due to its laminar hexagonal structure which results in low coefficients of friction being observed [12,13]; in many industrial sectors, the MoS2 is often applied to a surface as a coating in the form of MoS2 particles in a polymeric binder [14] (although MoS2 can be utilized as a low friction material in a wide range of forms [15][16][17][18][19]). In the case of a polymer loaded with MoS2 particles, the coating is often applied on top of a metallic bond layer (typically Cu-Ni-In) [20] which is itself deposited onto the component surface by thermal spraying.…”