The Application of Nano-MoS2 Quantum Dots as Liquid Lubricant Additive for Tribological Behavior Improvement

Abstract

Molybdenum disulfide quantum dots (MoS2 QDs) are a promising lubricant additive for enhanced engine efficiency. In this study, MoS2 QDs were used as lubricating oil additives for ball-on-disc contact and had adequate dispersity in paroline oil, due to their super small particle size (~3 nm). Tribological results indicate that the friction coefficient of paroline oil with 0.3 wt.% MoS2 QDs reached 0.061, much lower than that of pure paroline oil (0.169), which is due to the formation of a stable tribo-film formed by the MoS2, MoO3, FeS, and FeSO4 composite within the wear track. Synergistic lubrication effects of the tribo-film and ball-bearing effect cooperatively resulted in the lowest friction and wear.

Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

“…Research in this area has looked for ways to increase the wear resistance of solid lubricant coatings at different contact loads and over a relatively wide range of temperatures and air humidity. Moreover, researchers have sought to find fundamentally new forms/structural states that can lead to new properties [11][12][13][14]. The testing temperature range has been, as a rule, between room temperature and~500 • C. In most cases, coatings were applied through ion (magnetron) sputtering [10][11][12].…”

Tribological performance of nano-diamond composites-dispersed lubricants on commercial cylinder liner mating with CrN piston ring

“…The elemental analysis of black sediments reveals that the main element of black sediments is C (Figure 8(b)). It is well known that C element can be resulted from the carbon deposition due to the combustion of furl or lubricating oil, but it has been reported that the occurrence of carbon deposition needs a temperature higher than 300℃ [45]. As the test was performed at the temperature of 150℃, it is considered that the observed black sediments mainly come from the ND composite.…”

Characteristics Biolubricant Enriched with Nanoparticle Additives: a Review

“…The results of the wear test research can be seen in Figure 3. The graph shows the same trendline as Figure 2, namely the greater the viscosity value of a lubricant, the lower the wear value [16][17][18][19][20][21].…”

“…Table 1. Variations in viscosity and coefficient of friction and wear rates [16][17][18][19][20][21] Research on the correlation between the viscosity of 100 O C (cSt) and the coefficient of friction (coF) can be seen in Figure 2. The graph shows that the greater the viscosity value of a lubricant causes the lower friction coefficient value.…”