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And since sulfur acts as a lubrication agent in diesel fuel, ultra-low sulfur content in ULSD is thought to be one of the main suspects in causing fuel-related problems in pre-2007 diesels, which ...Web
The numerical simulations are conducted to explain the phenomena of water-based lubrication with ultra-low friction coefficient. The results have showed that: The EDL hydrodynamic and asperity ...Web
Currently, macroscale liquid superlubricity remains limited to low applied loads and typical ceramic friction pairs. In this study, a robust macroscale superlubricity with a coefficient of friction (COF) of approximately 0.006 is realized at the bearing steel interface induced by protic ionic liquids (ILs) in propylene glycol aqueous solution, and the …Web
Mixed and even boundary lubrication often occurs in numerous motion components such as bearings, bushes, gears, piston rings, cylinder liners and so on. ... PI composites filled with Ni exhibit ultra-low friction and wear under boundary and mixed lubrication conditions. 5Ni/PI exhibits the best friction-reducing properties among the …Web
A high-performance low torque lubricant is make or break for ultra-low friction applications. Surprisingly, too much grease can be bad …Web
In this work, superlubricity between glass and Si3N4 surfaces lubricated by mixtures of acid solutions and glycerol solutions has been found by using a traditional tribometer. Ultralow friction coefficients of between 0.004 and 0.006 were obtained after a running-in period. Related experiments indicate that the hydrogen ions in the mixtures play an important …Web
Ultra-low friction of coefficient (0.035) was observed for SLIPS under water lubricating. ... For the sample with 90 min UV irradiation, an ultra-low friction coefficient of 0.018 was observed under water lubrication and its releasing could be detected even after a long period of 768 h. Our results provided a facile method for the future ...Web
Biodiesel is commonly blended with petroleum-derived diesel fuel at a ratio of 5 vol% (B5), which provides the lubricity needed in modern low-sulfur diesel fuels (Hazrat et al. 2015). Increasing ...Web
The formation of an ultra-low friction system was observed for ta-C coated surfaces lubricated with biodiesel containing petrodiesel. The tribosystem was compared to pure petrodiesel and engine ...Web
Reducing frictional power losses through the use of ultra-low viscosity oil is one of the most effective and economical ways. To assess the potential for efficiency enhancement in a new generation of future engines using low-viscosity oils, a technical …Web
Thanks to many great lubrication discoveries, friction coefficients for many sliding systems have been reduced well below 0.1 during the late 2000s. ... Polymer brushes have also been shown to afford ultra-low friction to …Web
In the full film lubrication, liquid lubricant with higher viscous-pressure coefficient would produce more liquid film shear dissipation and increase friction force. Therefore, in the design of liquid superlubricity, the liquid lubrication viscosity would be carefully considered to achieve the excellent lubrication with ultra-low friction.Web
Results showed that the ultra-low friction between the sapphire ball and sapphire substrate lubricated with phosphoric acid was 0.004 at maximum Hertz contact pressure of 1.65 GPa after about 1000 s and it remains steady until the test is completed.Web
Ever since we introduced our ultra-low ash Delo ® 600 ADF, proven to reduce ash buildup in diesel particulate filters (DPFs) by 60%, we've heard a recurring question: how do we manage to meet the performance requirements of a CK-4 heavy …Web
ULV is new territory for the industry at large, and Lubrizol has demonstrated that it can deliver lubricant technology and protection that modern engines are calling for. In the end, Lubrizol's deep market engagement coupled with unmatched testing and …Web
Request PDF | Solution agreement between dry contacts and lubrication system at ultra-low speed | The Reynolds equation has been widely applied in lubrication analyses, but the extent and limit of ...Web
On achieving ultra-low friction and wear, energy efficiency, performance and service life of a mechanical system are greatly extended. Superlubricitive technology is one of the emerging...Web
Since the millennium, drivetrain fluid viscosities have been reduced for better efficiency, but this new challenge is driving them to unprecedented low levels. This paper assesses some of the potential …Web
To explore the mechanism of how TiN coatings achieve an ultra-low friction coefficient under glycerol lubrication, XPS analysis was used to study the chemistry of the tribofilm formed between the TiN coating surface and glycerol during the tribological test. ... Anomalous low friction under boundary lubrication of steel surfaces by polyols ...Web
For the sample with 90 min UV irradiation, an ultra-low friction coefficient of 0.018 was observed under water lubrication and its releasing could be detected even after a long period of 768 h. Our results provided a facile method for the future development of long-term lubricating surfaces which may broaden their applications in fields of anti ...Web
In this paper, a composite model of average flow Reynolds equation with considering electrical double layer (EDL) effect in roughness surface is proposed to analysis aqueous solution lubrication performance. The numerical simulations are conducted to explain the phenomena of water-based lubrication with ultra-low friction …Web
Ultra-low sulfur diesel contains 15 parts per million of sulfur." Diesel fuel retailers are required to document the sulfur content of the fuel they sell. Retailers also will know the type and amount of lubricating additives in the fuel they sell, so farmers can ask their supplier for the sulfur content and additives in the fuel delivered to ...Web
The evolution of µ as a function of the number of rubbings is plotted in Fig. 3. The nanoparticle MoS 2 films show a very low friction coefficient in a dry nitrogen atmosphere ( µ = 0.006). But ...Web
Due to the compatibility of high-efficient and low-cost, chemical exfoliation of graphite is currently a common synthesis method of graphene. ... which is contributed to the super-robust lubrication performances. The ultra-flat nanostructure of UF#G further improves the lubrication by interlayer-sliding effect. This work provides high-quality ...Web
A comprehensive model for water-based liquid lubrication with ultra-low friction is proposed to numerically clarify its mechanism. This study provides unique insights into water-based liquid superlubricity. A deeper numerical investigation is expected to be …Web
Superlubricity, the state of ultralow friction between two sliding surfaces, has become a frontier subject in tribology. Here, a state-of-the-art review of the phenomena and mechanisms of liquid superlubricity are presented based on our ten-year research, to unlock the secrets behind liquid superlubricity, a major approach to achieve superlubricity. An …Web
The greatest lubrication enhancement and surface coverage occur for the spontaneously adsorbed colloids, with ultra-low CoFs of order 10-3 over a large range of speeds. The results demonstrate the potential for hybrid colloids to be used as solvent dispersible "friction modifier additives".Web
