... of carbonaceous film is derived from two parts. On the one hand, it comes from short hydrocarbon chains and amorphous carbon formed by the dehydrogenation and cracking of alkyl chains. On the other hand, it comes from the ordered graphite of MSH-C. We used molecular dynamic simulation to study the adsorption...

... 02 07 2024 02 07 2024 05 08 2024 Graphical Abstract Figure sulfur- and phosphorus-free organic molybdenum tribological properties tribochemistry films friction lubricant additives wear wear mechanisms In order to increase the fuel economy and elongate...

... 04 2024 Graphical Abstract Figure piston skirt solid lubricant coatings ZDDP friction and wear tribofilm films lubricant additives solid lubricants wear mechanism The marine diesel engine, as the primary power system for the shipping industry, is facing...

... was adopted to determine the film distribution of the oil reservoir and the layer thickness of the oil ridges on the free surface. It clearly depicts the changes in the oil reservoir and reveals the mechanism of the oil reflow surrounding the contact region under various driving actions. The results may give...

..., approximately 2.0 µm thick, were formed through controlled anodization and annealing, composed of Ti and Nb oxides. The compact oxide film at the nanotube/substrate interface provided corrosion resistance, lubricating properties in worn tracks, and improved wear resistance. The nanotubes exhibited a lower...

... piezoelectric servo valve hydraulic pipeline fluid force control characteristics films fluid film lubrication Hydraulic servo valves can provide continuous flow change according to the input signal by using a sliding valve and controlling the valve through the feedback signal generated by internal...

...Yiming Han; Petr Sperka; Jing Wang; Ivan Krupka; Martin Hartl; Weimin Li; Xiaobo Wang; Weimin Liu The influence of the grease-water two-phase emulsion on the bearing tracks on the film formation has been studied by carrying out optical interferometry experiments on a ball disk test rig to observe...

... between the lubricating angle and sliding angle is made clear, and the lubricating angle is recommended to determine the lubricating weak point. The kinematic-geometric coefficient of oil film thickness is proposed to evaluate preliminarily the lubricating characteristics of the gear drive. This theory...

... years, many chemicals were screened for evaluating the bonding strength on silver surfaces. Finally, a mono-octadecanethiol (ODT) film was solidly bonded with silver surfaces in the laboratory utilizing an ultrasonic bath. To apply this technology for industry, the process must be tested in a real...

... on preferential load support by fillers. Recent studies found that tribochemical polarization of PTFE could trigger the formation of highly protective transfer films, thus resulting in exceptionally low wear-rates (k ∼ 10 −7 mm 3 /Nm) in certain composites. Although tribochemical interactions were believed...

..., and machining roughness. The distribution of the center film thickness of the LSR gear along the meshing line was predicted through an example the result of which was compared with a typical line contact EHL formula to verify the model. In addition, the difference was investigated in film thickness distribution...

... . 20 06 2021 08 09 2021 08 09 2021 08 02 2022 hydrostatic lead screw lubrication misalignment transmission performance films fluid film lubrication hydrodynamic lubrication hydrostatic lubrication National Natural Science Foundation of China 10.13039...

... shows that, with consideration of texture effect, the friction torque of the bearing is reduced, there exists an optimal texture parameter for a given film thickness, under which the bearing has the maximum load-carrying capacity, no obvious change rule is found for the volume flowrate...

... coatings contact area dry friction films hardness sliding surface layers surface properties and characterization surfaces tribological systems wear Coatings have been employed in systems subject to sliding contact with good results [ 1 ], especially when a high hardness is required...

..., this means thinning lubricating films between the meshing gears and ultimately a breakdown of the film. If sufficient cooling is achieved by excessive use of cooling oil, additional losses and a penalty on the efficiency gained by the geared turbofan design are inevitable. The design challenge above...

...-varying load force and dynamic coefficients of the hybrid guideway in one reciprocation are calculated. Afterward, in Sec. 4 , the load-guideway system on the normal direction is simplified as a single-degree-of-freedom (DOF) linear time-varying (LTV) system. The system's film thickness and normal...

...Zhaoli Liu; Hang Li; Jianliang Li; Jiewen Huang; Jian Kong; Dangsheng Xiong In this study, the Mo-alloyed HfN films were prepared by DC-magnetron sputtering and studied their tribological properties at 25–600 °C under dry friction conditions. The relationship between H/E value and tribological...

... films friction hardness lubricant additives lubricants surface layers surface properties and characterization surface treatments tribological systems wear Hydraulic systems are hindered by inefficiencies of up to 15% from components such as hydraulic motors and pumps [ 1 ]. Seizure...

...Sudesh Singh; Xinchun Chen; Chenhui Zhang; Rakesh Kumar Gautam; Rajnesh Tyagi; Jianbin Luo To explore the potential of directly grown multi-layer graphene as an agent in reducing friction and wear of steel on steel tribo-pair, multi-layer graphene films were synthesized on GCr15 steel in a low...

...Michael Branagan; Neal Morgan; Christopher Goyne; Roger Fittro; Robert Rockwell; Minhui He To compensate for an extremely heavy journal, jacking pockets can be added to the surface of pads in fluid film bearings. Jacking pockets can range in size and shape and will have an influence...