Results 31 to 40 of about 581 (170)

Molecular behaviors in thin film lubrication—Part three: Superlubricity attained by polar and nonpolar molecules

Friction, 2018
In thin-film lubrication (TFL), generally, the viscosity of the lubricant and its coefficient of friction (CoF) increase. Finding a method to reduce the CoF in TFL is a significant challenge for tribologists.
Xiangyu Ge, Tobias Halmans, Jinjin Li, Jianbin Luo   +3 more
doaj   +1 more source

Robust microscale structural superlubricity between graphite and nanostructured surface

Nature Communications, 2023
Structural superlubricity is a state of nearly zero friction and no wear between two contacted solid surfaces. However, such state has a certain probability of failure due to the edge defects of graphite flake.
Xuanyu Huang, Tengfei Li, Jin Wang, Kai Xia, Zipei Tan, Deli Peng, Xiaojian Xiang, Bin Liu, Ming Ma, Quanshui Zheng   +9 more
doaj   +1 more source

Role of surface roughness in superlubricity [PDF]

Journal of Physics: Condensed Matter, 2006
11 pages, 17 figures, format ...
Tartaglino, Ugo, Samoilov, Vladimir N., Persson, Bo N. J.   +2 more
openaire   +3 more sources

Progress in Superlubricity Across Different Media and Material Systems—A Review

Frontiers in Mechanical Engineering, 2022
Superlubricity is a terminology often used to describe a sliding regime in which the adhesion leading to friction or resistance to sliding literally vanishes.
Aditya Ayyagari, Kazi Istiaque Alam, Diana Berman, Ali Erdemir   +3 more
doaj   +1 more source

Atomistics of superlubricity [PDF]

Friction, 2014
Abstract Friction is a phenomenon observed ubiquitously in daily life, yet its nature is complicated. Friction between rough surfaces is considered to arise primarily because of macroscopic roughness. In contrast, interatomic forces dominate between clean and smooth surfaces.
openaire   +1 more source

Observation of Microscale Superlubricity in Graphite [PDF]

Physical Review Letters, 2012
Upon shearing a microscale lithographically defined graphite mesa, the sheared section retracts spontaneously to minimize interface energy. Here, we demonstrate a sixfold symmetry of the self-retraction and provide a first experimental estimate of the frictional force involved, as direct evidence that the self-retraction is due to superlubricity, where
Ze, Liu, Jiarui, Yang, Francois, Grey, Jefferson Zhe, Liu, Yilun, Liu, Yibing, Wang, Yanlian, Yang, Yao, Cheng, Quanshui, Zheng   +8 more
openaire   +2 more sources

Facile fabrication and tribological properties of self-lubricating polyurethane based on expanded graphite/paraffin for water lubricated bearings

Journal of Materials Research and Technology
To improve the tribological properties of polyurethane (PU) based water-lubricated bearings specifically under severe conditions, expanded graphite/paraffin (EG/paraffin) is synthesized as self-lubricating additives and incorporated into the polyurethane
Jiangbo Li, Wenli Zhang, Zijian Tang, Tao Hu, Xiaolei Li, Wei Wu, Chenhui Zhang   +6 more
doaj   +1 more source

Superlubricity of graphene nanoribbons on gold surfaces [PDF]

Science, 2016
A golden opportunity for graphene Reducing friction can limit wear and improve the energy efficiency of mechanical devices. Graphene is a promising lubricant because the friction between sheets is minuscule under certain circumstances. Kawai et al.
Kawai, Shigeki, Benassi, Andrea, Gnecco, Enrico, Soede, Hajo, Pawlak, Remy, Feng, Xinliang, Muellen, Klaus, Passerone, Daniele, Pignedoli, Carlo A., Ruffieux, Pascal, Fasel, Roman, Meyer, Ernst   +11 more
openaire   +7 more sources

Water molecules on the liquid superlubricity interfaces achieved by phosphoric acid solution

Biosurface and Biotribology, 2018
The superlubricity mechanism of phospholipid molecules on biological surfaces and interfaces has been receiving much attention. Since the superlubricity can be achieved with a phosphoric acid aqueous solution, the interaction of the phosphate group with ...
Yuan Gao, Liran Ma, Yong Liang, Bohong Li, Jianbin Luo   +4 more
doaj   +1 more source

Torque and Twist against Superlubricity

Physical Review Letters, 2008
Superlubricity between incommensurate surfaces provides a desired low-friction state essential for the function of small-scale machines. Here we demonstrate experimentally and theoretically that superlubricity in contacts lubricated by lamellar solids might be eliminated due to torque-induced reorientation coupled to lateral motion.
Filippov, D.V., Dienwiebel, M., Frenken, J.W.M., Klafter, J., Urbakh, M.   +4 more
openaire   +6 more sources