Results 141 to 150 of about 53,471 (296)

Lubrication and Lubricants [PDF]

Nature, 1920
openaire   +1 more source

Shear‐Induced Emergence of Aromatic Superlow‐Friction Interfaces in Amorphous Carbon: Triggering Chemical Impurities and Atomic‐Scale Mechanisms

Advanced Science, EarlyView.
High‐throughput quantum‐mechanical simulations reveal that amorphous carbon undergoes shear‐driven structural transformation into aromatic, graphene‐like interfaces. This mechanochemical process is governed by dopant chemistry: dopants with valency less than four promote the emergence of superlow‐friction amorphous graphene, whereas tetra‐valent ...
Takuya Kuwahara, Koki Horiguchi, Leonhard Mayrhofer, Gianpietro Moras, Michael Moseler   +4 more
wiley   +1 more source

A Piezo‐Mimetic Ionic Hydrogel Harnessing Joint Motion for Cartilage Repair

Advanced Science, EarlyView.
A piezo‐mimetic ionic hydrogel converts mechanical deformation into bioactive ionic currents via stress‐induced asymmetric ion migration. Coupled with sustained Mg2+ release, this mechano‐electrochemical platform bridges mechanical loading and cellular signaling, enabling load‐adaptive stimulation and enhanced cartilage regeneration. ABSTRACT Articular
Chenyuan Gao, Xinyu Wang, Zhifeng Wu, Xinya Zhang, Xiao Geng, Ti Zhang, Yue Wang, Hongwei Xia, Jun Zhang, Xianbo Qiu, Cuiru Sun, Yingjie Yu, Wenli Dai, Hua Tian, Qing Cai   +14 more
wiley   +1 more source

Methodology for measurement of lubricant decay rate for rail lubricants

, 2008
A tribologist's dream is to predict the point at which a lubricant film will fail. The\ud precursor to this ideal situation is to predict the decay behaviour of a lubricant film prior to failure.
Clegg, Richard E., Hargreaves, Douglas J., Wilson, Lance J., Powell, John, D Hargreaves (9862427), J Powell (7598840), Richard Clegg (9787673), L Wilson (9873608)   +7 more
core  

Mastication‐Induced Electrical Stimulation Activates Prg4+ Chondroprogenitors for Osteoarthritis Therapy

Advanced Science, EarlyView.
This study presents a ″trash‐to‐treasure″ strategy that converts harmful joint overloads into beneficial electrical cues. The biodegradable MagPie, by providing piezoelectrical stimulation and releasing Mg2+ during mastication, exerts synergistic pro‐regenerative and anti‐inflammatory effects on Prg4+ cells via the ECM‐mediated FAK‐PI3K‐Akt axis ...
Shi‐Yang Feng, Jing‐Rong Cheng, Yu Qin, Jie Lei, Chen‐Chen Gao, Hong‐Ying Fu, Li‐Ping Wu, Thanh D. Nguyen, Xu‐Liang Deng, Kai‐Yuan Fu, Yang Liu   +10 more
wiley   +1 more source

Stability analysis of hydrodynamic journal bearings with variable axial geometrical configuration using titanium dioxide nanoparticles as lubricant additives. [PDF]

Sci Rep
Awad H, Saber E, Abdou KM, Dajani S.
europepmc   +1 more source

Lubrication and Lubricating Oils

Journal of the Society of Mechanical Engineers, 1918
openaire   +1 more source

Hierarchical Twin Networks Enable Exceptional Strength and Fracture Toughness in Titanium

Advanced Science, EarlyView.
A commercial‐purity titanium with hierarchical ultrafine twin structures delivers an exceptional combination of fracture toughness (KJIc) of 187 MPa·m1/2 and specific yield strength of 140 MPa·cm3·g−1, in which pre‐engineered high‐density twin boundaries stimulate massive and dislocations to blunt crack tip.
Xiao‐Wei Zou, Ting Zhu, En Ma, Wei‐Zhong Han   +3 more
wiley   +1 more source

Lubricant inerting

The recent development of nitrogen concentrators that can filter a stream of almost pure nitrogen from air now makes it practicable to operate closed lubrication systems in an inert atmosphere to limit lubricant oxidation during use – so called ...
Spikes, Hugh, Leung, Minnie, Zhang, Jie, Wong, Janet   +3 more
core   +1 more source

Structural, Thermal Behaviour and Tribological Performance in Cold Rolling of Mineral Lubricants with Graphene Nanoplatelets Functionalized with Oleic Acid. [PDF]

Nanomaterials (Basel)
Özakın B, Gültekin K.
europepmc   +1 more source