Results 21 to 30 of about 138,734 (308)

Synergistic Tribological Performance of Phosphorus- and Sulfur-Based Extreme Pressure and Anti-Wear Additives

Lubricants
Higher demands on extreme pressure lubrication performance are posed by stringent working conditions. In this study, the synergistic tribological properties of phosphate ammonium salt in combination with active sulfurized olefin (S1) and non-active ...
Jingyu Wang, Jinhua Zheng, Jun Wang, Xiao Yao, Xing Xiong, Haipeng Huang   +5 more
doaj   +1 more source

Tribological Investigation of the Effect of Nanosized Transition Metal Oxides on a Base Oil Containing Overbased Calcium Sulfonate

Lubricants, 2023
In this study, copper(II) oxide, titanium dioxide and yttrium(III) oxide nanoparticles were added to Group III-type base oil formulated with overbased calcium sulfonate. The nanosized oxides were treated with ethyl oleate surface modification.
Álmos Dávid Tóth, Hajnalka Hargitai, Ádám István Szabó   +2 more
doaj   +1 more source

Structure–Performance Relationship Study of PMA Viscosity Index Improver in New Energy Vehicle Transmission Fluid

Lubricants
This study systematically investigates the structure–performance relationship of PMA (PolyMethacrylate) viscosity index improvers in new energy vehicle (NEV) transmission fluids. We developed an integrated analytical framework combining spectroscopic and
Jinglin Yin, Xiao Shi, Ling Lei, Jingsi Cao, Qianhui Zhao, Haipeng Zhao   +5 more
doaj   +1 more source

Change in Surface Tension and Pin Wear Characteristics of Thin-Film Disks by Heat Treatment and UV Irradiation

Tribology Online, 2010
The lubricant on thin-film disks is a key material for disk durability. Bonded lubricant layer remains on disk surfaces after solvent rinsing which removes mobile lubricant.
Youichi Kawakubo, Masaki Kamijou, Toshihito Hiraide, Osamu Kitamura   +3 more
doaj   +1 more source

Surface Modification of Silica Nanoparticles with Ethyl Oleate for the Purpose of Stabilizing Nanolubricants Used for Tribological Tests

Ceramics, 2023
Long-term sustainability and decreasing amount of fossil oil reserves require a partial or complete transformation of traditional lubricating oils. The use of silica nanoparticles as a lubricant additive has a huge tribological potential, which has ...
Álmos Dávid Tóth, Nóra Mike-Kaszás, Gábor Bartus, Hajnalka Hargitai, Ádám István Szabó   +4 more
doaj   +1 more source

Bearings use dry self-lubricating cage materials [PDF]

, 1968
Rolling element bearings in spacecraft mechanical systems use solid lubricant composites of polytetrafluoroethylene in the bearing cage which functions as the lubricant reservoir. The cage spaces the rolling elements equally and provides the lubricant at
Anderson, W. J., Glenn, D. C., Scribbe, H. W.   +2 more
core   +1 more source

Static friction on the fly: velocity depinning transitions of lubricants in motion

, 2007
The dragging velocity of a model solid lubricant confined between sliding periodic substrates exhibits a phase transition between two regimes, respectively with quantized and with continuous lubricant center-of-mass velocity.
A. Vanossi, E. Tosatti, F. Caruso, G. E. Santoro, N. Manini, O. M. Braun   +5 more
core   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Study on the Heat Pipe Oxidation Deposits of Ethylene⁃Propylene Copolymer

Shiyou huagong gaodeng xuexiao xuebao
With the continuous rise of energy conservation and environmental protection standards, optimizing the high temperature cleaning performance of lubricating oil and reducing engine piston deposits have become a top priority in the field of lubricating oil.
Hongjun E, AHEBOTA·Bahet, Si WU, Jiajia JIN   +3 more
doaj   +1 more source

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

Advanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source