Results 41 to 50 of about 808 (186)

Better Together: Photoredox/Copper Dual Catalysis in Atom Transfer Radical Polymerization

Angewandte Chemie, Volume 137, Issue 2, January 10, 2025.
A combination of Cu‐ATRP catalysis with photocatalysts (PCs) that absorb visible and/or NIR light exhibits synergistic action at the ppm/ppb concentration level. It leads to very well‐defined polymers with rates depending on the amount and quantum efficiency of PC but controlled polymer architecture defined by the Cu‐catalysts.
Julian Sobieski, Adam Gorczyński, Arman Moini Jazani, Gorkem Yilmaz, Krzysztof Matyjaszewski   +4 more
wiley   +2 more sources

Galvanically induced potentials to enable minimal tribochemical wear of stainless steel lubricated with sodium chloride and ionic liquid aqueous solution

Friction, 2018
The effect of galvanically induced potentials on the friction and wear behavior of a 1RK91 stainless steel regarding to tribocorrosion was investigated using an oscillating ball-on-disk tribometer equipped with an electrochemical cell.
Tobias Amann, Felix Gatti, Natalie Oberle, Andreas Kailer, Jürgen Rühe   +4 more
doaj   +1 more source

Architected Multi‐Phase Structure of CoNiTa Compositionally Complex Alloy for Synergistic Strength and Wear Resistance

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT CoNi‐based compositionally complex alloys (CCA), such as CoNiV, are recognized for their remarkable mechanical properties, especially with excellent wear resistance, becoming increasingly essential for ensuring their stability in demanding operational environments.
Jing Liang, Peng Gao, Jiongchong Fang, Junqiang Li, Qian He, Fengchao An, Wenjun Lu, Guosong Zeng   +7 more
wiley   +1 more source

Investigation of the effect of humidity on the wear of cobalt metal

Friction
Cobalt-based (Co-based) alloys are widely used in aerospace and machinery applications because of their excellent mechanical properties, where extraordinary wear performance is also desirable to ensure stable operation.
Peng Gao, Jing Liang, Zhenghao Wei, Jiongchong Fang, Zhongdu He, Wei Wu, Haifeng Gao, Guosong Zeng   +7 more
doaj   +1 more source

On the Friction and Wear Mechanisms of Electrified Steel Contacts in CO2: Unveiling the Role of Carbon‐Rich Tribofilms Under Dry Sliding Conditions

Advanced Materials Interfaces, Volume 13, Issue 14, 21 July 2026.
This study investigates friction and wear of AISI 52100 steel under dry sliding in CO2, air, and N2 atmospheres, with and without contact electrification. CO2 forms a stable carbon‐rich tribofilm that reduces friction by ∼30% and wear by ∼85%. High‐resolution TEM, EELS, and molecular dynamics reveal pressure‐dependent lubrication mechanisms, showing ...
Julio A. Cao‐Romero‐Gallegos, Seungjoo Lee, Cagatay Yelkarasi, Leonardo I. Farfan‐Cabrera, Ryuichi Okamoto, Hitoshi Washizu, Ali Erdemir   +6 more
wiley   +1 more source

Superlubricity and tribochemistry of polyhydric alcohols [PDF]

Physical Review B, 2008
The anomalous low friction of diamondlike carbon coated surfaces lubricated by pure glycerol was observed at 80 °C. Steel surfaces were coated with an ultrahard 1 µm thick hydrogen-free tetrahedral coordinated carbon (ta-C) layer produced by physical vapor deposition.
Matta, C., Joly-Pottuz, Lucile, De Barros Bouchet, Maria-Isabel, Martin, J.M., Kano, M., Zhang, Qing, Goddard, W.A.   +6 more
openaire   +3 more sources

A Severity Threshold for Frictional Stability in ZrB₂SiC/ZrO₂ Coatings: Implications for Tool Life in Titanium Machining

Solids
Ultra-high-temperature ceramic (UHTC) coatings offer a promising route to extending cutting tool service life under severe conditions. This work evaluates the tribological behaviour and wear regime transitions of ZrB2–SiC/ZrO2 coatings, deposited by ...
Willian Aperador, Giovany Orozco-Hernández, Julio Cesar Caicedo   +2 more
doaj   +1 more source

Modelling Tribochemical Reactions of Lubricants in the UHV Analytical Tribometer

Tribology Online, 2015
Gas Phase Lubrication (GPL) is used here to lubricate counterparts of a tribological system with a partial pressure of a gas. Because the rheological contribution (Hydrodynamic and EHL) of gas is practically negligible, the role of tribochemical ...
Maria Isabel De Barros-Bouchet, Jean-Michel Martin, David Philippon, Christine Matta, Thierry Le Mogne, Matthieu Boehm   +5 more
doaj   +1 more source

2D Nanomaterials Toward Function‐Ready Superlubricity in Advanced Microsystems

Advanced Materials, Volume 38, Issue 27, 14 May 2026.
A unified framework links structural and transformation superlubricity with microsystem functions and deployment requirements. Mechanisms, device architectures, integration strategies, AI‐guided discovery, and benchmarking protocols are connected to define function‐ready superlubricity in advanced microsystems.
Yushan Geng, Jun Yang, Yong Yang
wiley   +1 more source

Kinetic Study on Lubricity of MoDTC as a Friction Modifier

Tribology Online, 2019
The temperature dependence of friction coefficient of lubricant oils containing MoDTC was evaluated using a ball on disk tribometer at constant temperatures of 25, 40, 60 and 80°C.
Masanori Komaba, Shinya Kondo, Atsushi Suzuki, Kazue Kurihara, Shigeyuki Mori   +4 more
doaj   +1 more source