Results 21 to 30 of about 5,456,955 (188)
Applied Sciences, 2023 Magnetorheological dampers in the service of the medium in a project experience continuous thermal effects, frequent reciprocating shear and other complex conditions.
Yiliang Li, Jiabao Pan, Jin Wang
doaj +1 more source
, 2022 The rheological properties of lithium grease and polyurea grease at different temperatures and consistencies were determined with a rotary rheometer. The plateau moduli of the greases were calculated, and the mechanism of influence of consistency and ...
Pu Zhang +3 more
core +1 more source
Metals, 2023 To improve the service life of the newly designed pneumatic downhole motor, a kind of commercially available lithium complex grease was used to help avoid the rapid wear-induced failure of the dynamic seal of pneumatic downhole tools in operation.
Chenfan Liang +3 more
doaj +1 more source
Influence of Oxidation State on the Catalytic Activity of Iron Catalysts for CO<sub>2</sub> Fixation to Cyclic Carbonates. [PDF]
ChemSusChemAir stable bimetallic iron one‐component systems capable of CO2 cycloaddition to epoxides under 1 bar of pressure of CO2. In this work, one‐component iron catalysts for the atom‐economical reaction of CO2 with epoxides have been used as efficient catalysts for the carbon dioxide cycloaddition into cyclic carbonates in excellent yields.
Caballero MP +10 more
europepmc +2 more sources
Lubricants, 2022 The structure and flow behavior of lubricating greases depend on the base oil and the type and concentration of the dissolved thickener. In this study, the linear viscoelastic properties of greases were characterized by combining oscillatory shear and ...
Annika Hodapp +4 more
doaj +1 more source
Tribological Properties of Al2O3 Nanoparticles as Lithium Grease Additives
, 2021 The tribological properties of Lithium grease specimens with different concentrations of Al2O3 nanoparticles were investigated using a pin on disc apparatus under different sliding speeds and normal loads. Results showed that Al2O3 nanoparticles enhanced
Ahmed Rashed +4 more
core +1 more source
Influence of Li Grease Thickener Types on Film Thicknesses Formed between Smooth and Dented Surfaces
Tribology Online, 2017 The lubricant film thickness behaviors of lithium (Li) thickener type greases and their base oil were investigated for the contact between a glass disk and a smooth/dented steel ball using an optical interferometry. The main focus is to understand grease
Kazumi Sakai +5 more
doaj +1 more source
Lubricants, 2023 Calcium sulfonate complex greases (CSCG) have proven to be a sustainable alternative to lithium complex greases, which still require appropriate additives to deliver lubrication performance benefits under extreme working conditions such as heavy load ...
Shuo Xiang +9 more
semanticscholar +1 more source
Research on Optimization of Friction Performance of Minicar Wheel Bearing Grease
Jixie chuandong, 2022 To explore the effect of grease on the friction performance of minicar wheel bearings, a certain mini car is used as the research object, and the friction torque analysis model of wheel hub bearings is established using SKF rolling bearing calculation ...
Wu Jiang +3 more
doaj
Quasi-Static Rheological Properties of Lithium-Based Magnetorheological Grease under Large Deformation. [PDF]
, 2020 This paper investigates the quasi-static rheological properties of lithium-based magnetorheological (MR) grease under large deformation. Three types of lithium-based MR grease comprising different mass ratios of carbonyl iron (CI) particles and lithium ...
Zhang G, Wang H, Wang J
core +2 more sources