Results 1 to 10 of about 683 (99)

In-situ catalysis of green lubricants into graphitic carbon by iron single atoms to reduce friction and wear [PDF]

open access: yesNature Communications
Reducing friction and wear in moving mechanical systems is essential for their intended functionality. This is currently accomplished by using a large variety of anti-friction and anti-wear additives, that usually contain sulfur and phosphorous both of ...
Wei Song   +9 more
doaj   +2 more sources

Evaluation of Mechanical Characteristics of Tribofilm Formed on the Surface of Metal Material Due to Friction under Lubrication with Automatic Transmission Fluid

open access: yesTribology Online, 2021
In this study, nano-scratch tests were conducted using atomic force microscope (AFM) to clarify the hardness of a tribofilm derived from an additive (Fluid A or Fluid B in automatic-transmission fluid) formed on an SKS3 cold work tool steel substrate ...
Takayuki Tokoroyama   +8 more
doaj   +1 more source

Wear mechanism and evolution of tribofilm of ceramic on steel pairs under ester oil lubrication in wide temperature range

open access: yesJournal of Materials Research and Technology, 2023
The ceramic-steel-pentaerythritol ester system has a broad application prospect under high temperature conditions, which are respectively in the fields of aviation, aerospace and advanced equipment manufacturing. However, a comprehensive understanding of
Lvzhou Li   +7 more
doaj   +1 more source

Temperature dependence of molybdenum dialkyl dithiocarbamate (MoDTC) tribofilms via time-resolved Raman spectroscopy

open access: yesScientific Reports, 2021
Molybdenum dialkyl dithiocarbamate (MoDTC) is a friction reducing additive commonly used in lubricants. MoDTC works by forming a low-friction molybdenum disulphide (MoS2) film (tribofilm) on rubbed surfaces.
Carlos E. Garcia   +3 more
doaj   +1 more source

Synthesis of ultrathin two-dimensional metal-organic framework nanosheets for lubricant additives

open access: yesMaterials & Design, 2022
Two-dimension (2D) nano materials are diffusely employed as lubricant additives. In this paper, three kinds of ultrathin 2D metal-organic framework (MOF) nanosheets with different metal ions (Ni2+, Zn2+, and Cu2+) were successfully synthesized by ...
Hongxiang Yu   +7 more
doaj   +1 more source

ZDDP Tribofilm Formation on Non-Ferrous Surfaces

open access: yesTribology Online, 2020
The current trend for using lower viscosity lubricants with the aim of improving fuel economy of mechanical systems means that machine components are required to operate for longer periods in thin oil film, boundary and mixed lubrication conditions ...
Mao Ueda, Amir Kadiric, Hugh Spikes
doaj   +1 more source

Mechanisms behind the environmental sensitivity of carbon fiber reinforced polytetrafluoroethylene (PTFE)

open access: yesFriction, 2023
Carbon fiber reinforced polytetrafluoroethylene (CF/PTFE) composites are known for their exceptional tribological performance when sliding against steel or cast iron in inert gas environments.
P. Johansson   +3 more
doaj   +1 more source

Molecular dynamics simulation of the Stribeck curve: Boundary lubrication, mixed lubrication, and hydrodynamic lubrication on the atomistic level

open access: yesFriction, 2023
Lubricated contact processes are studied using classical molecular dynamics simulations for determining the entire range of the Stribeck curve. Therefore, the lateral movement of two solid bodies at different gap height are studied. In each simulation, a
Simon Stephan   +3 more
doaj   +1 more source

Scuffing failure analysis based on a multiphysics coupling model and experimental verification

open access: yesFriction, 2023
General reductions in lubricant viscosities and increasing loads in machine components highlight the role of tribofilms in providing surface protection against scuffing. However, the relationship between the scuffing process and the growth and removal of
Bugao Lyu   +4 more
doaj   +1 more source

A Study on the Tribofilm Growth and Tribological Properties of Tribofilms Formed from Zinc Dialkyl Dithiophosphate (ZDDP) and Molybdenum Dialkyl Dithiocarbamate (MoDTC)

open access: yesTribology Online, 2018
Tribofilms are critical for the management of wear and the control of friction. This study focused on the tribological properties of tribofilms to clarify their antiwear and low-friction mechanisms.
Renguo Lu   +4 more
doaj   +1 more source

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