Results 21 to 30 of about 3,603 (225)
Film Thickness and Friction of ZDDP Tribofilms [PDF]
Tribology Letters, 2019 Tribofilm formation by several zinc dialkyl- and diaryldithiophosphate (ZDDP) solutions in thin film rolling-sliding conditions has been investigated. A primary, a secondary alkyl and a mixed alkyl ZDDP show similar rates of film formation and generate films typically 150 nm thick.
Joanna Dawczyk +3 more
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Tribofilms Forming in Oil-Lubricated Contacts [PDF]
Lubricants, 2016 The subject of the present paper is the characterization of third bodies of run-in systems. By means of continuous friction and wear measurement, lubricated steel-steel and steel-aluminum contacts were evaluated. Microstructure, chemical composition and response of the materials to shear were analyzed by XPS/AES and focused ion beam technique.
Matthias Scherge +2 more
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Scuffing failure analysis based on a multiphysics coupling model and experimental verification
Friction, 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
On the mechanism of ZDDP antiwear film formation [PDF]
, 2016 Zinc dialkyldithiophosphate additives are used to control wear and inhibit oxidation in almost all engine oils as well as many other types of lubricant. They limit wear primarily by forming a thick, protective, phosphate glass-based tribofilm on rubbing ...
Spikes, HA, Zhang, J
core +1 more source
On the Crystallinity and Durability of ZDDP Tribofilm [PDF]
Tribology Letters, 2019 Abstract 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, mixed lubrication conditions, where the risk of surface damage is increased. Consequently, the performance and durability of
Ueda, M, Kadiric, A, Spikes, H
openaire +3 more sources
Tribology 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
Effect of Sliding on the Relation of Tribofilm Thickness and Wear
Lubricants, 2023 The formation of tribofilms depends on temperature, shear stress, availability of the related chemical components, and characteristics of the near surface region, e.g., roughness and surface chemistry.
Martin Jech +4 more
doaj +1 more source
Superlubricity mechanism of diamond-like carbon with glycerol. Coupling of experimental and simulation studies [PDF]
, 2007 We report a unique tribological system that produces superlubricity under boundary lubrication conditions with extremely little wear. This system is a thin coating of hydrogen-free amorphous Diamond-Like-Carbon (denoted as ta-C) at 353 K in a ta-C/ta-C ...
De Barros Bouchet, M. I. +8 more
core +1 more source
Tribology Online, 2019 To improve the transmission efficiency of a continuously variable transmission (CVT) system, it is effective to form a tribofilm with higher friction coefficient.
Ayako Omura +8 more
doaj +1 more source
Lubricants, 2023 This work investigates the influence of altered engine oil on the tribological performance, focusing in particular on wear and interconnected tribofilm formation.
Martin Jech +4 more
doaj +1 more source