Results 31 to 40 of about 2,082 (212)

Revealing the interface nature of ZDDP tribofilm by X-ray photoelectron spectroscopy and atom probe tomography [PDF]

, 2020
Purpose To decrease wear and friction, zinc dialkyldithiophosphate (ZDDP) has been used in engine oil for several decades, but the mechanism of the tribofilm formation is still unclear. The purpose of this study is to characterize the chemical details of
Stratmann, Andreas, Stratmann, Andreas,, Mücklich, Frank, Muecklich, Frank,, Hsu, Chia-Jui, Barrirero, Jenifer, Jacobs, Georg, Kopnarski, Michael, Muecklich, Frank, Gachot, Carsten,, Aboulfadl, Hisham, Jacobs, Georg,, Merz, Rolf,, Kopnarski, Michael,, Barrirero, Jenifer,, Aboulfadl, Hisham,, Gachot, Carsten, Merz, Rolf, Hsu, Chia-Jui,   +18 more
core   +2 more sources

Self-healing WS2 tribofilms: An in-situ appraisal of mechanisms [PDF]

Scripta Materialia, 2021
Self-healing tribocoatings are being developed for aerospace applications to improve the lifetime and reduce the surface maintenance of components in motion. Here the tribo-induced self-healing behaviour of a WS2/a-C tribocoating has been evaluated for the first time by in-situ scanning electron microscopy (SEM) to evaluate the mechanisms of damage and
Huatang Cao, Mingwen Bai, Beverley J Inkson, Xiangli Zhong, Jeff Th.M. De Hosson, Yutao Pei, Ping Xiao   +6 more
openaire   +3 more sources

Influence of roughness on ZDDP tribofilm formation in boundary lubricated fretting [PDF]

, 2012
Influence of initial surface topography on tribofilm formation in ZDDP lubricated contact was analysed. A small displacement fretting tests with sinusoidal motion were carried out in classical sphere/plane configuration.
Bigerelle, M., Bigerelle, Maxence, Bigerelle, M, Kubiak, K, Kubiak, KJ, Kubiak, Krzysztof, Mathia, T, Mathia, TG, Mathia, T. G.   +8 more
core   +1 more source

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, Xianghui Meng, Jiabao Yin, Yi Cui, Chengen Wang   +4 more
doaj   +1 more source

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

Friction, 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, Sebastian Schmitt, Hans Hasse, Herbert M. Urbassek   +3 more
doaj   +1 more source

Influence of Artificially Altered Engine Oil on Tribofilm Formation and Wear Behaviour of Grey Cast Cylinder Liners

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, Alexander Hofer, Christian Tomastik, Thomas Wopelka, Carsten Gachot   +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)

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, Sora Shiode, Hiroshi Tani, Norio Tagawa, Shinji Koganezawa   +4 more
doaj   +1 more source

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, Angelika Brink, Dominic Linsler   +2 more
openaire   +2 more sources

Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing

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, Atsushi Korenaga, Hiroki Mano, Tsuguyori Ohana, Akira Sugimura, Akira Mizuno, Yoshiyuki Tanaka, Makoto Maeda, Kazumasa Uchida   +8 more
doaj   +1 more source

Friction and Wear Properties of Hard Coatings on Steel Surfaces under Lubrication with a Fully Formulated Oil with a Mo Additive

Tribology Online, 2021
When various sliding components of combustion engines protected with hard coatings are slid with automotive lubricants, unexpected interfacial phenomena may occur because typical automotive lubricants have been formulated with additives suitable for ...
Kiichi Nakagome, Kaisei Sato, Hikaru Okubo, Seiya Watanabe, Shinya Sasaki   +4 more
doaj   +1 more source