Results 141 to 150 of about 752 (165)

Carbon-based tribofilms from lubricating oils

Nature, 2016
Moving mechanical interfaces are commonly lubricated and separated by a combination of fluid films and solid 'tribofilms', which together ensure easy slippage and long wear life. The efficacy of the fluid film is governed by the viscosity of the base oil in the lubricant; the efficacy of the solid tribofilm, which is produced as a result of sliding ...
Ali, Erdemir, Giovanni, Ramirez, Osman L, Eryilmaz, Badri, Narayanan, Yifeng, Liao, Ganesh, Kamath, Subramanian K R S, Sankaranarayanan   +6 more
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(iv) Tribofilm on hip implants

Orthopaedics and Trauma, 2013
Abstract Performance and longevity of artificial joints are highly correlated with the surface properties of the prosthesis materials. In view of the importance of this research area, this article consolidates the research work with some fundamental aspects to build up a comprehensive picture of the current state of knowledge.
Yu Yan, Linghe Wang, Anne Neville, Lijie Qiao   +3 more
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Formation and Characterization of Tribofilms

Journal of Tribology, 2008
Fundamentals of tribofilm formation and their properties were studied. In order to understand the effects of lubricants on tribofilms, four base oils were investigated. Lubricants include castor oil, polyethylene glycol, mineral oil, and margarine.
Prasenjit Kar, Pranay Asthana, Hong Liang   +2 more
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Formation and Nature of Carbon-Containing Tribofilms

ACS Applied Materials & Interfaces, 2019
Minimizing friction and wear at a rubbing interface continues to be a challenge and has resulted in the recent surge toward the use of coatings such as diamond-like carbon (DLC) on machine components. The problem with the coating approach is the limitation of coating wear life. Here, we report a lubrication approach in which lubricious, wear-protective
Hongxing Wu, Arman Mohammad Khan, Blake Johnson, Kiran Sasikumar, Yip-Wah Chung, Q. Jane Wang   +5 more
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Tribofilm formation in ultrananocrystalline diamond film

Diamond and Related Materials, 2017
Abstract Friction and wear properties of ultrananocrystalline diamond (UNCD) films are found to be superior, and therefore it could be useful for various applications. However, understanding of the tribological properties with respect to boundary phase composition in this material is not yet well understood.
Revati Rani, K.J. Sankaran, Kalpataru Panda, N. Kumar, K. Ganesan, S. Chakravarty, I-Nan Lin   +6 more
openaire   +1 more source

Role of tribofilms in wear protection

Tribology International, 2016
Abstract Engine valve train wear protection has been observed despite the absence of classical tribofilm formation. This was found with a lubricant containing zinc dialkyldithiophosphate (ZDDP), despite conventional understanding that ZDDP reduces wear by forming a thick, protective, inorganic phosphate tribofilm. We suggest that an antiwear additive
Andrew R. Konicek, Peter W. Jacobs, Martin N. Webster, Alan M. Schilowitz   +3 more
openaire   +1 more source

Chemistry of ZDDP Tribofilm by ToF-SIMS

Tribology Letters, 2004
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) (static and dynamic modes) has been applied to chemical characterization of zinc dithiophosphate additives tribofilm. Main result concerns insights in the spatial distribution of phosphate and sulphide species in the whole tribofilm thickness, at a sub-micrometer scale.
Minfray, Clotilde, Martin, J.M., Barros, M.I. De, Mogne, T. Le, Kersting, R., Hagenhoff, B.   +5 more
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A multi-technique approach of tribofilm characterisation

Thin Solid Films, 2004
The characterization of tribofilms has already been studied by various surface analysis tools for many years. The analytical techniques usually performed on this kind of samples are X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and X-ray absorption near-edge structure (XANES).
Minfray, C., Martin, J.M., Esnouf, Claude, Le Mogne, T., Kersting, R., Hagenhoff, B.   +5 more
openaire   +1 more source

Mass balance of the tribofilm in lubricated systems

Tribology International, 2021
Abstract The efficiency of the lubrication systems varies during the time of use of each batch of lubricant, increasing wear and friction in the lubricated system. In this work, transient mass balances of the lubricant precursors that form the protective film in lubricated systems, the substances that constitute the deposited film, and the waste ...
Saúl Domínguez-García, Claudio E. Aguilar-Ramírez, Luis Béjar-Gómez, Rafael Maya-Yescas   +3 more
openaire   +1 more source