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Role of tribofilms in wear protection
Tribology International, 2016Abstract 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 +3 more
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Tribofilm formation from ZnDTP on diamond-like carbon
Wear, 2008Increasing use of DLC coatings in oil-lubricated, mechanical systems has led to a great deal of interest in optimising the interactions between lubricant additives and coatings. We have looked at the formation of a tribofilm from ZnDTP on diamond-like carbon (DLC) when sliding in oil against DLC on a polished steel substrate under very low wear ...
Roland Hauert, Nicholas D Spencer
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A multi-technique approach of tribofilm characterisation
Thin Solid Films, 2004The 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. +5 more
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Mass balance of the tribofilm in lubricated systems
Tribology International, 2021Abstract 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 +3 more
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Tribofilms: aspects of formation, stability and removal
Journal of Physics D: Applied Physics, 2007There has been much attention paid to the lubricant additives zinc dialkyldithiphosphate and molybdenum dialkyldithiocarbamate as the most commonly used antiwear/antioxidant and friction modifiers. The mechanism by which they function has been the subject of much research work. As a result of these efforts the tribofilms formed from the above additives
Ardian Morina, Anne Neville
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XPS investigations of tribofilms formed on CrN coatings
Applied Surface Science, 2017Abstract Action of lubrication additives in the case of uncoated steel surfaces, including the type and mechanism of tribofilm formation is well known and understood. However, contact type of tribofilms which might form under the tribological contact between CrN coated surfaces, remains more or less unexplored.
Djordje Mandrino, Bojan Podgornik
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Interaction Between Selected MoS2 Nanoparticles and ZDDP Tribofilms
Tribology Letters, 2015Nanoparticles based on transition metal dichalcogenides (TMD) are considered to hold great promise as boundary lubricating additive/material for improving friction and wear of engineering functional surfaces. However, TMD nanoparticles cannot provide a comprehensive surface protection against oxidation, corrosion or sludge control.
A. Tomala +5 more
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Friction response of ZDDP thermal film and tribofilm
Tribology - Materials, Surfaces & Interfaces, 2011An original dynamic tribotest was used to study the friction response of two kinds of tribological surface: zinc-dialkyl-dithio-phosphate (ZDDP) thermal film and ZDDP tribofilm. This apparatus allows friction to be determined with no need for measuring tangential force.
Njiwa, P +4 more
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UHV friction of tribofilms derived from metal dithiophosphates
Tribology Letters, 1999The friction‐reduction mechanisms of Modtp and Zndtp were highlighted by submitting tribofilms to friction in ultra‐high vacuum (UHV). The use of an UHV tribometer to understand these phenomena is justified by the fact that the friction coefficient recorded in UHV is close to the friction coefficient obtained in traditional tests in oil.
C. Grossiord +3 more
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Tribofilm formation on boron carbide in sliding wear
Wear, 1999Abstract A hot isostatically pressed boron carbide (B 4 C) containing some free carbon was evaluated in self-mated sliding tests. Special attention was paid to the formation of tribofilms and their effect on the friction and wear properties. Sliding tests were performed in a pin-on-disc configuration pressing pins with rounded ends towards a rotating
P Larsson, N Axén, S Hogmark
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