Results 31 to 40 of about 752 (165)
Tribochemical investigation of ZDDP tribofilm
, 2021 The current trend for using lower-viscosity lubricants with the aim of improving fuel efficiency of mechanical systems means that machine components are required to operate for longer periods in thin oil film, mixed and boundary lubrication conditions, where the risk of surface damage is increased. For this reason, the role of tribofilms generated from
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Shear activation of ZDDP reaction films in the presence and absence of nanodiamonds
Applied Surface Science Advances, 2022 We explore the impact of shear stress and nanodiamond (ND) additives on the formation temperatures of thermal- and tribo- reaction films of steel samples immersed in basestock oils containing zinc dialkyl dithio-phosphate (ZDDP) additives.
Biplav Acharya +2 more
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Lube Oil Wear Reduction via Organic Tribofilms [PDF]
Lubricants, 2017 Effective tribofilms are desirable to protect mechanical systems. In the research, the reduction in wear and friction were investigated through the use of organic additives. Graphene-based organic additives were prepared by surface modification of graphene using organic moiety that will provide tribochemical reaction with rubbing metal surface.
Nurul Ismail, Samira Bagheri
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Tribology OnlineThe effects of Polymethacrylate (PMA)-series polar compounds on the friction and wear characteristics and on tribofilm formation in fully formulated low-viscosity engine oil have been studied.
Chao Huang, Saiko Aoki
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The Run-in Process for Stable Friction Fade-Out and Tribofilm Analyses by SEM and Nano-Indenter
Tribology Online, 2017 It was shown in previous reports by authors that friction coefficients of the level of 0.0001 were achieved when ZrO2 (Y-PSZ: yttria partially stabilized zirconia) pins were slid against diamond-like carbon (DLC) films in H2-gas environment under heavy ...
Masataka Nosaka +5 more
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Palladium Nanoparticle-Enabled Ultrathick Tribofilm with Unique Composition
ACS Applied Materials & Interfaces, 2018 There is a consensus that savings of 1.0-1.4% of a country's gross domestic product may be achieved through lubrication R&D. Recent studies have shown great potential for using surface-functionalized nanoparticles (NPs) as lubricant additives to enhance lubricating performance.
Chanaka Kumara +5 more
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Substituent Control of Tribofilm Growth under Mechanochemical Conditions [PDF]
, 2022 Lubricant additives that reduce wear by forming protective tribofilms on sliding surfaces are crucial to maintaining the efficient and reliable operation of many engineering systems. The most important of these additives, zinc dialkyldithiophosphate (ZDDP), has been in use for almost a century; however, several aspects of the physicochemical mechanisms
Jie Zhang, James Ewen, Hugh Spikes
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Friction, 2019 The effects of friction conditions, such as rotational speed, frictional time, and applied load, on the evolution mechanism of sulfide and sulfate on the top and bottom layers of tribofilm were investigated by total electron yield (TEY) and fluorescence ...
Ganlin Zheng +4 more
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Ionic Liquids as Performance Ingredients in Space Lubricants
Molecules, 2021 Low vapor pressure and several other outstanding properties make room-temperature ionic liquids attractive candidates as lubricants for machine elements in space applications.
Erik Nyberg +4 more
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Tribofilms Produced by Supply of Fine Metal Particles in Vacuum
Tribology Online, 2011 This study demonstrates wear-protective tribofilms produced by an artificial supply of fine metal particles onto rubbing steel surfaces in vacuum. The supplied metal particles were Ag, Bi, Cu, Ni, Ti, and Fe, with the diameters of the particles ranging ...
Hirotaka Kato +2 more
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