Results 171 to 180 of about 2,042 (207)
Preventive maintenance in urban public transport: the role of engine oil analysis. [PDF]
Sci RepGołębiowski W, Wolak A, Zając G.
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Developing a sustainable grease from jojoba oil with plant waste based nanoadditives for enhancement of rolling bearing performance. [PDF]
Sci RepDube NN, ElKady M, Noby H, Nassef MGA.
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Tribology Transactions, 2008
Environmental regulations have called for a reduction of phosphorus content in engine oils in recent years. The anti-wear additive zinc dialkyl dithiophosphate (ZDDP), which is also an antioxidant, is one of the most important components of engine oil additives. ZDDP is a major source of phosphorus.
A. Somayaji, P. B. Aswath
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Environmental regulations have called for a reduction of phosphorus content in engine oils in recent years. The anti-wear additive zinc dialkyl dithiophosphate (ZDDP), which is also an antioxidant, is one of the most important components of engine oil additives. ZDDP is a major source of phosphorus.
A. Somayaji, P. B. Aswath
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ZDDP and MoDTC interactions in boundary lubrication—The effect of temperature and ZDDP/MoDTC ratio
Tribology International, 2006Abstract Tribofilms formed under boundary lubrication from ZDDP and MoDTC additives alone or in different ratios in the lubricant have been studied. The tribological performance is linked to the tribofilm properties and consequently to the lubricating conditions. Tribofilms are formed using a reciprocating pin-on-plate tribometer.
A. Morina +3 more
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Synthesis of Fluorinated ZDDP Compounds
Part A: Tribomaterials; Lubricants and Additives; Elastohydrodynamic Lubrication; Hydrodynamic Lubrication and Fluid Film Bearings; Rolling Element Bearings; Engine Tribology; Machine Components Tribology; Contact Mechanics, 2006Volatile degradation products of zinc dialkyl dithio phosphate (ZDDP) composed of phosphorus and sulfur compounds reduce the efficiency of catalytic converters resulting in harmful emissions. A unique way of reducing ZDDP level while maintaining good antiwear performance has been achieved by reacting a novel additive FeF3 with ZDDP.
K. Parekh, P. B. Aswath
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Tribology Transactions, 2003
Many phosphorus-based antiwear films, including those formed by zinc dialkyl dithiphosphates (ZDDP), cause a significant increase in friction in thin film, high-pressure, lubricated contacts. This can have a deleterious effect on engine oil fuel efficiency.
L. J. Taylor, H. A. Spikes
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Many phosphorus-based antiwear films, including those formed by zinc dialkyl dithiphosphates (ZDDP), cause a significant increase in friction in thin film, high-pressure, lubricated contacts. This can have a deleterious effect on engine oil fuel efficiency.
L. J. Taylor, H. A. Spikes
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The origin of anti-wear chemistry of ZDDP
Faraday Discussions, 2012Molecular Dynamics has been used to simulate the anti-wear chemistry of zinc dialkyl dithiophosphate (ZDDP). The model simulates the digestion of abrasive particles into the zinc polyphosphate glass. The main result is that the driving force for the tribochemical reaction is not temperature but entropy due to mechanical mixing at the atomic scale.
Jean Michel, Martin +4 more
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Antiwear Chemistry in Presence of ZDDP
World Tribology Congress III, Volume 1, 2005Antiwear chemistry is related to the role of tribochemical reactions in controlling abrasive wear, adhesive wear as well as physical and mechanical properties of tribofilms. In the case of additives in boundary lubrication, three different chemical reactions have been found to be directly connected to mechanical response.
J. M. Martin, C. Minfray
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Effects of Temperature and Pressure on ZDDP
Tribology Letters, 2007A recent theoretical study proposed that the anti-wear property of zinc dialkyl dithio phosphate (ZDDP) is due to the formation of chemically connected networks as a result of pressure-induced cross-linkage of phosphate groups of thermally decomposed ZDDP.
John S. Tse, Yang Song, Zhenxian Liu
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Journal of Nanoscience and Nanotechnology, 2007
Tribofilms with thickness ranging from 100–200 nm were developed in-situ during wear tests using a zinc dialkyl dithiophosphates (ZDDP) and fluorinated ZDDP (F-ZDDP). The influence of the antioxidant alkylated diphenyl amine on the formation and properties of these tribofilm is examined.
Anuradha, Somayaji +2 more
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Tribofilms with thickness ranging from 100–200 nm were developed in-situ during wear tests using a zinc dialkyl dithiophosphates (ZDDP) and fluorinated ZDDP (F-ZDDP). The influence of the antioxidant alkylated diphenyl amine on the formation and properties of these tribofilm is examined.
Anuradha, Somayaji +2 more
openaire +2 more sources