Results 31 to 40 of about 590,663 (189)

Friction Reduction by Laser Irradiation for a Friction System Using Bearing Steel and Aluminum Alloy in Engine Oil

open access: yesTribology Online, 2022
Aluminum alloy sliding components are widely used in internal combustion engines. However, aluminum easily adheres to the countersurface, resulting in high friction.
Kento Ihara, Koshi Adachi
doaj   +1 more source

Determination of base oil content in lubricating greases by NMR

open access: yes, 2023
Magnetic Resonance in Chemistry, Volume 61, Issue 6, Page 380-385, June 2023.
T. Rudszuck, H. Nirschl, G. Guthausen
wiley   +1 more source

Tribological Behaviour of PVD Coatings Lubricated with a FAP− Anion-Based Ionic Liquid Used as an Additive

open access: yesLubricants, 2016
This paper studies 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate ionic liquid ([BMP][FAP]) as a 1 wt% additive to a polyalphaolefin (PAO 6) in the lubrication of CrN and TiN PVD coatings.
José-Luis Viesca   +5 more
doaj   +1 more source

Enhanced Growth of ZDDP-Based Tribofilms on Laser-Interference Patterned Cylinder Roller Bearings

open access: yesLubricants, 2017
Laser surface texturing has been successfully applied in the past to various machine elements in order to improve their tribological performance. In this study, direct laser interference patterning was used to produce periodic cross-like surface patterns
Chia-Jui Hsu   +3 more
doaj   +1 more source

Formation mechanisms of zinc, molybdenum, sulfur and phosphorus containing reaction layers on a diamond‐like carbon (DLC) coating Bildungsmechanismen von zink‐, molybdän‐, schwefel‐ und phosphorhaltigen tribochemischen Reaktionsschichten auf einer diamantähnlichen Kohlenstoffbeschichtung (DLC)

open access: yesMaterialwissenschaft und Werkstofftechnik, Volume 51, Issue 7, Page 1009-1030, July 2020., 2020
Tribochemical reactive formed layers on diamond‐like carbon (DLC) after tribological testing were analyzed. Hereby, the formation of zinc, molybdenum, sulfur and phosphorus containing reaction layers could be identified using Raman spectroscopy and scanning electron microscopy.
K. Bobzin   +3 more
wiley   +1 more source

Friction Modelling in Boundary Lubrication Considering the Effect of MoDTC and ZDDP in Engine Oils

open access: yesTribology Online, 2011
A predictive friction model has been developed in boundary lubrication conditions to understand the sensitivity of the model to molybdenum dithiocarbamate (MoDTC), a friction modifying additive and zinc dialkyldithiophosphate (ZDDP), an antiwear additive
Rupesh Roshan   +6 more
doaj   +1 more source

Tribochemical degradation of vacuum‐stable lubricants: A comparative study between multialkylated cyclopentane and perfluoropolyether in a vacuum ball‐on‐disc and full‐bearing tests

open access: yesLubrication Science, Volume 32, Issue 4, Page 183-191, June 2020., 2020
Abstract In this study, the decomposition of a multialkylated cyclopentane (MAC) and a perfluoro‐poly‐ether (PFPE) lubricant was investigated in a ball‐on‐disc sliding test under vacuum and in a rolling contact fatigue (RCF) test on full bearings. In situ mass spectrometry was conducted to study the tribochemical formation of hydrogen in a steel‐on ...
Dominik Kürten   +2 more
wiley   +1 more source

Artificial Aging Experiments of Neat and Contaminated Engine Oil Samples

open access: yesLubricants, 2021
This study highlights how the results from an artificial engine oil aging method compare to used engine oil samples collected from a vehicle fleet. Additionally, this paper presents the effect of contaminating the oil during aging with synthetic fuel ...
András Lajos Nagy   +2 more
doaj   +1 more source

Tribological Bench and Engine Dynamometer Tests of a Low Viscosity SAE 0W-16 Engine Oil Using a Combination of Ionic Liquid and ZDDP as Anti-wear Additives

open access: yesFrontiers in Mechanical Engineering, 2015
We have previously reported an oil-miscible phosphonium-organophosphate ionic liquid (IL) with effective anti-wear functionality when added to a base oil by itself or combined with a conventional zinc dialkyldithiophosphate (ZDDP) for a synergistic ...
William C Barnhill   +7 more
doaj   +1 more source

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

open access: yesLubricants, 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   +4 more
doaj   +1 more source

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