Results 71 to 80 of about 1,653 (213)

Comparing Tribochemical Film Formation and Durability at Steel and CrN Coating Interface in Boundary Lubrication

open access: yesTribology Online, 2010
One of the main challenges that engine oil manufacturers are now facing is to reduce friction losses while at the same time increasing the durability of engine components.
Ardian Morina   +2 more
doaj   +1 more source

Insight into the high-temperature tribological mechanism of VAlTiCrW high entropy alloy film: AlV3O9 from tribochemistry

open access: yesFriction, 2022
High-entropy alloys have made significant progress in high mechanical properties, wear resistance, and corrosion resistance properties. Excellent tribological properties, especially high-temperature lubrication, have become another sought performance. In
Xuesong Liu   +3 more
doaj   +1 more source

Role of the Controlled Periodic Illumination (CPI) for Enhancing the Photonic Efficiency of a Photocatalytic System

open access: yesChemCatChem, Volume 16, Issue 20, October 21, 2024.
Efficiency of photo‐processes on semiconductor surfaces is typically measured under continuous irradiation of the catalyst; this can lead to determined limitations given by the substrate‐catalyst interaction. In this short review, we highlight the strengths and the weaknesses of several published studies on pollutants abatement and hydrogen production ...
Ettore Bianco   +4 more
wiley   +1 more source

Antiwear performance of ionic liquid+graphene dispersions with anomalous viscosity-temperature behavior [PDF]

open access: yes, 2018
New dispersions of few-layers graphene (G) in 1-ethyl-3-methylimidazolium ([EMIM]) ionic liquids (ILs) with dicyanamide ([DCA]) or bis(trifluoromethylsulfonyl)imide ([TFSI]) anions have been obtained by mechanical mixing and sonication.
Arias Pardilla, Joaquín   +6 more
core   +3 more sources

Fabrication of periodic nanostructures using AFM tip-based nanomachining: combining groove and material pile-Up topographies [PDF]

open access: yes, 2018
This paper presents an atomic force microscopy (AFM) tip-based nanomachining method to fabricate periodic nanostructures. This method relies on combining the topography generated by machined grooves with the topography resulting from accumulated pile-up ...
Brousseau, Emmanuel   +5 more
core   +2 more sources

Valorisation of glycerol by new mechanochemical processes [PDF]

open access: yes, 2019
The search for new applications of glycerol, as a chemical platform from which a broad spectrum of new valuable derivatives can be obtained, is ongoing. In the present communication, a new mechano-chemical reactor is used for the valorisation of glycerol,
Halloumi, Samy   +5 more
core  

Interplay between microstructural evolution and tribo-chemistry during dry sliding of metals

open access: yesFriction, 2019
Understanding the microstructural and tribo-chemical processes during tribological loading is of utmost importance to further improve the tribological behavior of metals.
Philipp G. Grützmacher   +5 more
doaj   +1 more source

The role of surface roughness and slide-roll ratio in the decomposition of MoDTC in tribological contacts [PDF]

open access: yes, 2017
In this study, the role of surface roughness and slide-roll ratio in the decomposition and friction performance of molybdenum dialkyldithiocarbamate (MoDTC) has been investigated.
Jarnias, F   +4 more
core   +1 more source

Stress-augmented thermal activation: Tribology feels the force

open access: yesFriction, 2018
In stress-augmented thermal activation, the activation energy barrier that controls the rate of atomic and molecular processes is reduced by the application of stress, with the result that the rate of these processes increases exponentially with applied ...
Hugh Spikes
doaj   +1 more source

Interfacial chemistry of a perfluoropolyether lubricant studied by XPS and TDS [PDF]

open access: yes
The interfacial chemistry of Fomblin Z25, a commercial perfluoropolyether used as lubricant for space applications, with different metallic surfaces: 440C steel, gold and aluminum was studied.
Herrera-Fierro, Pilar C.   +2 more
core   +1 more source

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