Untitled

Parenago, O. P.; Bakunin, V. N.; Kuz’mina, G. N.; Suslov, A. Yu.; Vedeneeva, L.M.

doi:10.1023/a:1014791509751

Cited by 28 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S 2− and S 2 2− ligands mold the Mo atoms into a curved chain. MoS 3 -based nanomaterials may exhibit better antifriction behavior at normal temperatures and humidity when they are in the form of coatings or additives (to hydrocarbon lubricants) [33][34][35]. The tribo-induced formation of a tribo-film with a 2H-MoS 2 lamellar structure was found on the contact surface of these nanomaterials in normal environmental conditions (in terms of sliding friction).…”

Section: Introductionmentioning

confidence: 97%

Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

et al. 2020

View full text Add to dashboard Cite

We studied the tribological properties of amorphous molybdenum sulfide (MoSx) thin-film coatings during sliding friction in an oxidizing environment at a low temperature (−100 °C). To obtain films with different sulfur contents (x ~ 2, 3, and 4), we used reactive pulsed laser deposition, where laser ablation of the Mo target was performed in H2S at various pressures. The lowest coefficient of friction (0.08) was observed during tribo-testing of the MoS3 coating. This coating had good ductility and low wear; the wear of a steel counterbody was minimal. The MoS2 coating had the best wear resistance, due to the tribo-film adhering well to the coating in the wear track. Tribo-modification of the MoS2 coating, however, caused a higher coefficient of friction (0.16) and the most intensive wear of the counterbody. The MoS4 coating had inferior tribological properties. This study explored the mechanisms of possible tribo-chemical changes and structural rearrangements in MoSx coatings upon contact with a counterbody when exposed to oxygen and water. The properties of the tribo-film and the efficiency of its transfer onto the coating and/or the counterbody largely depended on local atomic packing of the nanoclusters that formed the structure of the amorphous MoSx films.

show abstract

Section: Introductionmentioning

confidence: 97%

Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Synthesis and The Tribological Properties Of Oil-soluble Frimentioning

confidence: 99%

“…Recent studies demonstrated the important prospects for use of inorganic nanoparticles as additives that improve the tribological properties of lubricants [2]. For example, a method of obtaining oil-soluble surfacemodified (lyophilized) nanoparticles of molybdenum trisulfide MoS 3 through water-in-oil microemulsions and the antifriction properties of oil compositions with this additive were communicated in [3][4][5].We report the results of a study of the tribological properties of nanoparticles of MoS 3 obtained by thermal decomposition of ammonium dithiomolybdate in a hot amphiphilic matrix at 100-160°C [6,7]. The proposed method of synthesis is distinguished by comparative simplicity and processability; combined with an important decrease in the cost of the product, these attributes enhance the prospects for its practical use.…”

mentioning

confidence: 99%

Highly effective friction modifiers from nano-sized materials

Bokarev

Bakunin

Kuz’mina

et al. 2007

Chem Technol Fuels Oils

Self Cite

View full text Add to dashboard Cite

Synthesis and the tribological properties of oil-soluble friction modifiers made from surface-modified (lyophilized) nanoparticles of molybdenum trisulfide (nano-MoS 3 ) are described. The synergistic effect of nano-MoS 3 and zinc dialkyldithiophosphate (ZnDDP) is demonstrated. Addition of the latter is effective at high temperatures and low concentrations.The increase in the price of crude and petroleum products has made it necessary to conserve sources of energy. One of the fundamental methods of reducing fuel consumption is to decreases losses to friction in machines and mechanisms by reducing the friction coefficient in contact of metal surfaces.During operation of parts in conditions of boundary or mixed friction, oil-soluble friction modifiers based on molybdenum compounds, of which molybdenum dialkyldithiophosphates and dialkyldithiocarbamates are the best known, are the most promising [1]. The basic drawbacks of these compounds as lube oil additives include the relatively complicated methods of synthesizing them with toxic reagents and the comparatively high price. Recent studies demonstrated the important prospects for use of inorganic nanoparticles as additives that improve the tribological properties of lubricants [2]. For example, a method of obtaining oil-soluble surfacemodified (lyophilized) nanoparticles of molybdenum trisulfide MoS 3 through water-in-oil microemulsions and the antifriction properties of oil compositions with this additive were communicated in [3][4][5].We report the results of a study of the tribological properties of nanoparticles of MoS 3 obtained by thermal decomposition of ammonium dithiomolybdate in a hot amphiphilic matrix at 100-160°C [6,7]. The proposed method of synthesis is distinguished by comparative simplicity and processability; combined with an important decrease in the cost of the product, these attributes enhance the prospects for its practical use. Tetraalkylammonium salts were used as the amphiphilic matrix. The exchange reaction takes place in the first stage of synthesis:

show abstract

“…We have previously reported microemulsion-based preparation and some tribological properties of surface-capped molybdenum trisulfide nanoparticles [10] as well as preliminary data for the so-called ''direct'' synthetic procedure [11]. We report here our results on tribological properties and tribofilm chemical composition studied using XANES spectroscopy [2,8] for the surface-capped oil-soluble MoS 3 nanoparticles prepared by a direct low-cost procedure.…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior and tribofilm composition in lubricated systems containing surface-capped molybdenum sulfide nanoparticles

et al. 2006

View full text Add to dashboard Cite

The tribological behavior of surface-capped MoS 3 nanoparticles (nano-MoS 3 ) in hydrocarbon oils was studied both alone and in combination with ZDDP. It was found that the nano-MoS 3 additive alone demonstrates pro-wear properties and decreases the friction coefficient only at high temperatures. The combination with ZDDP demonstrates synergism in antiwear and antifriction activity even at low ZDDP content. X-ray Absorption Near Edge Structure (XANES) spectroscopy at the sulfur, molybdenum and phosphorus edges was used to identify the chemical species in tribochemical films. It was established that the nano-MoS 3 -formed tribofilms are composed of oxidized sulfur and molybdenum species while tribofilms formed by combination with ZDDP are composed of phosphate layers incorporating MoS 2 -type fragments providing friction reduction.

show abstract

Untitled

Cited by 28 publications

References 5 publications

Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

Reactive Pulsed Laser Deposition of Clustered-Type MoSx (x ~ 2, 3, and 4) Films and Their Solid Lubricant Properties at Low Temperature

Highly effective friction modifiers from nano-sized materials

Tribological behavior and tribofilm composition in lubricated systems containing surface-capped molybdenum sulfide nanoparticles

Contact Info

Product

Resources

About