Structure, properties and growth mechanism of a self-assembled nanocylindrical MoS2/Mo-S-C composite film

Duan, Zewen; Qiao, Li; Chai, Liqiang; Xu, Jing; Wang, Peng; Liu, Weimin

doi:10.1016/j.apsusc.2018.09.076

Cited by 29 publications

(20 citation statements)

References 27 publications

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“…Thus, the sliding friction of the steel counterbody at −100 °C on coatings with different sulfur contents caused the transformation of the amorphous structure and probably the formation of a tribofilm with a layered-type MoS2 structure. It is well-known that the formation of such tribo-films at the sliding interface ensures sufficient low-friction properties [34,41,48,49]. The coefficient of friction and the wear resistance of the MoS2, MoS3, and MoS4 coatings, however, differed significantly.…”

Section: Discussionmentioning

confidence: 99%

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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

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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.

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Section: Discussionmentioning

confidence: 99%

“…Another important factor affecting the tribological properties of MoS x coatings is the orientation of basal planes in the MoS 2 lamellar structure with respect to the surface of the coating [49]. The orientation of reference planes can be seen in A 1g and E 2g 1 peak intensities in Raman spectra.…”

Section: Discussionmentioning

confidence: 99%

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

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“…Combined with the XRD result, we concluded that when the deposition temperature was higher than 300 • C, oxygen atoms replace S vacancies in the MoS 2 films and combined with Mo atoms to form Mo-O chemical bonds, which in turn led to the generation of MoO 3 impurities. The formation of Mo-O chemical bonds allowed more Mo atoms to be immobilized inside the lattice during deposition, while the evaporation of S is not mitigated so that the stoichiometric ratio of Mo and S decreased significantly in the samples at 375 • C versus 450 • C compared to those at temperatures below 300 • C. Comparing the results with other experiments (the XRD results of the sample by Nikpay et al [22] and Duan et al [23]), it was found that molybdenum oxide impurities did not appear in the films when the substrate temperature was below 300 • C, confirming the reliability of our conclusions.…”

Section: Structure Of the Filmsmentioning

confidence: 60%

Residual Oxygen Effects on the Properties of MoS2 Thin Films Deposited at Different Temperatures by Magnetron Sputtering

Wang

Tan

2021

Crystals

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Molybdenum disulfide (MoS2) thin films were deposited at different temperatures (150 °C, 225 °C, 300 °C, 375 °C, and 450 °C) on quartz glass substrates and silicon substrates using the RF magnetron sputtering method. The influence of deposition temperature on the structural, optical, electrical properties and deposition rate of the obtained thin films was investigated by X-ray diffraction (XRD), Energy Dispersive Spectrometer (EDS), Raman, absorption and transmission spectroscopies, a resistivity-measuring instrument with the four-probe method, and a step profiler. It was found that the MoS2 thin films deposited at the temperatures of 150 °C, 225 °C, and 300 °C were of polycrystalline with a (101) preferred orientation. With increasing deposition temperatures from 150 °C to 300 °C, the crystallization quality of the MoS2 thin films was improved, the Raman vibrational modes were strengthened, the deposition rate decreased, and the optical transmission and bandgap increased. When the deposition temperature increased to above 375 °C, the molecular atoms were partially combined with oxygen atoms to form MoO3 thin film, which caused significant changes in the structural, optical, and electrical properties of the obtained thin films. Therefore, it was necessary to control the deposition temperature and reduce the contamination of oxygen atoms throughout the magnetron sputtering process.

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“…The mechanism of lubrication of MoS 2 is due to the high adhesion to material surfaces and a low shear strength along the base plane of the hexagonal structure [ 18 ]. To enhance the tribological performance of the pure MoS 2 coating, the MoS 2 /metal composite coatings, such as MoS 2 /Ti [ 19 , 20 ], MoS 2 /Cr [ 21 , 22 ], MoS 2 /W [ 23 ], MoS 2 /C [ 24 ], MoS 2 /Y [ 25 ] and MoS 2 /Zr [ 26 , 27 ], have been fabricated with more favorable mechanical properties and tribological properties. The MoS 2 /Zr composite coatings have been widely used in industrial productions, such as molds, bearing rings, cylinder blocks of engines and machining tools.…”

Section: Introductionmentioning

confidence: 99%

Performance of MoS2/Zr Composite Coatings at Different Deposition Temperatures

Song

Sun²,

Zhao³

et al. 2021

Materials

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The properties of the MoS2/Zr coatings can be significantly affected by the deposition temperature. In this study, the MoS2/Zr composite coatings were fabricated on the cemented carbide surface, utilizing the duplex deposition technology at various deposition temperatures. The effects of deposition temperature on the mechanical and friction properties of the MoS2/Zr coatings were systematically studied. Results exhibited that as the deposition temperature increased, the adhesion force increased first and then decreased, and the coating thickness and micro-hardness gradually increased. Dry sliding tests against a hardened steel ring showed that the tribological behaviors and wear mechanisms of the MoS2/Zr coatings varied with deposition temperature, which were due to the changing mechanical properties of coatings caused by the temperature. The coatings deposited at a temperature of 180 °C and 200 °C possessed preferable comprehensive mechanical and tribological properties.

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Structure, properties and growth mechanism of a self-assembled nanocylindrical MoS2/Mo-S-C composite film

Cited by 29 publications

References 27 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

Residual Oxygen Effects on the Properties of MoS2 Thin Films Deposited at Different Temperatures by Magnetron Sputtering

Performance of MoS2/Zr Composite Coatings at Different Deposition Temperatures

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