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Tribology Letters
Erschienen in: Tribology Letters 1/2019

01.03.2019 | Original Paper

Vacuum Tribological Performance of WS2–MoS2 Composite Film Against Oil-Impregnated Porous Polyimide: Influence of Oil Viscosity

verfasst von: Zhen Yan, Dong Jiang, Yanlong Fu, Dan Qiao, Xiaoming Gao, Dapeng Feng, Jiayi Sun, Lijun Weng, Haizhong Wang

Erschienen in: Tribology Letters | Ausgabe 1/2019

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Abstract

To achieve the desired levels of performance and durability for bearings applied in space, a novel solid–liquid dual lubricating system was established via the WS2–MoS2 composite films sliding against oil-impregnated porous polyimide (PPI), in which polyalphaolefin (PAO) oils with different viscosities were used, respectively. The contact angle measurement indicated that the PAO oil had good wettability on the surfaces of the composite film and the PPI. The vacuum tribological behaviors of single WS2–MoS2 composite film and the dual lubricating system were mainly evaluated under different loads and speeds. In comparison with single WS2–MoS2 composite film, the dual lubricating system exhibited the low friction coefficient and synergistic lubricating effect for the low-viscosity PAO oil under severe sliding conditions. It was concluded that the cleavages of the WS2 and MoS2 crystals along the basal plane were more sufficient and formed small and thin WS2 and MoS2 platelets in the dual lubricating system. Meanwhile, it was found that oil-impregnated PPI readily released PAO lubricating oil with low viscosity, which further decreased friction on the contact interface. The lubricating mechanism of the dual lubricating system was also revealed after correlating the tribological behaviors of the different lubricating systems.
Vorheriger Artikel Cavitation Erosion Behaviors of a Nickel-Free High-Nitrogen Stainless Steel
Nächster Artikel Frequency-Modulation Atomic Force Microscopic Observation for Ultralow Frictional Solid–Liquid Interface of Diamond-Like Carbon in an Environmentally Friendly Oil

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Metadaten
Titel
Vacuum Tribological Performance of WS2–MoS2 Composite Film Against Oil-Impregnated Porous Polyimide: Influence of Oil Viscosity
verfasst von
Zhen Yan
Dong Jiang
Yanlong Fu
Dan Qiao
Xiaoming Gao
Dapeng Feng
Jiayi Sun
Lijun Weng
Haizhong Wang
Publikationsdatum
01.03.2019
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 1/2019
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-018-1101-3

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