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Low Deposition Temperature-Induced Changes of the Microstructure and Tribological Property of WS2 Film

1
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2
Shanghai Aerospace System Engineering Institute, Shanghai 201108, China
3
China Academy of Space Technology, Beijing 100094, China
*
Authors to whom correspondence should be addressed.
Coatings 2019, 9(4), 227; https://doi.org/10.3390/coatings9040227
Received: 28 February 2019 / Revised: 22 March 2019 / Accepted: 27 March 2019 / Published: 30 March 2019
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PDF [3325 KB, uploaded 30 March 2019]
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Abstract

Pure WS2 films were prepared by the radio frequency sputtering of a WS2 target with the initial substrate temperature controlled to −40, −25, 0 °C and room temperature by cooling the holder with liquid nitrogen, respectively. The influence of the substrate temperature on the microstructures and the tribological properties of the prepared films have been evaluated and the wear mechanism of the films was explained. It revealed that with decreasing the substrate temperature, the prepared WS2 film changed from the loose and coarse columnar plate structure for film deposited at room temperature to a much more compact morphology for film deposited at −40 °C. The WS2 film deposited at low temperature of −40 or −25 °C exhibited a long wear life higher than 5.0 × 105 sliding cycles, while this was about 1.5 × 105 cycles for the WS2 deposited at room temperature. The improved tribological properties for the low temperature-deposited film were mainly attributed to the much lower wear rate resulted from the compact structure as well as the sustained and steadily formed transform layer on the counterpart ball. View Full-Text
Keywords: tungsten disulfide; low temperature deposition; tribological property; wear life tungsten disulfide; low temperature deposition; tribological property; wear life
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Hu, M.; Dong, Y.; Wang, Y.; Wang, D.; Jiang, D.; Fu, Y.; Weng, L.; Sun, J.; Gao, X. Low Deposition Temperature-Induced Changes of the Microstructure and Tribological Property of WS2 Film. Coatings 2019, 9, 227.

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