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Citation: YU Guiqin, LIU Jianjun, LIANG Yongmin. Tribological Investigation of Guanidinium Ionic Liquids as Lubricants for Si₃N₄/steel Contacts[J]. Chinese Journal of Applied Chemistry, ;2015, 32(1): 99-103. doi: 10.11944/j.issn.1000-0518.2015.01.140120 shu

Tribological Investigation of Guanidinium Ionic Liquids as Lubricants for Si₃N₄/steel Contacts

1.
College of Chemistry and Engineering, Lanzhou University, Lanzhou 730000, China

Corresponding author: YU Guiqin,
Received Date: 8 April 2014
Available Online: 3 June 2014
Fund Project: 中央高校基本科研业务费专项资金(lzujbky-2013-181)资助 (lzujbky-2013-181)甘肃省自然科学基金(145RJYA236)资助项目 (145RJYA236)

The tribological properties of two kinds of guanidinium ionic liquids with high thermal stability were investigated and compared with alkyl imidazole ionic liquid. The thermal stability of the ionic liquids was evaluated by a thermogravimetric analysis. The images of worn surface are observed under scanning electron microscope(SEM). The X-ray photoelectron spectrometer (XPS) analysis was carried out to explore the lubrication mechanism. The results show that guanidinium ionic liquids are the best lubricant among the tested lubricants for Si₃N₄/steel contacts. They have the strongest carrying capacity,the lowest friction coefficient and the smallest wear volume. Complex tribochemical reactions occurred and the boundary lubrication films were formed in Si₃N₄/steel friction pair interface during the sliding process.
- guanidinium ionic liquids,
- tribological properties,
- Si₃N₄/steel contacts,
- lubricants
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Tribological Investigation of Guanidinium Ionic Liquids as Lubricants for Si3N4/steel Contacts

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Tribological Investigation of Guanidinium Ionic Liquids as Lubricants for Si₃N₄/steel Contacts