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    Effect of two halogen-free ionic liquids with different anions on the tribological properties of TC4

    Year: 2021

    Journal: J. Mol. Liq., Volume 343, DEC 1

    Authors: Chen, Guoqing; Li, Feizhou; Zhang, Chaoyang; Guo, Xuxia; Yang, Zhaozhao; Yu, Qiangliang; Yu, Bo; Cai, Meirong; Tian, Dongping

    Organizations: National Natural Science Foundation of China [52075524, 21972153]; Youth Innovation Promotion Association of CAS [2018454]; Advance Research Project of China Manned Space (CMS) [040101]; Gansu Province Science and Technology Plan [20JR10RA060, 20JR10RA048]; LICP Cooperation Foundation for Young Scholars [HZJJ21-06]; Natural Science Foundation of Shaanxi Province [2020JM-623]

    Keywords: ILs lubricant; TC4; Anti-corrosion; Anti-wear; Tribochemistry

    Two halogen-free ionic liquids (ILs), P-888P-DABD and P-888P-DOSS, are designed and synthesized to improve the tribological performances of TC4. The difference between the two ILs is the anion: one is composed of sulfonate base anions, and the other is composed of ammonium dibutyl dithiophosphate anions. The thermal stability, tribological performances and anti-corrosion performance of the two ILs were evaluated. The results show that P-888P-DOSS has better tribological performance than P-888P-DABD and can be used as a lubricant for Si3N4/TC4 friction pair. Based on the three-dimensional (3D) profile, SEM, EDS, and the XPS analysis of the worn surfaces of TC4 discs, the P-888P-DOSS has excellent anti-friction and anti-wear properties mainly because of the complex tribochemical reaction between the ILs and TC4 matrix, which forms a protective film with anti-friction and anti-wear performance. This provides theoretical guidance for light alloy lubrication. (C) 2021 Elsevier B.V. All rights reserved.
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