Abstract
In this study, spherical and mesoporous NiAl particles (abbreviated as sNiAl and mNiAl) were introduced as lubricant additives into two alkyl-imidazolium ionic liquids (ILs) (1-butyl-3-methylimidazolium tetrafluoroborate (LB104) and 1-butyl-3-methyl imidazolium hexafluorophosphate (LP104)) to explore their tribological properties. The sNiAl and mNiAl particles were modified in-situ by anion and cation moieties of ILs through chemical interaction, thereby enhancing their dispersibility and stability in ILs. The mNiAl particles have better dispersibility than the sNiAl ones in ILs because of high specific surface area. LP104-modified sNiAl particles show better friction reduction and wear resistance, mainly relying on the synergy of the hybrid lubricant. These particles form a protective layer that prevents friction pairs from straight asperity contact and improves the tribological behaviors.
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The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (No. 51705435 and No. 51627806), key project of Sichuan Department of Science and Technology (No. 2018JZ0048) and Fundamental Research Funds for the Central Universities (2018GF05).
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Yao YAO. He received his bachelor’s degree from Central South University, Changsha, China, in 2016. He is currently a graduate student at School of Mechanics and Engineering, Southwest Jiaotong University. His research interests include design of lubricating materials and tribological properties of lubricant additives.
Xiaoqiang FAN. He is currently an associate professor at Southwest Jiaotong University. His research interests are focused on preparation and tribological property of lubricating materials and functionalized nano-materials as lubricant additives. He received his Ph.D degree from Lanzhou Institute of Chemical Physics, Chinese Academy Science in 2016. He received his bachelor’s degree in 2011 from Qingdao University of Science & Technology.
Yi XU. He received his bachelor’s degree and Ph.D degree from Southwest Jiaotong University, Sichuan, China, in 2003 and 2014, respectively. He is currently an associate professor at School of Mechanics and Engineering, Southwest Jiaotong University. His research interests include design and manufacture of powder metallurgy, spray forming alloy, and composite materials, rapid solidification microstructure evolution and phase field simulation.
Minhao ZHU. He received his bachelor’s degree and master’s degree from Southwest Jiaotong University, Sichuan, China, in 1990 and 1993, respectively. Since then he has been working in Southwest Jiaotong University. From 1996 to 2001, he pursued his Ph.D from Southwest Jiaotong University, Sichuan, China. His current position is a professor, Ph.D student advisors, Cheung Kong Scholars and Dean of School of Materials Science and Engineering. His research areas cover fretting wear, fretting fatigue, surface engineering, and design of fastener connection.
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Yao, Y., Xu, Y., Fan, X. et al. Tribological properties of spherical and mesoporous NiAl particles as ionic liquid additives. Friction 8, 384–395 (2020). https://doi.org/10.1007/s40544-019-0266-6
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DOI: https://doi.org/10.1007/s40544-019-0266-6