Abstract
The film forming condition may transit into thin film lubrication (TFL) at high speeds when it is under severe starvation. Central film thicknesses and film thickness profiles are obtained via a technique of relative optical interference intensity. These profiles show a critical film thickness lower than which the absolute values of the film thickness gradient against speed or time decrease. It is possible to be in the thin film lubrication mode under such conditions. The high speed flow drives the lubricant molecules to rearrange in TFL and critical film thickness higher than 100 nm is achieved. The viscosity is one of the main factors controlling the decreasing rate and the critical film thickness. This paper is designed to investigate the thin film lubrication behavior at high speeds.
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The work is financially supported by National Natural Science Foundation of China (Nos. 51375255, 51321092, and 51527901).
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Jianbin LUO. He received his BEng degree from Northeastern University in 1982, and got his MEng degree from Xi’an University of Architecture and Technology in 1988. In 1994, he received his PhD degree from Tsinghua University and then joined the faculty of Tsinghua University. Prof. Jianbin Luo is an academician of the Chinese Academy of Sciences and a Yangtze River Scholar Distinguished Professor of Tsinghua University, Beijing, China. He was awarded the STLE International Award (2013), the Chinese National Technology Progress Prize (2008), the Chinese National Natural Science Prize (2001), and the Chinese National Invention Prize (1996). Prof. Luo has been engaged in the research of thin film lubrication and tribology in nanomanufacturing. He was invited as a keynote or plenary speaker for 20 times on the international conferences.
Dan GUO. She received the M.S. degree in engineering mechanics in 1995 from Xi’an Jiaotong University and Ph.D. degree in engineering mechanics in 1999 from Tsinghua University. She joined the State Key Laboratory of Tribology at Tsinghua University from 1999. Her current position is a professor and the deputy director of the laboratory. Her research areas cover the mechanism of interaction among nanoparticles, lubrication and failure mechanism under rigorous conditions, and movement behavior of confined-microfluidic.
He LIANG. She received her Ph.D. degree in 2015 from State Key Lab of Tribology, Tsinghua University, China. The same year she joined the Tribology Group at Imperial College London as a postdoc. Her research areas involve the mechanism of lubrication behaviour in lubricated contacts and in rolling element bearings at high speeds.
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Liang, H., Guo, D. & Luo, J. Film forming behavior in thin film lubrication at high speeds. Friction 6, 156–163 (2018). https://doi.org/10.1007/s40544-017-0159-5
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DOI: https://doi.org/10.1007/s40544-017-0159-5