Abstract
The direct blending of polyether ether ketone (PEEK) with a solid lubricant such as polytetrafluoroethylene (PTFE) improves its tribological performance, but compromises its outstanding mechanical properties and processability. While these negative effects might be circumvented via the hybrid wear method, the influence of the contact temperature between multiple sliding components acting together is not fully understood. Herein, an analytical temperature model considering the influence of both micro- and macro-thermal behavior is extended to predict the contact temperature of a dual-pin-on-disk hybrid wear system. The interactions between several heat sources are investigated and experimentally verified. The analytical results show that the nominal temperature rise of the shared wear track is determined by the combined effect of the heat generated by both pin components, while the rise in flash temperature at the region in contact with each pin component is dependent upon its individual characteristics and working conditions. Hence, while different temperature peaks can coexist in the shared wear track, the maximum value dominates the performance of the system. For the experimentally investigated PEEK-PTFE-steel hybrid wear system, the formation of tribofilms is blocked, and the hybrid wear system fails, when the peak temperature exceeds the glass transition temperature of both pins due to an increase in applied load.
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Abbreviations
- A ri :
-
Real contact area in the contact region between Pin (i) and Disk (3) (m2)
- d :
-
Diameter of test ring (m)
- D :
-
Diameter of equivalent disk of the test ring assembly (m)
- F i :
-
Applied load on Pin (i) (N)
- F s :
-
Seizure load (N)
- h c :
-
Average convective heat transfer coefficient of rotating test ring assembly (W/(m2·°C))
- H i :
-
Hardness of Pin (i) (MPa)
- K i :
-
Thermal conductivity of Component (i) (W/(m·°C))
- l :
-
Length of specimen pin (m)
- L :
-
Sliding distance (m)
- N i :
-
Number of contacting asperities on the contact region between Pin (i) and Disk (3) (m)
- Pe :
-
Peclet number
- q i3pin−n :
-
Nominal heat fluxes entering Pin (i) within contact region of Pin (i) and Disk (3) (W/m2)
- q i3pin :
-
Heat fluxes entering the real contact area of Pin (i) within the contact region of Pin (i) and Disk (3) (W/m2)
- q i3disk :
-
Heat fluxes entering the real contact area of the disk within contact region of Pin (i) and Disk (3) (W/m2)
- Q i3 :
-
Heat flow generated within contact region between Pin (i) and Disk (3) (W)
- Q i3disk :
-
Heat flow entering Disk (3) within contact region of Pin (i) and Disk (3) (W)
- Q i3pin :
-
Heat flow entering Pin (i) within contact region of Pin (i) and Disk (3) (W)
- r :
-
Radius of specimen pin (m)
- r ai :
-
Load independent radius of a contacting asperity (m)
- r ji :
-
Radius of each asperity in the contact region between Pin (i) and Disk (3) (m)
- R :
-
Distance between the axis of the pin and ring (m)
- S :
-
Area of the expose surface of the test ring assembly (m2)
- T amb :
-
Ambient temperature (°C)
- T c :
-
Peak contact temperature (°C)
- T ci :
-
Peak contact temperature of the sliding surface of Pin (i) (°C)
- T c3−i :
-
Peak contact temperature of steel ring in region contact with Pin (i) (°C)
- ΔT f :
-
Transient flash temperature rise (°C)
- ΔT fi :
-
Transient flash temperature rise of pin (i) (°C)
- ΔT f3−i :
-
Transient flash temperature rise of steel ring in region contact with Pin (i) (°C)
- T g :
-
Glass transition temperature (°C)
- T mea :
-
Measured temperature of steel ring surface (°C)
- ΔT n :
-
Nominal temperature rise (°C)
- ΔT ni :
-
Nominal temperature rise of Component (i) (°C)
- v :
-
Sliding velocity of specimen pin on the ring (m/s)
- w :
-
Angular velocity of test ring rotation (rad/s)
- μ i :
-
Friction coefficient of Pin (i)
- κ 3 :
-
Thermal diffusivity of Steel ring (3) (m2/s)
- α i :
-
Partitioning fraction of heat entering Pin (i) within contact region of Pin (i) and Disk (3)
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 62073151), the Jilin Provincial Science & Technology Department (Nos. 20200301011RQ and 20210101177JC) and the Fundamental Research Funds for the Central Universities (No. 22120210160).
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Zhibin LIN. He received his bachelor’s degree in automotive engineering from Jilin University, China, in 2017. He is currently a Ph.D. candidate in the State Key Laboratory of Automotive Simulation and Control at Jilin University, China. His current research focuses on hybrid wear behaviors of polymer composite, tribofilm analysis, and tribology equipment development.
Guibin WANG. He received his Ph.D. degree in polymer chemistry and physics from Jilin University, China, in 2000. He joined the Special Engineering Plastics Engineering Research Center of the Ministry of Education, Jilin University, China, from 2002. His current position is a professor of the laboratory. His research areas cover the synthesis and molding of high-performance polymers, functionalization of resin matrix composites, and high-performance polymers.
Bingzhao GAO. He received his B.S. and M.S. degrees in vehicle engineering from Jilin University, China, in 1998 and 2002, respectively, and his Ph.D. degrees in mechanical engineering from Yokohama National University, Japan and in control engineering from Jilin University, China, in 2009. He is currently a professor with Tongji University, China. His current research interests include vehicle drivetrain design and intelligent vehicle.
Guowei FAN. He received his M.S. and Ph.D. degrees from Harbin Institute of Technology, China, in 2008 and 2012, respectively. Now he is an associate professor with the College of Instrumentation and Electrical Engineering, Jilin University, China. His research interest covers model predictive control, optimal and robust control, and applications in satellite attitude control.
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Lin, Z., Qu, T., Zhang, K. et al. Modeling of contact temperatures and their influence on the tribological performance of PEEK and PTFE in a dual-pin-on-disk tribometer. Friction 11, 546–566 (2023). https://doi.org/10.1007/s40544-022-0615-8
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DOI: https://doi.org/10.1007/s40544-022-0615-8