Abstract
This work is aimed at investigating the friction and wear performance of different polymeric materials having potential for hydraulic system components under lubricated sliding conditions against a steel counter face. A pin-on-disc test configuration was used for the experimental study. The different polymeric materials selected for these studies were commercial polyimides (PI), polyether ether ketone (PEEK), and flouropolymers. Some of these materials were bulk materials whereas others were used as coatings applied on to the cast iron substrate. The tribological characteristics of the polymers were compared with a reference grey cast iron. The frictional characteristics were evaluated in both static and dynamic conditions. The results have shown that by using polymeric materials it is possible to reduce breakaway friction by an order of magnitude compared to grey cast iron. However, the breakaway friction increased significantly after the wear tests. The polymeric materials having lowest breakaway friction have shown the highest wear with the exception of the PEEK-PTFE coating which showed low wear. PI with graphite fillers also showed low wear but it resulted in relatively high friction. The carbon fibre reinforced materials resulted in unstable friction as well as higher wear compared to the PI materials with graphite fillers.
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Daniel NILSSON. He obtained his MS degree from the Royal Institute of Technology, Sweden in 1998. Since then, he has been working at Bosch Rexroth (formerly Hägglunds Drives). He obtained his PhD degree from the Division of Machine Elements of Luleå University of Technology, Sweden in 2011. His research and development activities pertain to tribological aspects of hydraulic systems, performance evaluation, testing and analysis of tribological problems.
Braham PRAKASH. He obtained his MTech (Mechanical Engineering) and PhD (Tribology) degrees from Indian Institute of Technology Delhi, India. He is presently a professor and head of Tribolab at the Division of Machine Elements of Luleå University of Technology in Sweden since January 2002. He was a visiting researcher of Tokyo Institute of Technology (1985) and fellow of Japan Society for the Promotion of Science (JSPS) at Chiba Institute of Technology (1998–2000). He has over 37 years of R&D experience both in academia and industry in the field of tribology. His research & teaching activities pertain to high temperature tribology, tribology of materials & lubricants, solid lubricants/self-lubricating coatings; boundary lubrication, tribology of machine components (bearings, gears and seals), analysis of wear problems, and tribotesting.
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Nilsson, D., Prakash, B. Static/dynamic friction and wear of some selected polymeric materials for conformal tribo-pairs under boundary lubrication conditions. Friction 1, 232–241 (2013). https://doi.org/10.1007/s40544-013-0020-4
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DOI: https://doi.org/10.1007/s40544-013-0020-4