Abstract
The radial surface coating layer of compression piston rings is used to improve their wear resistance during the internal combustion engine operation. However, at top dead centers, the friction coefficient of the piston ring-cylinder liner pair is detrimental to the engine’s tribological performance. In this work, dimples with different texture dimensions and densities were tested in a home-developed tribometer. The friction coefficient was measured for all samples, and for those with the best results, their wear resistance was assessed. The texture with an aspect ratio of 0.25 and a density area of 15% reported the best tribological results.
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Acknowledgements
This work was supported by Fundação para a Ciência e Tecnologia (FCT) and MAHLE, Componentes de Motores, S.A. through the grant SFRH/BDE/110654/2015 and by the project Add-Additive with the reference POCI-01-0247-FEDER- 024533.
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Rita FERREIRA. She received her M.Sc. degree in mechanical engineering in 2014 from University of Minho, Portugal. She joined the Center for MicroElectroMechanical Systems in 2016, in the mechanical engineering group. After then she enrolled in an Massachusetts Institute of Technology (MIT) Portugal Doctoral Program with a Ph.D. in industry, in cooperation with MAHLE, Componentes de Motores, S.A.. Now she is a Ph.D. candidate of leaders for technical industries at the University of Minho. Her research areas cover the tribology of mechanical parts, manufacturing, and composite materials development for functional surfaces.
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Ferreira, R., Carvalho, Ó., Sobral, L. et al. Laser texturing of piston ring for tribological performance improvement. Friction 11, 1895–1905 (2023). https://doi.org/10.1007/s40544-022-0723-5
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DOI: https://doi.org/10.1007/s40544-022-0723-5