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Coatings 2018, 8(3), 110; https://doi.org/10.3390/coatings8030110

Effect of Untampered Plasma Coating and Surface Texturing on Friction and Running-in Behavior of Piston Rings

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
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Author to whom correspondence should be addressed.
Received: 17 February 2018 / Revised: 13 March 2018 / Accepted: 16 March 2018 / Published: 19 March 2018
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Abstract

The running-in behavior and the associated transient friction characteristics of a piston ring with different surface treatments are experimentally evaluated using a custom-made engine testing apparatus. Results are reported for a series of running-in and steady-state experiments on piston rings with different combinations of coated and textured surfaces. Comparisons are provided between five different types of piston rings: (1) with no textures; (2) with textures only; (3) with coating only; (4) first textured and then coated; and (5) first coated and then textured. A combination of the texturing and coating showed 12.5% improvement in the frictional behavior and up to 50% improvement in break-in time compared to cases when only one surface treatment was applied. View Full-Text
Keywords: piston rings; plasma coating; surface laser texturing; engine’s friction; running-in piston rings; plasma coating; surface laser texturing; engine’s friction; running-in
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Akbarzadeh, A.; Khonsari, M.M. Effect of Untampered Plasma Coating and Surface Texturing on Friction and Running-in Behavior of Piston Rings. Coatings 2018, 8, 110.

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