Influence of surface texture directionality and roughness on wettability, sliding angle, contact angle hysteresis, and lubricant entrapment capability

Edachery, V and Shashank, R and Kailas, SV (2021) Influence of surface texture directionality and roughness on wettability, sliding angle, contact angle hysteresis, and lubricant entrapment capability. In: Tribology International, 158 .

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Abstract

This work emphasizes on assessing the influence of surface texture directionality and roughness on the lubricant wettability, flowability and entrapment capability of engineering surfaces. Experimental results using Contact Angle Goniometer show that the wettability increases with an increase in roughness in the higher roughness range of ~Ra 886 to 236 nm and with a decrease in roughness in the lower range of ~Ra 151 to 79 nm. The critical sliding angle and critical contact angle hysteresis were obtained at lower sliding-angles when the directionality in texture was parallel to the sliding direction. In near Wenzel mixed-wetting conditions, surfaces having individual entrapment sites (8G texture) revealed better lubricant entrapment capability with up to ~22 entrapment. © 2021 Elsevier Ltd

Item Type:	Journal Article
Publication:	Tribology International
Publisher:	Elsevier Ltd
Additional Information:	The copyright of this article belongs to Elsevier Ltd
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	16 Mar 2021 07:42
Last Modified:	16 Mar 2021 07:42
URI:	http://eprints.iisc.ac.in/id/eprint/68172

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