Sink electrical discharge machining of hydrophobic surfaces |
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Authors: | Changcheng Guo Philip Koshy Felipe Coelho P. Ravi Selvaganapathy |
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Affiliation: | 1. Department of Mechanical Engineering, McMaster University, Hamilton, Canada;2. Department of Mechanical Engineering, Sao Paulo State University, Bauru, Brazil |
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Abstract: | The phenomenon of hydrophobicity observed in such surfaces as lotus leaves is typically manifest by hierarchical structures on low-energy surfaces. Sustained interest in fabricating hydrophobic surfaces has resulted in a myriad of processes, which are but limited by their largely referring to soft materials and/or involving multiple process steps. The present work explored the application of electrical discharge machining (EDM) for the single-step manufacture of durable, metallic hydrophobic surfaces. Simple sink EDM in a hydrocarbon dielectric, with no special process kinematic or tooling requirements, is demonstrated to rapidly generate surfaces that are intrinsically water repellent, with contact angles approaching 150°. |
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Keywords: | Corresponding author. Material removal Texture Topography |
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