PRINTING HYDROPHOBIC STAINLESS STEEL GRAPHENE COMPOSITES

dc.creatorO'Donnell, M.
dc.creatorBudan, J.
dc.creatorMcGuire, J.
dc.creatorJalagam, P.
dc.creatorKulkarni, Achyuth
dc.creatorAnsell, T.Y.
dc.date.accessioned2024-03-25T22:39:12Z
dc.date.available2024-03-25T22:39:12Z
dc.date.issued2023
dc.description.abstractHydrophobic surfaces have low surface energies, which prevents water droplets from wetting the surface. Metals typically have high surface energies leading to highly wettable, hydrophilic behavior. Nano-structuring metallic surfaces could be a way of making a metallic surface hydrophobic potentially leading to improved corrosion resistance, drag reduction, etc. 3Dprinting a metal matrix nanocomposite maybe a scalable method to fabricate hydrophobic metals. Graphene nanoplatelets (GNP) were mixed with 316L stainless-steel (SS) powder and printed on a selective laser melting platform. The composite samples included 0, 1, 2, and 3 vol% GNP. Initial printing jobs ran into some issues that were addressed by adding a vibration source and aluminum foil to the inside of the powder hopper. Additionally, energy density was set higher than 60 J/mm3 to avoid lack of fusion issues. Printing of small and large plates of composite samples was performed at energy densities starting from 60 J/mm3 going up to 100 J/mm3 . As-printed composite sample surfaces consistently exhibited hydrophobic behavior with contact angles exceeding 90°. After polishing, the surfaces exhibited hydrophilic behavior. What is compelling; however, is that while contact angles for pure SS was as expected, i.e., angles < 80°, the composite samples showed angles between 80° and 90°, drawing closer to 90° with an increase in GNP.
dc.description.departmentMechanical Engineering
dc.identifier.urihttps://hdl.handle.net/2152/124326
dc.identifier.urihttps://doi.org/10.26153/tsw/50934
dc.language.isoen_US
dc.publisherUniversity of Texas at Austin
dc.relation.ispartof2023 International Solid Freeform Fabrication Symposium
dc.rights.restrictionOpen
dc.subjecthydrophobic surfaces
dc.subjectstainless steel
dc.subjectgraphene
dc.subjectadditive manufacturing
dc.titlePRINTING HYDROPHOBIC STAINLESS STEEL GRAPHENE COMPOSITES
dc.typeConference paper

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