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Descripción
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| In the present work, a study of laser-based surface structuring of aerospace-grade titanium alloy (Ti-6Al-4V) with subsequent ageing by employing two different storage methods is undertaken. The titanium alloy samples were patterned using UV-ns and IR-fs pulsed lasers in a two-step process to fabricate bio-inspired hierarchical structures. The resulting surface structure consisted in regular periodic square-shaped micro-pillars covered by 810?nm-periodic LIPSS. After the laser processing the samples were kept in two different storage conditions: exposed to ambient air and inside polyethylene bags. The polyethylene bags were found to be beneficial for the surface ageing of laser-fabricated titanium surfaces, increasing the ageing time when compared to ageing by exposure to ambient air. Hierarchical surface topographies exhibited higher water-repellency when compared to non-hierarchical structures. Especially, hierarchical structures reached a hydrophobic state with water contact angle over 160° after 3?weeks storage in polyethylene bags. The micro-structured surfaces were characterized by using confocal microscopy, scanning electron microscopy, static contact angle measurements and X-ray photoelectron spectroscopy. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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Applied Surface Science |
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ISSN
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0169-4332 |
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Factor de impacto JCR
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4,439 |
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Información de impacto
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Datos JCR del año 2017 |
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Volumen
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463 |
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DOI
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10.1016/j.apsusc.2018.09.012 |
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Número de revista
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Desde la página
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838 |
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Hasta la página
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846 |
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Mes
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ENERO |
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Ranking
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1/19 (Material science, coatings and films) |