Formation of sub-wavelength laser induced periodic surface structure and wettability transformation of CFRP laminates using ultra-fast laser

Kumar, D and Liedl, G and Gururaja, S (2020) Formation of sub-wavelength laser induced periodic surface structure and wettability transformation of CFRP laminates using ultra-fast laser. In: Materials Letters, 276 .

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Abstract

Present work focuses on wettability transformation of carbon fiber reinforced plastic (CFRP) surface by generating micro/nano-structures using a femtosecond laser system. Laser induced periodic surface structures (LIPSS) were realized on carbon fiber (CF) surface at different defocus distances and pulse energies. The hydrophilic CFRP surface obtained just after the laser treatment progressively depicts hydrophobic behavior and further transforming to near superhydrophobic after cleaning followed by vacuum process for 4 h. Scanning electron microscopy (SEM) analysis was performed to capture the generated structure on the carbon fiber surface. Pulse fluence was effective parameters for transition of LSFL to HSFL. The lowest spatial period � � 95 ± 6 nm and � � 387 ± 15 nm was achieved for HSFL and LSFL, respectively, at 0.3 mJ. © 2020 Elsevier B.V.

Item Type:	Journal Article
Publication:	Materials Letters
Publisher:	Elsevier B.V.
Additional Information:	The copyrights for this article belongs to publishers.
Keywords:	Carbon fiber reinforced plastics; Scanning electron microscopy; Superhydrophobicity; Surface structure; Wetting, Carbon fiber reinforced plastics (CFRP); Defocus distance; Effective parameters; Femtosecond laser system; Laser treatment; Laser-induced periodic surface structures; Spatial periods; Sub-wavelength, Laser pulses
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	20 Dec 2024 09:27
Last Modified:	20 Dec 2024 09:27
URI:	http://eprints.iisc.ac.in/id/eprint/66081

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