Nanosecond laser texturing of aluminium for control of wettability

Sharp, Martin; Rosowski, Adam; French, P.

doi:10.1117/12.2179929

Cited by 7 publications

(5 citation statements)

References 15 publications

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“…The use of nanosecond lasers to obtain hydrophobic surfaces on different metallic substrates has been reported, e.g. on aluminium alloys [30][31][32], stainless steel [33], copper and brass [34].…”

Section: Introductionmentioning

confidence: 99%

Combined surface hardening and laser patterning approach for functionalising stainless steel surfaces

García‐Girón

Romano

Liang

et al. 2018

Applied Surface Science

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The paper reports a laser patterning method for producing surfaces with dual scale topographies on ferritic stainless steel plates that are hardened by low temperature plasma surface alloying. Nitrogen and carbon based gasses were used in the alloying process to obtain surface layers with an increased hardness from 172 HV to 1001 HV and 305 HV, respectively. Then, a nanosecond infrared laser was used to pattern the plasma treated surfaces and thus to obtain super-hydrophobicity, by creating cellor channel-like surface structures. The combined surface hardening and laser patterning approach allowed super-hydrophobic surfaces to be produced on both nitrided and carburised stainless steel plates with effective contact angles higher than 150 0. The hardened layers on nitrided samples had cracks and was delaminated after the laser patterning while on plasma carburised samples remained intact. The results showed that by applying the proposed combined approach it is possible to retain the higher hardness of the nitrided stainless steel plates and at the same time to functionalise them to obtain super-hydrophobic properties.

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Section: Introductionmentioning

confidence: 99%

Combined surface hardening and laser patterning approach for functionalising stainless steel surfaces

García‐Girón

Romano

Liang

et al. 2018

Applied Surface Science

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“…1,10,31 However there are few reports that study this relation with nanosecond lasers. Sharp et al 32 recently reported a study on laser ablation with a ns-IR-laser in which they were not able to identify signicant correlation between laser parameters and contact angle, therefore not dening the mechanisms in play that create the hydrophobicity. As this is not the scope of this work, further research is suggested to look for the surface chemistry inuence of each factor in time independently for samples patterned with nanosecond lasers.…”

mentioning

confidence: 99%

Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

et al. 2017

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aMicro cell structures of different sizes were patterned using a nanosecond near-infrared laser source on Al2024 aluminium alloy plates with 2 mm thickness. The influence of laser parameters on the shape and size of the produced patterns were studied together with the evolution of wettability properties over time for different storage conditions. Samples were found to be superhydrophobic from a single step laser patterning, requiring no further treatment. Exposure to ambient air was shown to be a key factor in the property changes of the samples over time. The produced surface patterns with different laser parameter settings were correlated with the contact angle measurements, revealing a great influence of the amount of recast material on the hydrophobic properties. X-Ray photoelectron spectroscopy was used to study the impact of surface chemistry changes on hydrophobicity, analysis of elemental composition proved that chemisorbed organic molecules present in the ambient air were responsible for the hydrophilic to superhydrophobic transition.

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“…In general, laser processing can be divided into laser thermal processing and photochemical processing. Laser thermal processing, including laser welding 6 , surface modification 7 , laser marking 8 , and laser drilling 9 , etc, refers to processes using the thermal effects which are induced by a laser beam. Photochemical processing, including laser chemical vapor deposition 10 and laser stereolithography 11 , etc, refers to the machining processes in which a high energy laser beam irradiates to the surface of an object and then induces the photochemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on realizing blind micro-grooves on the surface of an aluminum sheet using two nanosecond lasers

Wang¹,

Xing²,

Huang³

et al. 2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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Although aluminum processing with lasers has become popular in industrial applications, machining some blind grooves or blind holes with a required size in aluminum sheets is also a difficult task for laser technicians. In this paper, blind grooves with the depth of about 0.1 mm and the width of less than 0.1 mm on a 0.24 mm thick aluminum sheet have been realized by using two kinds of nanosecond Q-switched lasers without burning the coating polymer layer. The effects of the laser wavelength, average power, and scanning speed on laser processing have been investigated in detail. The groove machining of aluminum sheets has been carried out at different laser power and machining speeds by use of two Q-switched lasers with the wavelengths of 532 nm and 355 nm. The experiment result shows that the faster the scanning speed, the better the processing efficiency. And the status of blind grooves processed by a 355 nm laser is cleaner and smarter. In summary, the optimal laser parameters for processing grooves on the aluminum surface are the peak power density of 2.27×108 W/cm2 with the scanning speed of 0.1 mm/s for a 355 nm nanosecond laser. The results of our study might be of great importance as a reference for processing blind grooves on aluminum sheets in some industrial applications.

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Nanosecond laser texturing of aluminium for control of wettability

Cited by 7 publications

References 15 publications

Combined surface hardening and laser patterning approach for functionalising stainless steel surfaces

Combined surface hardening and laser patterning approach for functionalising stainless steel surfaces

Influence of ambient conditions on the evolution of wettability properties of an IR-, ns-laser textured aluminium alloy

Experimental study on realizing blind micro-grooves on the surface of an aluminum sheet using two nanosecond lasers

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