Large Area Surface Structuring by Direct LaserInterference Patterning for Adhesive Bonding Applications

Schiefer, Tom; Jansen, Irene; Bieda, Matthias; Pap, József-Sebastian; Lasagni, Andrés-Fabián

doi:10.11618/adhesion.51.223

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…It was concluded that the laser-interference technique yielded periodic structuring on the surfaces with a significant increase in the bonding strength. A similar bonding enhancement effect was also noted for laser-interference structuring of AlMg3 and Ti6Al4V with woven hybrid yarn composites of glass fiber/polypropylene [20]. Compared to simple one-single beam laser ablation, the laser-interference technique creates periodic arrays on metallic surfaces in a size range from sub-micrometer to micrometers [14][15][16].…”

Section: Introductionsupporting

confidence: 56%

“…For F 1 ≥ F th , 'effective' structuring characterized as 0.5d max ≤ d ≤ d max would be attained. At p = 3.51 µm, the threshold F th is ∼2.15 J/cm 2 , as summarized in Table 1 We note that the Cu surfaces used in [20] were ground and polished with diamond suspensions while the Cu surfaces used in this study were cold-rolled. For aluminum, D'Alessandria et al [16] found that the interference structuring was attained at lower fluences for relatively rougher surfaces and larger periodicities.…”

Section: Analysis Of Surface Topology Periodicity Induced By Laser-interferencementioning

confidence: 96%

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Adhesive Bonding of Copper Prepared by Laser-Interference near the Interference Structuring Limits

et al. 2021

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Adhesive bonding requires adequate surface preparation for ensuring an appropriate joint quality. The interest in adhesive joining has recently expanded to thermal systems having a large number of joints employed for manufacturing and assembly. This study presents surface topology of copper 110 produced by a laser-interference setup that would theoretically yield a periodicity of 1.7 μm, which is near the 1.6–2 μm structuring limit that was estimated based on thermal diffusion length scale for an 8 ns laser pulse. The results show that although the expected periodic interference structuring was not attained, the melt-induced texturing was affected by the laser-interference profile. Single-lap shear tests were performed with specimen surfaces prepared by traditional abrasion and laser-interference structuring methods. Several laser processing parameters, such as the laser spot size, density, number of pulses, and raster speed, were studied. Scanning electron microscope and profilometry measurements were used to characterize the processed surface microstructures. Web-like structures, which indicate widespread melting, were shown to be formed at different processing conditions. Based on the surface topologies investigated, two laser raster speeds were selected to make single-lap-joint specimens. Baseline joints were prepared by abrading joining specimens. The shear-lap strength and displacement at maximum load were shown to be higher by 16.8% and 43.8% for the laser-structured specimens than those of the baseline specimens, respectively. Moreover, the load-displacement curves indicated that the laser-structured joints were more ductile than those without laser-structuring. The increased ductility for the laser-structured joints was found to yield an increase in the energy absorbed during shear-lap testing of approximately of 80–90% over those measured for baseline joints. It is another indicator that laser-interference structuring enhanced the bonding performance of single-lap shear joints.

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Section: Introductionsupporting

confidence: 56%

Section: Analysis Of Surface Topology Periodicity Induced By Laser-interferencementioning

confidence: 96%

Adhesive Bonding of Copper Prepared by Laser-Interference near the Interference Structuring Limits

et al. 2021

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“…Besides lithographic methods such as photolithography [1], interference lithography [2,3], nanoimprint lithography [4,5] and deep X-ray lithography [6], short (nanosecond and subnanosecond) and ultrashort pulsed (pico-and femtosecond) laser-based techniques have been established to fabricate well-defined surface micro pattern over the last decades [7][8][9][10]. The effect of such micro structures improves, for example, the anti-adhesive properties of cutting tools [11], reduces friction of automotive components [12,13], generates hydrophobic or superhydrophobic surfaces [14][15][16], enhances cell proliferation on biomaterials [17][18][19], boosts solar cell efficiency [20] and promotes adhesive bonding [21] .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of sub-micron surface structures on copper, stainless steel and titanium using picosecond laser interference patterning

Bieda

Siebold

Lasagni

2016

Applied Surface Science

101

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“…DLIL technology can increase the peak light intensity over the ablation threshold of materials by adjusting the laser distribution instead of the focusing system. It is a parallel fabrication method and a primary processing area can achieve over 0.5 cm 2 and even more so that the periodic patterns in micro and nano scales with a well defined cross-scaled fabrication can be implemented in a few seconds [26,27].…”

Section: Organisation Of Thesismentioning

confidence: 99%

Laser Interference Lithography for Applications in Biomedicine

2017

IFMBE Proceedings

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Surface modification of implant biomaterials has become the commonly used methods for the long life artificial implants and successful orthopaedic implantation. Numbers of technologies have been developed to improve the performances of artificial implants in biological systems. However, most of the technologies are associated with complex, time-consuming and not fully controllable processes, resulting in undesirable micro and nano structures. DLIL provides an effective method for nanomanufacturing of well-designed structures with controllability. The research reported in this thesis tackles the issues with particular focus on DLIL for the fabrication of well-designed micro and nano structures with functionalities including superhydrophobic, wear resistant property and biocompatibility on various biomaterials. Four-beam DLIL was developed to design and fabricate the micro and nano convex structures on silicon surfaces. Parameters such as incident angle, azimuthal angle and polarisation direction were adjusted to simulate micro patterns in period of 5.5 μm for structure design, and laser fluence and exposure duration were set to fabricate micro III PUBLISHED WORK AS PARTS OF THIS THESIS  Research described in Section 4.2 (Simulations and experiments of fabrication of superhydrophobic surfaces on silicon) and Section 4.3 (Results and discussions)

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Large Area Surface Structuring by Direct LaserInterference Patterning for Adhesive Bonding Applications

Cited by 3 publications

References 6 publications

Adhesive Bonding of Copper Prepared by Laser-Interference near the Interference Structuring Limits

Adhesive Bonding of Copper Prepared by Laser-Interference near the Interference Structuring Limits

Fabrication of sub-micron surface structures on copper, stainless steel and titanium using picosecond laser interference patterning

Laser Interference Lithography for Applications in Biomedicine

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