Laser ablation of silicon in water under different flow rates

Charee, Wisan; Tangwarodomnukun, Viboon; Dumkum, Chaiya

doi:10.1007/s00170-014-6625-6

Cited by 59 publications

(40 citation statements)

References 32 publications

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“…Thus, the water film should be thick enough to facilitate the particles flushing and workpiece cooling, but it should not be too thick to cause a significant absorption of laser intensity in water. Based on several reports [3][4][5][6]14,15], the water layer thickness applied in the underwater laser ablation can range from 0.5 to 4 mm depending on the laser wavelength and workpiece materials being cut. Using a thicker water layer is, however, possible as long as higher laser energy is applied to the process.…”

Section: Laser Ablation In a Thin-flowing Water Layermentioning

confidence: 99%

“…4(b). The water layer of 2 mm for the former case was selected as per the applicable range of 1-3 mm suggested by many studies [1,4,5,20]. The results showed that the use of flowing water method can cause a cleaner cut surface and a better edge quality than processing in still water.…”

Section: Comparison Between Still Water and Flowing Water Approachesmentioning

confidence: 99%

“…When the focused laser beam travels to a denser medium, i.e. from air (a) to water, the laser refraction introduces a divergence and in turn causes a larger beam diameter than in air [5]. Consequently, the laser-irradiated area is unlikely removed but more of melting.…”

Section: Comparison Between Still Water and Flowing Water Approachesmentioning

confidence: 99%

“…Water is normally used to assist the process due to its high thermal conductivity, recyclability and cheap. The whole workpiece or only the surface of workpiece to be ablated by laser has to be submerged in water [1][2][3][4][5] or covered by a layer of water [4,6,7], where the laser ablation takes place in the confined volume of water. Since water can exponentially absorb the energy of laser with its travelling distance in water regarding the Beer-Lambert's law, the water layer has to be thin enough to cause less loss of laser intensity.…”

Section: Introductionmentioning

confidence: 99%

“…By using this method, the water film can provide more effective flushing of cut debris and cooling of workpiece than the typical underwater technique. Dowding and Lawrence [7], Tangwarodomnukun et al [6] and Charee et al [5] noted that under a certain flow velocity, the laser-molten material can be removed by the kinetics of water flow, thus decreasing the recast formation and increasing the material removal rate. Based on the literature search, the investigations of underwater laser machining process are mostly accounted for cutting and grooving operations, while a more complicated ablation such as milling process has a very little discussion.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Cavity formation and surface modeling of laser milling process under a thin-flowing water layer

Tangwarodomnukun

2016

Applied Surface Science

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Section: Laser Ablation In a Thin-flowing Water Layermentioning

confidence: 99%

Section: Comparison Between Still Water and Flowing Water Approachesmentioning

confidence: 99%

Section: Comparison Between Still Water and Flowing Water Approachesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cavity formation and surface modeling of laser milling process under a thin-flowing water layer

Tangwarodomnukun

2016

Applied Surface Science

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Anisotropic Superhydrophobic Properties of Bioinspired Surfaces by Laser Ablation of Metal Substrate inside Water

Zhao

Jiang

et al. 2021

Adv Materials Inter

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Water droplet unidirectional adhesion, wetting, and transport on the asymmetric superhydrophobic surfaces have attracted much research interest in theory analyses and applications. In this study, inspired by the butterfly wings and lotus leaf, a novel anisotropic superhydrophobic surface with different tilt angles of the wedge‐shaped structures is prepared on aluminum surfaces via laser ablation inside water. It is demonstrated experimentally that the resistant force of water droplets on the bioinspired surfaces is different along the tilt direction of the wedge‐shaped structure and the inverse direction. The sliding and bouncing behaviors of water droplets on different bioinspired wedge‐shaped structure surfaces are simulated and tested to understand better the mechanism of the rolling and bouncing droplets induced by asymmetric wedge‐shaped structures. Furthermore, the effect of the tilt wedge‐shaped structures on the anisotropic superhydrophobic properties is revealed from the mechanical point of view. The relationship between the anisotropic superhydrophobic properties and the tilt angle of the wedge‐shaped structure is investigated.

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Influence of environmental conditions in bovine bone ablation by ultrafast laser

Aljekhedab

Zhang

Haugen

et al. 2019

Journal of Biophotonics

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Ultrafast lasers are promising tools for surgical applications requiring precise tissue cutting. Shallow ablation depth and slow rate as well as collateral damage are common barriers limiting the use of laser in clinical applications. Localized cooling with water and/or air jet is known to reduce collateral thermal damage. We studied the influence of environmental conditions including air, compressed air flow, still water and water jet on ablation depth, ablation rate and surface morphology on bovine bone samples with an 800 nm femtosecond laser. At 15 J/cm2, no thermal effect was observed by electron microscopy and Raman spectroscopy. The experimental results indicate that environmental conditions play a significant role in laser ablation. The deepest cavity and highest ablation rate were achieved under the compressed air flow condition, which is attributed to debris removal during the ablation process. The shallowest ablation depth and lowest ablation rates were associated with water flushing. For surface morphology, smooth surface and the absence of microcracks were observed under air flow conditions, while rougher surfaces and minor microcracks were observed under other conditions. These results suggest that ultrafast ablation of bone can be more efficient and with better surface qualities if assisted with blowing air jet.

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Laser ablation of silicon in water under different flow rates

Cited by 59 publications

References 32 publications

Cavity formation and surface modeling of laser milling process under a thin-flowing water layer

Cavity formation and surface modeling of laser milling process under a thin-flowing water layer

Anisotropic Superhydrophobic Properties of Bioinspired Surfaces by Laser Ablation of Metal Substrate inside Water

Influence of environmental conditions in bovine bone ablation by ultrafast laser

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