Study of the fluence dependent interplay between laser induced material removal mechanisms in metals: Vaporization, melt displacement and melt ejection

Fishburn, J.M.; Withford, Michael J.; Coutts, David W.; Piper, James A.

doi:10.1016/j.apsusc.2005.07.053

Cited by 85 publications

(49 citation statements)

References 14 publications

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“…Numerical models have predicted an increased mass flow rate at the edges of the irradiated zone as a consequence of a spatial plasma pressure variation [36], although other mechanisms such as explosive ablation can also generate crater morphologies with grooves of di↵erent depths depending on the laser 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 machining parameters and ablation e ciencies [37][38][39][40][41][42]. Surface features such as droplets and the use of a moderate fluence < 7 J/cm2 [37] point towards pressure-induced melt displacement being the main mechanism behind the generation of the surface morphology, with some melt instability that results in droplet ejection and recondensation on the surface [43].…”

Section: Discussionmentioning

confidence: 99%

“…Surface features such as droplets and the use of a moderate fluence < 7 J/cm2 [37] point towards pressure-induced melt displacement being the main mechanism behind the generation of the surface morphology, with some melt instability that results in droplet ejection and recondensation on the surface [43]. In this context, 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 the observed craters could be the consequence of bubble entrapment during melt pool solidification [44][45][46], or bubble formation at the interface between redeposited ejected droplets and the solid substrate [47].…”

Section: Discussionmentioning

confidence: 99%

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Induced hydrophobicity in micro‐ and nanostructured nickel thin films obtained by ultraviolet pulsed laser treatment

Carpeño

Dickinson

Seal

et al. 2016

Physica Status Solidi (a)

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Abstractauthoren Nickel thin films were deposited on Ti6Al4V and surface treated with nanosecond pulse ultraviolet laser in ambient conditions using a fluence of 3.68 J cm−2. A twofold to threefold increase in contact angle was observed for water, ethylene glycol, and diiodomethane following laser treatment, with recorded contact angles for water in excess of 130°. No additional treatment was used to hydrophobize the surface. Three different micro‐ and nanometric levels of roughness were generated on the thin film surface, which can be related to the rastering parameters of the laser and to the increase in apparent contact angle. Melt droplets were identified as a main contribution to the nanometric roughness level, indicating that melting and melt ejection play an important role in surface nanostructuring. Micro‐ and nanopatterning obtained after UV laser treatment of nickel thin films, highlighting the different scales of the generated features.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Induced hydrophobicity in micro‐ and nanostructured nickel thin films obtained by ultraviolet pulsed laser treatment

Carpeño

Dickinson

Seal

et al. 2016

Physica Status Solidi (a)

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“…4). It is assumed that such a displacement of the melted layer is due to reacting-forces originating from the laser ablation process [20,21]. Therefore, the deformation is more pronounced with higher power densities and lower scanning speeds.…”

Section: Laser Texturing On Aluminium Surfacementioning

confidence: 99%

Microfabrication of an anodic oxide film by anodizing laser-textured aluminium

Jha

Kikuchi

Sakairi

et al. 2007

J. Micromech. Microeng.

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A simple method for the fabrication of microstructures of aluminium anodic oxide film (anodic alumina) by anodizing laser-textured aluminium is demonstrated. In the process, the aluminium substrate was first textured by a low power laser beam, and then the textured aluminium was subjected for anodizing, to develop a continuous, thick porous layer on the textured surface. Microstructures with a few to several tens of micrometers depth were fabricated successfully on the anodic oxide film using various combinations of laser power density and laser scanning speed. Removing the film from the aluminium substrate enables the fabrication of various 2D and 3D microstructures from anodic alumina.

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“…Primary attention is paid to model the dynamics of phase explosion of liquid phase of aluminum and the expansion of its fragments in the air, since explosive boiling is considered to be one of the most effective thermal mechanisms of ns laser ablation of materials. Various aspects of this problem have been studied in a number of theoretical and experimental studies [43][44][45][46][47][48][49][50][51][52][53][54][55][56], but there is still no consensus on the mechanism of the phase explosion in metals. In order to obtain detailed information on interaction of heterogeneous and homogeneous mechanisms and data on laser plume morphology, simulation of laser heating, melting, surface evaporation, and evolution of plume in the vapor-gas medium is performed within the framework of new hydrodynamic model with temperature dependences of material properties of the target and explicit tracking of interphase boundary fronts, contact boundary, and shock wave.…”

Section: Introductionmentioning

confidence: 99%

“…In other experimental and theoretical studies of the interaction of ns-laser pulses with an intensity of 10 7 -10 8 W/cm 2 with metallic targets, the results of the appearance of metal-dielectric transitions accompanied by the formation of transparency waves are reported [53,54,85,[88][89][90][91].…”

mentioning

confidence: 99%

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

Mazhukin¹

2017

Laser Ablation - From Fundamentals to Applications

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The basic mathematical models, computational algorithms, and results of mathematical modeling of various modes of laser action on metals are considered. It is shown that for mathematical description and analysis of the processes of laser heating, melting, and evaporation of condensed media, various theoretical approaches are used: continuum, kinetic, atomistic, etc. Each of them has its own field of applicability, its advantages, and disadvantages. Mathematical description of ns-laser ablation is usually carried out within the framework of continuum approach in the form of hydrodynamic models that take into account reaction of irradiated material to varying density, pressure, and energy both in the target and in the vapor-gas medium. Within the framework of continuum approach, a multiphase, multifront hydrodynamic model and computational algorithm were constructed that were designed for modeling ns-PLA of metal targets embedded in gaseous media. It is shown that proposed model and computational algorithm allow to carry out the simulation of interrelated mechanisms of heterogeneous and homogeneous evaporation of metals manifested as a series of explosive boiling. Modeling has shown that explosive boiling in metals occurs due to the presence of a near-surface temperature maximum. It has been established that in ns-PLA, exposure regimes can be realized in which a phase explosion is the main mechanism of material removal. The verification of reliability of obtained results was carried out by comparing experimental data and calculations with atomistic models.

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Study of the fluence dependent interplay between laser induced material removal mechanisms in metals: Vaporization, melt displacement and melt ejection

Cited by 85 publications

References 14 publications

Induced hydrophobicity in micro‐ and nanostructured nickel thin films obtained by ultraviolet pulsed laser treatment

Induced hydrophobicity in micro‐ and nanostructured nickel thin films obtained by ultraviolet pulsed laser treatment

Microfabrication of an anodic oxide film by anodizing laser-textured aluminium

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

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