Explosive boiling of metals upon irradiation by a nanosecond laser pulse

Mazhukin, V. I.; Samokhin, A. A.; Demin, Mikhail Mikhailovich; Shapranov, A. V.

doi:10.1070/qe2014v044n04abeh015388

Cited by 19 publications

(6 citation statements)

References 5 publications

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“…The structure of the electric double layer can play an important role in the conditions of strong nonstationarity and non-equilibrium processes, for example, in studies of the interaction of fs-laser radiation with metal. At the early stage, the electrons emitted from the surface are still very close to the metal target, and can affect the electron transfer and the electric field inside the target [21]. In particular, they can contribute to the development of the large outwardly directed electric field in the surface region of the target.…”

Section: Discussionmentioning

confidence: 99%

The structure of the electrical double layer at the metal-vacuum interface

Mazhukin¹,

Shapranov²

2019

MathMon

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The problem of the electric double layer at the interface of the metal (Al)-vacuum in the stationary approximation is considered. Detailed analysis of the structure of the electrical double layer at the metal-vacuum interface allowed us to establish that the magnitude of the electric field reaches the maximum value on the metal surface. The electron density at the metal boundary is a weekly varying electron temperature function. However, the temperature dependence becomes significantly noticeable on the spatial electron density profile outside the metal. The establishment of electroneutrality in a double electric layer is accompanied by the appearance of a spatial inhomogeneity of electrons in a thin near-surface layer of a metal. This inhomogeneity must be taken into account when formulating the boundary conditions in hydrodynamic models. The calculations also showed that the ion pressure on the metal surface is zero. But the spatial profile of the ion pressure under the influence of electric field forces becomes negative. In the case of external influence, the electric field forces may be too large, and may lead to the destruction of the surface area of the metal.

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Section: Discussionmentioning

confidence: 99%

The structure of the electrical double layer at the metal-vacuum interface

Mazhukin¹,

Shapranov²

2019

MathMon

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“…Due to the difficulty of conducting experiments at high temperatures, the critical point and binodal parameters were obtained only for a small amount of substances, which include alkali metals and mercury, which have relatively low temperature characteristics [6][7][8][9][10][11]. For other materials, there are only theoretical estimates within the framework of various models, among which phenomenological methods [12][13][14][15][16][17][18][19][20][21][22][23][24] and atomistic modeling methods [25][26][27][28][29][30][31] stand out.…”

Section: Introductionmentioning

confidence: 99%

“…An important tool in the modeling of the properties of substances and physical processes inaccessible to direct measurement was mathematical modeling based on atomistic models. The atomistic approach is represented by Monte Carlo [19,29,30,31] and molecular dynamics [25][26][27][28] methods. Within the framework of the Monte Carlo method, to determine the critical parameters of metals and nonmetallic substances, the Wang -Landau (EWL) approach [29].…”

Section: Introductionmentioning

confidence: 99%

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Atomistic modeling of the critical region of copper using a liquid-vapor coexistence curve

Demin¹,

Koroleva²,

Shapranov³

et al. 2019

MathMon

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A liquidvapor coexistence curve was obtained for copper by the method of molecular dynamics modeling (MDM), and the corresponding critical parameters were determined: temperature, density, and pressure. The interaction potential of particles was of the "embedded atom" type (EAM). The critical temperature T cr was determined from the MDM results using the average cluster size method in the critical region. To clarify the critical density value, the empirical rule of rectilinear diameter was used. The results of modeling of this work were compared with the results of evaluating of the critical parameters of copper by other authors using different approaches.

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“…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].…”

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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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Explosive boiling of metals upon irradiation by a nanosecond laser pulse

Cited by 19 publications

References 5 publications

The structure of the electrical double layer at the metal-vacuum interface

The structure of the electrical double layer at the metal-vacuum interface

Atomistic modeling of the critical region of copper using a liquid-vapor coexistence curve

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

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