Evolution of nanosecond laser-induced phase explosion based on a high-speed continuous imaging system

Wang, Yaode; Shen, Huijuan; Liu, Chang; Hou, Xiaofei; Tan, Yidong; Hao, Zuoqiang; Li, Changli

doi:10.1016/j.rinp.2021.104782

Cited by 10 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the absorbed energy exceeds the latent heat of melting, a molten pool is created, which can then be induced by evaporation from the melt surface and pressure to shift the liquid metal towards the area around the etching. However, with the increase of laser energy density, the transition from normal evaporation to phase explosion occurs in the superhot melt pool, so as to remove materials [12–14].…”

Section: Resultsmentioning

confidence: 99%

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Wu,

Li,

Zhang

et al. 2024

Materialwissenschaft Werkst

View full text Add to dashboard Cite

In this paper, a nanosecond laser was used to etch the surface of graphene nanoplatelets reinforced ZK60 (GNPs/ZK60) matrix composites, and the effects of different scanning speeds, pulse repetition frequency and laser power on the etched morphology of the machined surface were investigated. The experimental results show that the etched groove width and heat affected zone width of GNPs/ZK60 composites are significantly increased compared with ZK60 material due to the influence of graphene, and the growth rate of the difference in heat affected zone width between GNPs/ZK60 composites and ZK60 materials is most significantly affected by the pulse repetition frequency. In addition, the dross height increases with the increase of laser power, while the scaly dross structure becomes increasingly clear.

show abstract

Section: Resultsmentioning

confidence: 99%

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Wu,

Li,

Zhang

et al. 2024

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

“…The ablation mechanism of the first dimple kind is surface vaporisation that is featured by the conversion of liquid to gas in a liquid-gas interface that is usually named the Knudsen layer. Although the escape speed distribution of the gas material in the liquid layer initially is non-equilibrium, this distribution reaches equilibrium with time [47,48,53,54]. The second type of dimple was produced by the ablation mechanism often called phase explosion, characterised by the creation and subsequent growth of a bubble that is formed of evaporated material surrounded by molten material.…”

Section: Surface Morphologymentioning

confidence: 99%

“…Gas material then presses on the molten material that when the pressure is sufficiently high, the bubble can explode. Explosion ejects the liquid material outside of the laser treated area [47,48,[53][54][55][56][57][58]. The first dimple type was furthermore found at lower E p than the second dimple kind as the phase explosion requires higher energy fluence to be produced than surface vaporisation for the nanosecond pulsed lasers [47].…”

Section: Surface Morphologymentioning

confidence: 99%

Effect of Surface Roughness on the Surface Texturing of 316 l Stainless Steel by Nanosecond Pulsed Laser

Al-Mahdy

Kotadia

Sharp

et al. 2022

Lasers Manuf. Mater. Process.

View full text Add to dashboard Cite

Stainless steel 316L is an austenitic alloy that is widely used in varying industries due to its outstanding corrosion resistance, high strength, and ductility properties. However, the wear and friction resistance properties are low. Laser surface texturing can improve the wear and friction resistance of the material via the functionalisation of the surface. The laser surface texturing efficiency and the texture quality are defined by the material’s surface properties and laser parameters. The surface roughness is an important material property having an effect on laser surface texturing. This paper reports on a study of the material’s surface roughness influence on the texturing of 316L stainless steel with 1064 nm nanosecond pulsed laser. Single pulse shots were employed to avoid the topographic influence of the previous laser shots. The surface shape and the topography of the textures were assessed using optical microscopy and profilometry. It was observed that the textures produced were dimples of U-type and sombrero-like type geometries depending on surface roughness and pulse energy. The overall quality of the texture shape was better for smoother surfaces. The energy fluence necessary to generate textures is lower on surfaces of lower roughness than surfaces with high roughness. The surface at 24 nm of average roughness is the best surface for creating deep textures. The ablation mechanisms associated with high pulse energy, including plasma shielding, are produced at lower pulse energies for the 100 nm roughness, compared with other roughness samples.

show abstract

“…Trapped ions are promising candidates for quantum information science due to their high fidelity operations [1][2][3][4][5] and long trap lifetimes [6,7]. Trapped-ion loading has typically been done by using a resistively heated oven in proximity to the trapping region, which contains an elemental atom source to produce a thermal beam of neutral precursor atoms [8,9].…”

Section: Introductionmentioning

confidence: 99%

Absorption Spectroscopy of 40Ca Atomic Beams Produced via Pulsed Laser Ablation: A Quantitative Comparison of Ca and CaTiO3 Targets

Battles,

McMahon,

Sawyer

2024

Preprint

View full text Add to dashboard Cite

Pulsed laser ablation is an increasingly prevalent method for fast ion trap loading of various species, however characteristics of the ablation target source material can affect the ion-loading process. One factor which can reduce the atomic flux from a target is oxidation during atmospheric exposure when preparing or making changes to the ion trap vacuum system. Recent work has shown that perovskite ablation targets produce consistent atomic densities even after exposure to atmosphere when compared to elemental source targets. In this work, we directly compare calcium (Ca) and calcium-titanate (CaTiO$_3$) ablation targets, characterizing the neutral atomic beam flux using resonant, time-resolved absorption spectroscopy of the 423 nm $^{1}S_0 \rightarrow$ $^{1}P_1$ transition in neutral Ca. We measure the ablation plume longitudinal and transverse temperatures, number density, ion production, and spot lifetime for each target. In addition, we compare the ablated atomic beam density for both targets before and after 21 hours of exposure to atmosphere, demonstrating the relative robustness of the CaTiO$_3$ source.

show abstract

Evolution of nanosecond laser-induced phase explosion based on a high-speed continuous imaging system

Cited by 10 publications

References 16 publications

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Nanosecond laser micromachining of graphene nanoplatelets reinforced ZK60 matrix composites

Effect of Surface Roughness on the Surface Texturing of 316 l Stainless Steel by Nanosecond Pulsed Laser

Absorption Spectroscopy of 40Ca Atomic Beams Produced via Pulsed Laser Ablation: A Quantitative Comparison of Ca and CaTiO3 Targets

Contact Info

Product

Resources

About