Microchanneling on bio-inert dental ceramic using dry pulsed laser ablation and liquid supported pulsed laser ablation approach

Rout, Sweta; Panigrahi, Debasish; Patel, Saroj Kumar; Dhupal, Debabrata

doi:10.1016/j.optlaseng.2021.106654

Cited by 20 publications

(2 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During this process, a small amount of laser energy is absorbed by liquid water and makes it to vaporize instantaneously. The majority of the laser beam can penetrate through the liquid medium lm to act on the workpiece surface, causing the surface temperature to rise rapidly [25]. Furthermore, when high-energy pulse laser penetrates liquid water, it undergoes ionization during instantaneous gasi cation process to generate high-temperature and high-pressure plasma [26].…”

Section: Mechanism Of Dlm and Wjalmmentioning

confidence: 99%

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Han,

Tong,

et al. 2024

Preprint

View full text Add to dashboard Cite

The difficult-to-cut characteristics of silicon carbide (SiC) ceramic has limited its processing quality and forming process of functional surfaces. Comparing to direct laser machining (DLM), waterjet-assisted laser micromachining (WJALM) is an alternative technique for SiC ceramic that is capable of reducing thermal-induced damages. In this paper, high-aspect-ratio (HAR) microchannels are fabricated on silicon carbide ceramic by WJALM, and its effectiveness is verified through comparative experiments with DLM. The effects of parametric combination of waterjet and laser parameters on machining responses of geometric structural features and sidewall surface quality are investigated by controlled variable experiments. Results revealed that HAR microchannels with almost no recast layers could be obtained when SiC workpiece was fabricated by a nanosecond laser under the flowing water medium layer. And higher average laser power of 27W, lower scanning speed of 600m/s and medium waterjet velocity of 12/16m/s contributed to larger aspect ratio, more ablation area and superior sidewall quality of HAR microchannels.

show abstract

Section: Mechanism Of Dlm and Wjalmmentioning

confidence: 99%

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Han,

Tong,

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…With upcoming high-power industrial grade pico- and femtosecond lasers, there is a growing demand for machining strategies to deploy laser powers over 100 W to overcome the limiting factor of the material removal rate with coincident high quality surfaces for potential applications, such as dental implants [ 17 , 18 ]. A recent study shows the possibility of high-power ultrashort pulse laser ablation of alumina with minimized thermal load in the heat affected zone, which paves the way for processing strategies using high-power laser sources towards industrial implementation [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Micromachining of Alumina Using a High-Power Ultrashort-Pulsed Laser

2022

View full text Add to dashboard Cite

We report on a comprehensive study of laser ablation and micromachining of alumina using a high-power 1030 nm ultrashort-pulsed laser. By varying laser power up to 150 W, pulse duration between 900 fs and 10 ps, repetition rates between 200 kHz and 800 kHz), spatial pulse overlap between 70% and 80% and a layer-wise rotation of the scan direction, the ablation efficiency, ablation rate and surface roughness are determined and discussed with respect to an efficient and optimized process strategy. As a result, the combination of a high pulse repetition rate of 800 kHz and the longest evaluated pulse duration of 10 ps leads to the highest ablation efficiency of 0.76 mm3/(W*min). However, the highest ablation rate of up to 57 mm3/min is achieved at a smaller repetition rate of 200 kHz and the shortest evaluated pulse duration of 900 fs. The surface roughness is predominantly affected by the applied laser fluence. The application of a high repetition rate leads to a small surface roughness Ra below 2 μm even for the usage of 150 W laser power. By an interlayer rotation of the scan path, optimization of the ablation characteristics can be achieved, while an interlayer rotation of 90° leads to increasing the ablation rate, the application of a rotation angle of 11° minimizes the surface roughness. The evaluation by scanning electron microscopy shows the formation of thin melt films on the surface but also reveals a minimized heat affected zone for the in-depth modification. Overall, the results of this study pave the way for high-power ultrashort-pulsed lasers to efficient, high-quality micromachining of ceramics.

show abstract

Coaxial water and air jet–assisted laser micromachining of titanium

Charee

Zhu

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Microchanneling on bio-inert dental ceramic using dry pulsed laser ablation and liquid supported pulsed laser ablation approach

Cited by 20 publications

References 47 publications

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Micromachining of Alumina Using a High-Power Ultrashort-Pulsed Laser

Coaxial water and air jet–assisted laser micromachining of titanium

Contact Info

Product

Resources

About