Nanosecond Laser Ablation of Silicon Carbide at Infrared Wavelength

2010 ◽  
Author(s):  
Yibo Gao ◽  
Yun Zhou ◽  
Benxin Wu
Keyword(s):  
Silicon Carbide ◽  
Laser Ablation ◽  
Electrical Discharge Machining ◽  
High Hardness ◽  
Laser Pulses ◽  
Ablation Rate ◽  
Nanosecond Laser ◽  
Infrared Wavelength ◽  
Nanosecond Laser Ablation ◽  
Mechanical Machining

Silicon carbide, due to its unique properties, has many promising applications in optics, electronics and other areas. However, it is difficult to process using mechanical machining or electrical discharge machining due to its electrical insulation, high hardness and brittleness. Laser ablation can potentially provide a good solution for silicon carbide micromachining. However, the study on silicon carbide ablation by nanosecond laser pulses at infrared wavelength is limited, and will be presented in this paper. The laser ablation rate, laser-induced plasma, the ablated surface morphology and chemical composition change have been studied, and the results are discussed.

Laser Ablation of Titanium: The Experimental Study on Ablation Rate and Plasma Plume Size

2009 ◽  
Author(s):  
Yun Zhou ◽  
Yibo Gao ◽  
Benxin Wu ◽  
Nana Guo
Keyword(s):  
Laser Ablation ◽  
Plasma Plume ◽  
Ablation Rate ◽  
Ablation Depth ◽  
Nanosecond Laser ◽  
Experimental Measurements ◽  
Incubation Effect ◽  
Practical Applications ◽  
Nanosecond Laser Ablation ◽  
Ignition Threshold

Nanosecond laser ablation of titanium in air has been studied experimentally. The measured ablation depth at different pulse numbers indicates an incubation effect for the first ∼10 pulses. Compared with steel, the experiments show a larger plasma plume size and lower plume ignition threshold for titanium. The experimental measurements provide very useful information for the further study and practical applications of laser titanium micromachining.

scholarly journals Femtosecond laser ablation of brass: A study of surface morphology and ablation rate

2012 ◽  
Vol 30 (3) ◽  
pp. 473-479 ◽  
Author(s):  
Mohamed E. Shaheen ◽  
Brian J. Fryer
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Surface Morphology ◽  
Fine Particles ◽  
Femtosecond Laser Ablation ◽  
Laser Pulses ◽  
Ambient Air ◽  
Ablation Rate ◽  
Femtosecond Laser Pulses ◽  
Nanosecond Laser

AbstractThe interaction of near infrared femtosecond laser pulses with a Cu based alloy (brass) in ambient air at atmospheric pressure and under different laser conditions was investigated. The effects of laser fluence and number of pulses on surface morphology and ablation rate were studied using scanning electron microscopy (SEM) and optical microscopy. Ablation rates were found to rapidly increase from 83 to 604 nm/pulse in the fluence range 1.14–12.21 J/cm2. At fluence >12.21 J/cm2, ablation rates increased slowly to a maximum (607 nm/pulse at 19.14 J/cm2), and then decreased at fluence higher than 20.47 J/cm2 to 564 nm/pulse at 24.89 J/cm2. Large amounts of ablated material in a form of agglomerated fine particles were observed around the ablation craters as the number of laser pulses and fluence increased. The study of surface morphology shows reduced thermal effects with femtosecond laser ablation in comparison to nanosecond laser ablation at low fluence.

Nanosecond Laser Ablation of Titanium in Air and Water: The Time-Resolved Observation and Post-Process Characterizations

2010 ◽  
Author(s):  
Yun Zhou ◽  
Yibo Gao ◽  
Benxin Wu
Keyword(s):  
Laser Ablation ◽  
Surface Profile ◽  
Ablation Rate ◽  
Nanosecond Laser ◽  
Composition Change ◽  
Time Resolved ◽  
Laser Induced Plasma ◽  
Nanosecond Laser Ablation ◽  
Post Process ◽  
Low Efficiency

Titanium has lots of competitive applications in aerospace, biomedical and many other areas due to its special properties. However, the machining of titanium using conventional mechanical approaches often has serious tool wear and low efficiency. Laser ablation can potentially provide a good solution for titanium micromachining. In this paper, nanosecond laser ablation of titanium in air and water has been studied. The laser ablation rate, laser-induced plasma, the ablated surface profile and chemical composition change have been studied, and the results are discussed.

scholarly journals Micro- and nanoparticle generation during nanosecond laser ablation: correlation between mass and optical emissions

2014 ◽  
Vol 22 (4) ◽  
pp. 3991 ◽  
Author(s):  
Santiago Palanco ◽  
Salvatore Marino ◽  
M. Gabás ◽  
Shanti Bijani ◽  
Luis Ayala ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Nanosecond Laser ◽  
Optical Emissions ◽  
Nanosecond Laser Ablation ◽  
Nanoparticle Generation
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