Temporal and spatial diagnosis of nanosecond laser ablation and laser induced plasma

2017 ◽  
Author(s):  
Hao Liu ◽  
Xin Peng ◽  
Minsun Chen ◽  
Guomin Zhao
Keyword(s):  
Laser Ablation ◽  
Nanosecond Laser ◽  
Laser Induced Plasma ◽  
Nanosecond Laser Ablation ◽  
Temporal And Spatial

Deburring Effect of Plasma Produced by Nanosecond Laser Ablation

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Yun Zhou ◽  
Yibo Gao ◽  
Benxin Wu ◽  
Sha Tao ◽  
Ze Liu
Keyword(s):  
Shock Wave ◽  
Laser Ablation ◽  
High Spatial Resolution ◽  
Shape Change ◽  
The Other ◽  
Nanosecond Laser ◽  
Laser Induced Plasma ◽  
Nanosecond Laser Ablation ◽  
Mechanical Breaking ◽  
The Sacrifice

This paper presents an interesting nanosecond (ns) laser-induced plasma deburring (LPD) effect (from microchannel sidewalls) discovered by the authors, which has been rarely reported before in the literature. Fast imagining study has been performed on plasma produced by ns laser ablation of the bottom of microchannels. It has been found that the plasma can effectively remove burrs from the sidewall of the channels, while on the other hand microscopic images taken in this study did not show any obvious size or shape change of the channel sidewall after LPD. LPD using a sacrifice plate has also been studied, where the plasma for deburring is generated by laser ablation of the sacrifice plate instead of the workpiece. The observed laser-induced plasma deburring effect has several potential advantages in practical micromanufacturing applications, such as high spatial resolution, noncontact and no tool wear, and less possibility of damaging or overmachining useful microfeatures when removing burrs from them. The fundamental mechanisms for the observed laser-induced plasma deburring effect still require lots of further work to completely understand, which may include mechanical breaking of burrs due to high kinetic energies carried by plasma and the associated shock wave, and/or thermal transport from plasma to burrs that may cause their heating and phase change, or other mechanisms.

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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