Wettability characteristics of polyethylene modified with CO2, Nd:YAG, excimer and high-power diode lasers

2001 ◽  
Vol 215 (12) ◽  
pp. 1735-1744 ◽  
Author(s):  
J Lawrence ◽  
L Li
Keyword(s):  
Excimer Laser ◽  
High Power ◽  
Wavelength Dependence ◽  
Laser Surface ◽  
Laser Surface Treatment ◽  
Wetting Properties ◽  
Excimer Laser Radiation ◽  
Power Diode ◽  
High Power Diode Laser ◽  
Contrast Interaction

Interaction of CO2, Nd:YAG, excimer and high-power diode laser (HPDL) radiation with the surface of the biomaterial polyethylene (PE), was found to effect varying degrees of change to the wettability characteristics of the material depending upon the laser used. It was observed that interaction with CO2, Nd:YAG and HPDL effected very little change to the wettability characteristics of the PE. In contrast, interaction of the PE with excimer laser radiation resulted in a marked improvement in the wettability characteristics. After excimer laser treatment, the surface O2 content was found to have increased and the material was seen to be more polar in nature, resulting in a significant increase in the wettability characteristics. The work has shown that the wettability characteristics of the PE could be controlled and/or modified with laser surface treatment. However, a wavelength dependence of the change in the wetting properties could not be deduced from the findings of this work.

scholarly journals The Effect of Laser Surface Treatment on Structure and Mechanical Properties Aluminium Alloy ENAC-AlMg9

2016 ◽  
Vol 61 (3) ◽  
pp. 1343-1350 ◽  
Author(s):  
W. Pakieła ◽  
L.A. Dobrzański ◽  
K. Labisz ◽  
T. Tański ◽  
K. Basa ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Tungsten Carbide ◽  
Aluminium Alloy ◽  
Diode Laser ◽  
High Power ◽  
Ceramic Powder ◽  
Laser Surface ◽  
Laser Surface Treatment ◽  
Power Diode ◽  
High Power Diode Laser

Abstract In this work, the influence of a high power diode laser surface treatment on the structure and properties of aluminium alloy has been determined. The aim of this study was to improve the mechanical and tribological properties of the surface layer of the aluminium alloy by simultaneously melting and feeding tungsten carbide particles into the molten pool. During the process was used high-power diode laser HPDL. In order to remelt the aluminium alloy surface the HPDL laser of 1.8, 2.0 and 2.2 kW laser beam power has been used. The linear laser scan rate of the beam was set 0.5 cm/s. In order to protect the liquid metal during laser treatment was used argon. As a base material was used aluminium alloy ENAC-AlMg9. To improve the surface mechanical and wear properties of the applied aluminium alloy was used biphasic tungsten carbide WC/W2C. The size of alloying powder was in the range 110-210 µm. The ceramic powder was introduced in the remelting zone by a gravity feeder at a constant rate of 8 g/m.

Numerical and experimental study of the temperature field evolution of Mg alloy during high power diode laser surface melting

Optik ◽  
2015 ◽  
Vol 126 (7-8) ◽  
pp. 739-743 ◽  
Author(s):  
Yu Gan ◽  
Wenxian Wang ◽  
Zeqin Cui ◽  
Xinggui Yan ◽  
Zhuosen Guan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Temperature Field ◽  
Diode Laser ◽  
High Power ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Mg Alloy ◽  
Power Diode ◽  
High Power Diode Laser
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