Wettability characteristics of a modified mild steel with CO2, Nd:YAG, excimer and high power diode lasers

Lawrence, Jonathan and Li, Lin (1999) Wettability characteristics of a modified mild steel with CO2, Nd:YAG, excimer and high power diode lasers. Journal of Physics D: Applied Physics, 32 (18). pp. 2311-2318. ISSN 0022-3727

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Full text URL: http://dx.doi.org/10.1088/0022-3727/32/18/301

Abstract

Interaction of CO2, Nd:YAG, excimer and high-power diode laser radiation with the surface of a common mild steel (EN8) was found to effect changes in the wettability characteristics of the steel, namely changes in the measured contact angle of certain liquids. Such changes were identified as being due to modifications to (i) the surface roughness, (ii) changes in the surface oxygen content and (iii) changes in the surface energy of the mild steel. However, it was found that changes in the wettability characteristics of the mild steel were predominantly influenced by the surface roughness. To a much lesser extent surface O2 content is also thought to play a role. The work has shown that the wettability characteristics of the selected mild steel could be controlled and/or modified with laser surface treatment. Moreover, the findings of this work strongly indicate the existence of a relationship between the change of the wetting properties of the mild steel and the laser wavelength.

Item Type:Article
Additional Information:Interaction of CO2, Nd:YAG, excimer and high-power diode laser radiation with the surface of a common mild steel (EN8) was found to effect changes in the wettability characteristics of the steel, namely changes in the measured contact angle of certain liquids. Such changes were identified as being due to modifications to (i) the surface roughness, (ii) changes in the surface oxygen content and (iii) changes in the surface energy of the mild steel. However, it was found that changes in the wettability characteristics of the mild steel were predominantly influenced by the surface roughness. To a much lesser extent surface O2 content is also thought to play a role. The work has shown that the wettability characteristics of the selected mild steel could be controlled and/or modified with laser surface treatment. Moreover, the findings of this work strongly indicate the existence of a relationship between the change of the wetting properties of the mild steel and the laser wavelength.
Keywords:CO2 laser, Nd:YAG laser, excimer laser, high power diode laser (HPDL), surface
Subjects:H Engineering > H680 Optoelectronic Engineering
H Engineering > H700 Production and Manufacturing Engineering
Divisions:College of Science > School of Engineering
ID Code:3174
Deposited By: Rosaline Smith
Deposited On:05 Aug 2010 16:49
Last Modified:13 Mar 2013 08:44

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