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3D transient thermal modelling of laser microchannel fabrication in lime-soda glass

Issa, Ahmed A.A. and Brabazon, Dermot and Hashmi, Saleem (2008) 3D transient thermal modelling of laser microchannel fabrication in lime-soda glass. Journal of Materials Processing Technology, 207 (1-3). pp. 307-314. ISSN 0924-0136

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Abstract

Laser-fabricated microchannels in glass offer a wide range of bioengineering and telecommunication applications. A 1.5 kW CO2 laser with 10.6 μm wavelength was used in this study to fabricate micorchannels on the surface of soda-lime glass sheets. A thermal model of the process was developed based on transient heat conduction due to a pulsed heat input. The resulting equation predicted the temperature distribution in the regions surrounding the laser focus. Temperature – time curves were drawn from those equations, which were useful in estimating the thermal history in the processed samples. The temperature distribution was also used to predict the channel geometry (based on the vaporisation temperature of glass). Most of the laser power used was consumed in bringing the glass to the vaporisation temperature. The model was able to predict the channel width, depth and surface roughness. These laser-fabricated channel characteristics were measured and compared to the results obtained from the thermal model. The laser power, frequency, pulse width and translation speed were the control parameters in both studies; hence a direct comparison was established between the model and the experimental results.

Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:CO2 laser; Glass; Microchannels; Thermal modelling
Subjects:Engineering > Materials
Engineering > Mechanical engineering
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Publisher:Elsevier
Official URL:http://dx.doi.org/10.1016/j.jmatprotec.2008.06.056
Copyright Information:© 2008 Elsevier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:20057
Deposited On:29 Jul 2014 10:46 by Shadi Karazi. Last Modified 25 Nov 2016 16:29

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