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Advisor(s)
Abstract(s)
In the present work, we investigate the surface treatment of carbon fiber-reinforced polymer (CFRP) composites by laser ablation with femtosecond laser radiation. For this purpose, unidirectional carbon fiber-reinforced epoxy matrix composites were treated with femtosecond laser pulses of 1024 nm wavelength and 550 fs duration. Laser tracks were inscribed on the material surface using pulse energies and scanning speeds in the range 0.1-0.5 mJ and 0.1-5 mm/s, respectively. The morphology of the laser treated surfaces was investigated by field emission scanning electron microscopy. We show that, by using the appropriate processing parameters, a selective removal of the epoxy resin can be achieved, leaving the carbon fibers exposed. In addition, sub-micron laser induced periodic surface structures (LIPSS) are created on the carbon fibers surface, which may be potentially beneficial for the improvement of the fiber to matrix adhesion in adhesive bonds between CFRP parts.
Description
Keywords
CFRP composites Surface treatment Femtosecond laser
Citation
OLIVEIRA, Vítor Manuel [et al] - Surface treatment of CFRP composites using femtosecond laser radiation. Optics and Lasers in Engineering. ISSN 0143-8166. Vol. 94 (2017), pp. 37-43
Publisher
Elsevier