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Title: Effects of nanosecond laser ablation parameters on surface modification of carbon fiber reinforced polymer composites
Authors: İplikçi, Hande
Barışık, Murat
Türkdoğan, Ceren
Martin, Seçkin
Yeke, Melisa
Nuhoğlu, Kaan
Esenoğlu, Gözde
Tanoğlu, Metin
Aktaş, Engin
Dehneliler, Serkan
İriş, Mehmet Erdem
Keywords: Heat transfer
Nanosecond laser ablation
Selective removal of epoxy
Surface treatment for adhesive bonding
Carbon fiber reinforced plastics
Carbon fibers
Publisher: SAGE Publications
Abstract: Removal of contaminants and top polymer layer from the surface of carbon-fiber-reinforced polymer (CFRP) composites is critical for high-quality adhesive-joining with direct bonding to the reinforcing fiber constituents. Surface treatment with a laser beam provides selective removal of the polymer matrix without damaging the fibers and increasing the wettability. However, inhomogeneous thermal properties of CFRP make control of laser ablation difficult as the laser energy absorbed by the carbon fibers is converted into heat and transmitted through the fiber structures during the laser operation. In this study, the effect of scanning speed and laser power on nanosecond laser surface treatment was characterized by scanning electron microscope images and wetting angle measurements. Low scanning speeds allowed laser energy to be conducted as thermal energy through the fibers, which resulted in less epoxy matrix removal and substantial thermal damage. Low laser power partially degraded the epoxy the surface while the high power damaged the carbon fibers. For the studied CFRP specimens consisting of unidirectional [45/0/?45/90]2s stacking of carbon/epoxy prepregs (HexPly®-M91), 100 mJ/mm2 generated by 10 m/s scanning speed and 30 W power appeared as optimum processing parameters for the complete removal of epoxy matrix from the top surface with mostly undamaged carbon fibers and super hydrophilic surface condition. © The Author(s) 2023.
ISSN: 0021-9983
Appears in Collections:Civil Engineering / İnşaat Mühendisliği
Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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