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Improving the bond strength of metal-FRP-hybrids with thermal sprayed copper using pulsed laser-based processing approaches

: Gebauer, Jana; Franke, Volker; Gustke, Kevin; Lampke, Thomas; Lasagni, Andrés-Fabián

Wissenschaftliche Gesellschaft Lasertechnik -WLT-:
Lasers in Manufacturing Conference 2021. Proceedings : June 21 - 24, 2021, held virtually, part of the World of Photonics Congress
Erlangen: WLT, 2021
8 S.
Lasers in Manufacturing Conference (LiM) <2021, Online>
World of Photonics Congress <2021, Online>
Sächsische Aufbaubank - Förderbank SAB
European Structural Fonds; 10034532
Sächsische Aufbaubank - Förderbank SAB
European Structural Fonds; 100343527
Fraunhofer IWS ()
surface functionalization; pulsed laser; fiber reinforced plastic; metal-plastic hybrid; coating deposition

Ablation processes during laser treatment of carbon fiber-reinforced plastics (CFRP) with pulsed lasers of various wavelengths and pulse durations are investigated. Three different surface pre-treatment strategies are used, including laser-roughening, selective matrix removal and laser micro structuring. Various ablation mechanisms, including evaporation and photochemical ablation are reported, dlepending on the employed laser source. Selected laser structured substrates w ere coated with copper by a wire arc spraying process. Bonding strengths up to 18.7 ± 2.0 MPa were achieved in shear tensile tests, by the combination of the roughening process and the micro-structuring approach. Consequently, the bonding strength could be increased over~ 180 % compared to the common pre-treatment by mechanical blasting.