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CFRP bonding pre-treatment with laser radiation of 3 μm wavelength: Laser/material interaction

: Blass, D.; Kreling, S.; Nyga, S.; Westphalen, T.; Jungbluth, B.; Hoffman, H.-D.; Dilger, K.


Klotzbach, U. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser-Based Micro- and Nanoprocessing X : 16-18 February 2016, San Francisco, California
Bellingham, WA: SPIE, 2016 (SPIE Proceedings Series 9736)
ISBN: 978-1-628-41971-9
ISBN: 978-1-62841-971-9
Art. 973614, 11 pp.
Conference "Laser-Based Micro- and Nanoprocessing" <10, 2016, San Francisco/Calif.>
Conference Paper
Fraunhofer ILT ()

Laser radiation of 3 μm wavelength was generated by frequency conversion of an industrial IR laser and applied in the context of CFRP bonding pre-treatment. Reinforced and non-reinforced epoxy resins were treated with this radiation varying the relevant parameters such as laser power or treatment time. The interaction between laser radiation of 3012 nm and 1064 nm wavelength and matrix resin was analyzed mechanically (e.g. ablation depth), optically (such as fiber exposure) and chemically (e.g. contamination removal). The results gathered show that, even with the small achievable pulse fluences, a sufficient treatment of the specimens and a sensitive removing of the contaminated layers are possible.