Novel procedure for studying laser-surface material interactions during scanning laser ablation cleaning processes on Cu-based alloys

Elisabetta Di Francia (1) , Ruth Lahoz (2) , Delphine Neff (3, 4) , Victor Rico (5) , Nicolas Nuns (6) , Emma Angelini (1) , Sabrina Grassini (1)

1 Polito - Politecnico di Torino = Polytechnic of Turin
2 INMA - Instituto de Nanociencia y Materiales de Aragón
3 LAPA - UMR 3685 - Laboratoire Archéomatériaux et Prévision de l'Altération
4 IRAMAT-LAPA - IRAMAT - Laboratoire Archéomatériaux et Prévision de l'Altération
5 ICMSE - Instituto de Ciencia de Materiales de Sevilla
6 IMEC - Institut Michel Eugène Chevreul - FR 2638

Laser ablation is an effective method to clean Cu-based alloys. A novel procedure of characterisation was developed involving 18O isotopes evaluated by ToF-SIMS spectroscopy to assess the driving mechanisms of laser-surface interactions. The presence of re-oxidised compounds was detected, discerning between the oxygen from the corrosion layer and the one introduced by the interaction with the laser (that was generated in a controlled atmosphere of 18O diluted in N2). A set of samples treated with different laser conditions were characterised by FESEM and μRaman. The results have shown that re-oxidation phenomenon can occur and its selectivity depends on the laser conditions.

Keywords: Laser ablation; Copper alloys; Corrosion; Surface interaction mechanisms; ToF-SIMS

Domains: Material chemistry

Elisabetta Di Francia, Ruth Lahoz, Delphine Neff, Victor Rico, Nicolas Nuns, et al.. Novel procedure for studying laser-surface material interactions during scanning laser ablation cleaning processes on Cu-based alloys. Applied Surface Science, 2021, 544, pp.148820. ⟨10.1016/j.apsusc.2020.148820⟩. ⟨cea-03748815⟩