abstract
Phosphate coated zinc commercial plates (Anthra-Zinc (R)) have been processed by laser ablation in the nanosecond pulsed regime varying the repetition rate at 10, 20 and 50 kHz. Phosphate coating was completely characterized. By monitoring the fluence it was possible to define three different processing regimes: phosphate ablation (up to 116 J/cm2), zinc ablation (up to 288 J/cm2) and zinc melting (at 375 J/cm2). 3D profilometry was used to assess both the roughness and depth parameters corresponding to each regime. The brightness was estimated from 450 to 800 nm by reflectance studies. Consequently, a long-lasting grey scale was attained envisaging in- and outdoor decorative uses.
keywords
THIN-FILMS; CONVERSION COATINGS; STEEL; DEPOSITION; ALLOYS; PULSES; LAYERS; AL
subject category
Optics
authors
Rey-Garcia, F; Costa, FM; Fernandes, AJS; Oliveira, FJ; Rino, L; Bao-Varela, C
our authors
Filipe José Alves de Oliveira
Principal Researcheracknowledgements
This work was developed within the scope of the projects I3N - Institute of Nanostructures, Nanomodelling and Nanofabrication, POCI-01-0145-FEDER-007688 (FCT Ref. UID/CTM/50025/2013), and of CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. F. Rey-Garcia acknowledges the Portuguese Science and Technology Foundation (FCT) for the SFRH/BPD/108581/2015 grant. We want to acknowledge Celia Freitas for their technical support with the Sensofar equip.