Authors:
Marta Ceroni (Politecnico di Torino, Italy),
Lorenza Maddalena (Politecnico di Torino, Italy),
Marco Actis Grande (Politecnico di Torino, Italy)
Abstract:
Cu powders show high reflectivity when exposed to a laser having wavelengths in the range of 1064-1080 nm, hindering the processability when manufacturing by red-light laser powder bed fusion. Green or blue lasers help overcoming this issue, as well as the change of the chemical composition of the powder. However, other approaches may also be used. The present paper analyses the effect of coatings applied on elemental Cu-powders on the absorbance of the resulting material. Different amounts of Graphite Oxide have been deposited on the surface of metal powders by a nanocoating approach. The prepared powders have been characterized evaluating the absorbance in the red, green, and blue light wavelengths using UV-Vis spectroscopy. The uniformity of GO coating was also evaluated by scanning electron microscopy and Raman spectroscopy.
DOI:
https://doi.org/10.59499/WP225372154