RT Journal Article
T1 High contrast laser marking of alumina
A1 Penide Durán, Joaquín
A1 Quintero Martínez, Félix
A1 Riveiro Rodríguez, Antonio
A1 Fernández Álvarez, Antonio
A1 Del Val Garcia, Jesús
A1 Comesaña Piñeiro, Rafael
A1 Lusquiños Rodríguez, Fernando
A1 Pou Saracho, Juan María
K1 3307.07 Dispositivos láser
K1 2209.10 láseres
K1 22 Física
AB Alumina serves as raw material for a broad range of advanced ceramic products. These elements should usually be identified by some characters or symbols printed directly on them. In this sense, laser marking is an efficient, reliable and widely implemented process in industry. However, laser marking of alumina still leads to poor results since the process is not able to produce a dark mark, yielding bad contrast.  In this paper, we present an experimental study on the process of marking alumina by three different lasers working in two wavelengths: 1064 nm (Near-infrared) and 532 nm (visible, green radiation). A colorimetric analysis has been carried out in order to compare the resulting marks and its contrast. The most suitable laser operating conditions were also defined and are reported here. Moreover, the physical process of marking by NIR lasers is discussed in detail. Field Emission Scanning Electron Microscopy, High Resolution Transmission Electron Microscopy and X-ray Photoelectron Spectroscopy were also employed to analyze the results. Finally, we propose an explanation for the differences of the coloration induced under different atmospheres and laser parameters. We concluded that the atmosphere is the key parameter, being the inert one the best choice to produce the darkest marks.
PB Applied Surface Science
SN 01694332
YR 2015
FD 2015-05-01
LK http://hdl.handle.net/11093/6867
UL http://hdl.handle.net/11093/6867
LA eng
NO Applied Surface Science, 336, 118-128 (2015)
NO Xunta de Galicia  | Ref. CN2012/292
DS Investigo
RD 13-dic-2024