RT Journal Article
T1 Nanosecond, picosecond and femtosecond laser surface treatment of magnesium alloy: role of pulse length
A1 Pou Alvarez, Pablo
A1 Riveiro Rodríguez, Antonio
A1 Nóvoa Rodríguez, Xosé Ramón
A1 Fernández Arias, Mónica
A1 Del Val Garcia, Jesús
A1 Comesaña Piñeiro, Rafael
A1 Boutinguiza Larosi, Mohamed
A1 Lusquiños Rodríguez, Fernando
A1 Pou Saracho, Juan María
K1 3310 Tecnología Industrial
K1 2209.10 láseres
K1 3303.07 Tecnología de la Corrosión
AB Despite having a whole range of applications as in weight-saving structures, biodegradable implants and rechargeable batteries, the usage of magnesium is still hindered by its high tendency to corrosion. Pulsed laser treatments are an interesting approach to modify the surface of magnesium aiming the improvement of the corrosion properties as well as the generation a controlled roughness, which is useful for improving coatings adhesion or tailoring the interactions with living cells at the surface of an implant. In this work, a novel study on the role of the pulse length on topography and corrosion properties of AZ31 magnesium alloy laser-treated surfaces is presented. Three different laser sources with pulse lengths of 20 ns, 800 ps and 266 fs were employed with a similar experimental setup. Surface topography analysis revealed a reduction of the amount of melt generated and an increase in the aspect ratio (depth/width) of the ablated features as the pulse length is reduced. All three treatments significantly improved the corrosion performance of the untreated base material. Thicker and more homogenously distributed recast material for the longer pulses of the nanosecond treatment resulted in a longer-lasting protection (11–12 fold reduction in mass loss rate vs base material) compared to the pico- and femtosecond treatments (4–5 fold reduction)
PB Surface and Coatings Technology
SN 02578972
YR 2021
FD 2021-12-15
LK http://hdl.handle.net/11093/2676
UL http://hdl.handle.net/11093/2676
LA eng
NO Surface and Coatings Technology, 427, 127802 (2021)
NO Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG
NO Ministerio de Ciencia e Innovación | Ref. PID2020-117900RB-I00
DS Investigo
RD 12-sep-2024