"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Multi-scaled femtosecond laser structuring of stationary titanium surfaces

V. OLIVEIRA1,2,* , A. CUNHA2,3, R. VILAR2,3

Affiliation

  1. Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emídio Navarro no. 1, 1959-007 Lisbon, Portugal
  2. ICEMS – Instituto de Ciências e Engenharia de Materiais, Av. Rovisco Pais no. 1, 1049-001 Lisbon, Portugal
  3. Dep. Engenharia de Materiais, Instituto Superior Técnico, Av. Rovisco Pais no. 1, 1049-001 Lisbon, Portugal

Abstract

The evolution of the topography of titanium surfaces treated with femtosecond laser radiation in stationary conditions as a function of radiation fluence and number of laser pulses is investigated. Depending on the processing parameters, ripples, microcolumns, wavy or smooth surfaces can be obtained. The ripples predominate for fluences near the damage threshold of titanium (0.2±0.1) J/cm², while microcolumns form during the first 200 pulses for fluences between (0.6±0.2) and (1.7±0.2) J/cm2 . A wavy topography develops for fluences and number of pulses higher than (1.7±0.2) J/cm2 and 300, respectively. A bimodal surface topography consisting of surface ripples overlapping a microcolumnar topography can be obtained if the surfaces are firstly treated to create microcolumns followed by laser treatment with a lower fluence near the ablation threshold of the material, in order to generate periodic ripples..

Keywords

Titanium, Femtosecond laser, Surface structuring.

Submitted at: June 30, 2009
Accepted at: Feb. 27, 2010

Citation

V. OLIVEIRA, A. CUNHA, R. VILAR, Multi-scaled femtosecond laser structuring of stationary titanium surfaces, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 3, pp. 654-658 (2010)