Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/712
Título: Multi-scaled femtosecond laser structuring of stationary titanium surfaces
Autor: Oliveira, V.
Cunha, A.
Vilar, Rui
Palavras-chave: Titanium
Femtosecond laser
Surface structuring
Data: Mar-2010
Editora: Natl Inst Optoelectronics
Citação: Oliveira V, Cunha A, Vilar R. Multi-scaled femtosecond laser structuring of stationary titanium surfaces. Journal of Optoelectronics and Advanced Materials. 2010; 12 (3): 654-658.
Relatório da Série N.º: 3
Resumo: 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/cm(2), while microcolumns form during the first 200 pulses for fluences between (0.6+/-0.2) and (1.7+/-0.2) J/cm(2). A wavy topography develops for fluences and number of pulses higher than (1.7+/-0.2) J/cm(2) 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 ripple
Peer review: yes
URI: http://hdl.handle.net/10400.21/712
ISSN: 1454-4164
Aparece nas colecções:ISEL - Eng. Mecan. - Artigos

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