Aluminum 6061 samples were exposed to the jet of an atmospheric pressure rotating arc discharge operated in either nitrogen or air. After multiple passes of treatment with an air-based plasma jet at very short source-to-substrate distances, scanning electron microscopy combined with x-ray photoelectron spectroscopy revealed a highly porous micro-roughened alumina-based structure on the surface of aluminum. Based on optical emission spectroscopy and high-speed optical imaging of the jet interacting with aluminum samples, it was found that the process is mainly driven by the energy transfer from the plasma source to the surface through transient plasma-transferred arcs. The occurrence of multiple arc discharges over very short time scales can induce rapid phase transformations of aluminum with characteristics similar to the ones usually observed during laser ablation of materials with femto- to nanosecond laser pulses or during the formation of cathode spots on the surface of metals.
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21 February 2018
Research Article|
February 21 2018
Highly porous micro-roughened structures developed on aluminum surface using the jet of rotating arc discharges at atmospheric pressure
Siavash Asadollahi;
Siavash Asadollahi
1
Canada Research Chair on Atmospheric Icing Engineering of Power Networks (INGIVRE), Université du Québec à Chicoutimi
, Chicoutimi G7H 2B1, Québec, Canada
2
Groupe de Physique des Plasmas, Département de Physique, Université de Montréal
, Montréal H3C 3J7, Québec, Canada
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Masoud Farzaneh;
Masoud Farzaneh
1
Canada Research Chair on Atmospheric Icing Engineering of Power Networks (INGIVRE), Université du Québec à Chicoutimi
, Chicoutimi G7H 2B1, Québec, Canada
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Luc Stafford
Luc Stafford
a)
2
Groupe de Physique des Plasmas, Département de Physique, Université de Montréal
, Montréal H3C 3J7, Québec, Canada
a)Author to whom correspondence should be addressed: luc.stafford@umontreal.ca
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a)Author to whom correspondence should be addressed: luc.stafford@umontreal.ca
J. Appl. Phys. 123, 073302 (2018)
Article history
Received:
September 07 2017
Accepted:
January 19 2018
Citation
Siavash Asadollahi, Masoud Farzaneh, Luc Stafford; Highly porous micro-roughened structures developed on aluminum surface using the jet of rotating arc discharges at atmospheric pressure. J. Appl. Phys. 21 February 2018; 123 (7): 073302. https://doi.org/10.1063/1.5003831
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