2013 | |
Articles: | |
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8626
2013
ISSN: 0277-786X
DOI: 10.1117/12.2010105
Equipe: Centre de Compétences : X-Gamma rayons X et spectroscopie |
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SYMMETRY-BASEL,
5(4):344-354
2013
ISSN: 2073-8994
DOI: 10.3390/sym5040344
Equipe: Département P2M : Surfaces et Spectroscopies |
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Surface and Coatings Technology,
221:70
2013
Resume: The plasma electrolytic oxidation (PEO) of aluminium alloys is investigated for different electrical working conditions using a pulsed bipolar current supply. A particular attention is paid to the effect of the anodic current density (from 10 to 90 A dm-2) and current pulse frequency (from 100 to 900 Hz) on the resulting oxide layer. Micro-discharges are characterized during the process by means of fast video imaging with a time and a space resolution of 8 μs and 0.017 mm2, respectively. Correlations are established between themicro-discharge characteristics (surface density, lifetime and size) and the elaborated oxide layers (morphology, growth rate and surface roughness). The highest coating growth rate measured (2.1 μm min-1) is achieved with the combination of the highest current density (75.7 A dm-2) and the highest current pulse frequency (900 Hz). Within these specific current conditions it is concluded that the detrimental effects of numerous micro-discharges are minimized. The results also show that the surface roughness may be largely affected by the presence of long-lived and large micro-discharges which develop over the processed surface. The strongest micro-discharges (live duration up to 0.3 ms and cross-sectional area up to 1 mm2) are mainly observed with the combination of the highest current density (75.7 A dm-2) and the lowest current pulse frequency (100 Hz). Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS |
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Physical Review B - Condensed Matter and Materials Physics,
88(10)
2013
Equipe: Département P2M : Nanomagnétisme et Electronique de Spin |
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IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,
60(10):2039-2043
2013
Equipe: Centre de Compétences : MiNaLor micro et nanotechnologies |
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Sensors and Actuators, B: Chemical,
185:309-320
2013
Equipe: Centre de Compétences : MiNaLor micro et nanotechnologies |
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NATURE COMMUNICATIONS,
4
2013
ISSN: 2041-1723
DOI: 10.1038/ncomms3800
Equipe: Département P2M : Surfaces et Spectroscopies |
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JOURNAL OF PHYSICS-CONDENSED MATTER,
25
2013
ISSN: 0953-8984
Equipe: Centre de Compétences : X-Gamma rayons X et spectroscopie |
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Acta Materialia,
61:3758-3768
2013
Equipe: Département SI2M : Microstructures et Contraintes |
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Metallurgical and Materials Transactions A,
44 (2):1059-1073
2013
Equipe: Département SI2M : Microstructures et Contraintes |