| DOI | Resolve DOI: https://doi.org/10.1016/j.surfcoat.2013.03.041 |
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| Author | Search for: Dehnavi, V.; Search for: Luan, B.L.1; Search for: Shoesmith, D.W.; Search for: Liu, X.Y.1; Search for: Rohani, S. |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Subject | alkaline electrolytes; concentration distributions; duty cycle; electrical parameter; elemental distribution; frequency; plasma electrolytic oxidation; pulsed direct current; aluminum; ceramic coatings; energy dispersive spectroscopy; oxidation; plasmas; scanning electron microscopy; electrolysis |
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| Abstract | Ceramic coatings were created on the surface of 6061 aluminum alloy using a plasma electrolytic oxidation (PEO) process employing a pulsed direct current (DC) power mode in an alkaline electrolyte. The effect of electrical parameters including frequency and duty cycle on the microdischarge behavior and coating growth was investigated at constant current. Surface features of coatings were studied using scanning electron microscopy. Energy dispersive spectroscopy was employed to investigate elemental distribution on the coating surfaces and cross-sections. Applying lower duty cycles was found to result in increased breakdown voltages and microdischarges with higher spatial density and lower intensity. Further, applying a lower duty cycle was also found to promote the uniformity of silicon distribution in the coating. Based on these new findings, a new conceptual model is proposed to explain the concentration distribution of Si on the surface of coatings prepared at different duty cycles. © 2013 . |
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| Publication date | 2013 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21270706 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | de47f0a1-00c9-44a0-8033-38d15eba8890 |
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| Record created | 2014-02-17 |
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| Record modified | 2020-04-22 |
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