ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The surface roughness and morphology of the ceramic coatings fabricated on industriallypure aluminum by the plasma electrolytic oxidation (PEO) technique with a hetero-polar pulsedcurrent ceramic synthesizing system were investigated. A model for the process was established.Based on this a formula was deduced to estimate the temperature rise rate at the correspondinglocations before the plasma discharge channels have formed during the PEO process, and thechannels’ temperature when the plasma discharges occur. Results show that the PEO ceramiccoatings grow by an alternating coating melting and solidifying way; The coating roughness becomesgreater and the plasma discharge channel population in the ceramic coatings decreases while the poresenlarge with PEO treatment time and current. With the deduced formula, the PEO alumina coating onindustrially pure aluminum was taken as an example for validation of the model
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1135.pdf
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