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Title: |
The Effect of Treating Frequency on Characteristics of Pure Titanium MAO Coating |
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Source: |
Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)
(pp 650-653)
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Author(s): |
Jian-bo Wang, School of Science, Changchun University of Science and Technology, Changchun China
Jun Lu, School of Science, Changchun University of Science and Technology, Changchun China
Xin-yi Cheng, School of Science, Changchun University of Science and Technology, Changchun China
Guan-cheng Sun, School of Science, Changchun University of Science and Technology, Changchun China |
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Abstract: |
Using a multifunctional pulse power supply, porous titania coatings were prepared on pure titanium substrates in a Na2CO3 and Na2SiO3 electrolytic solution by microarc oxidation (MAO) under constant voltage. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize the coating phase composition and microstructure, respectively. The effects of the treating frequency (500-8000Hz) on the coating thickness, phase composition and surface morphology were studied. The experimental results show: (1) the coating consists of dominant rutile and anatase phases, which are invariable with the treating frequency, and a little Ti6O11 phase; and (2) the coating thickness, surface morphology, and Ti6O11 phase depend strongly on the treating frequency. With the increasing of treating frequency, the coating thickness decreases swiftly, Ti6O11 phase disappears gradually, and the size of micropores existing on the coating surface decreases by degrees, while the pore number increases little by little.
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