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Characteristics of CeO2/ZrO2-HA composite coating on ZK60 magnesium alloy

Published online by Cambridge University Press:  13 February 2017

Ying Xiong*
Affiliation:
Key Laboratory of Special Purpose Equipment and Advanced Manufacture Technology, Ministry of Education, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
Xiaxia Hu
Affiliation:
Key Laboratory of Special Purpose Equipment and Advanced Manufacture Technology, Ministry of Education, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
Renguo Song
Affiliation:
School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China; and Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, Jiangsu, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

A CeO2/ZrO2-hydroxyapatite (HA) composite bio-ceramic coating was prepared on ZK60 magnesium (Mg) alloy by using micro-arc oxidation (MAO) and electrophoretic deposition (EPD). MAO coating was done as the basal layer was grown in alkaline electrolyte with the addition of nanoparticles (CeO2 and ZrO2) to improve the mechanical properties of coating. A HA coating as the covering layer was deposited on the surface of MAO coating for improving the biological properties of the coating. The phase compositions and morphology of coatings were monitored with X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Adhesion and wear resistance of coatings were evaluated using a scratch test and a pin-on-disc sliding wear test. The corrosion resistance of coatings was evaluated in a simulated body fluid (SBF) using electrochemical tests at 36.5 ± 0.5 °C. The experimental results showed that the CeO2/ZrO2-HA composite coating on Mg alloy effectively improved its mechanical properties and corrosion resistance. Combining MAO and EPD is a promising modification technology for degradable Mg alloys as biomaterials.

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Articles
Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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