Bioceramic Coating Produced on AZ80 Magnesium Alloy by One-Step Microarc Oxidation Process
- Zhejiang University of Technology, Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education, College of Mechanical Engineering (China)
- Changzhou University, School of Materials Science and Engineering (China)
A self-sealing bioceramic coating was prepared on AZ80 magnesium alloy by one-step microarc oxidation (MAO) in an alkaline silicate solution in the presence of HA nanoparticles and K{sub 2}TiF{sub 6}. The influence of oxidation time on the microstructure and corrosion resistance was investigated. The surface and cross-sectional morphologies of the coatings were characterized by scanning electron microscopy, while their phase structure and chemical composition were obtained by x-ray diffraction analysis and energy-dispersive spectroscopy, respectively. The corrosion behavior of the coatings was evaluated by electrochemical measurements in a simulated body fluid. The results show that the self-sealing bioceramic coatings are mainly composed of MgO, MgF{sub 2}, Ti{sub 3}O{sub 5}, Mg{sub 2}SiO{sub 4}, and HA phases, which effectively improve the corrosion resistance of the AZ80 magnesium alloy. The added K{sub 2}TiF{sub 6} plays a key role in producing self-sealing coating, while the HA nanoparticles improve the bioactivity of the coating. Thus, the self-sealing bioceramic coating obtained by the one-step MAO process may develop into a suitable surface treatment technology for bone implants in clinical application.
- OSTI ID:
- 22970897
- Journal Information:
- Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 3 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
- Country of Publication:
- United States
- Language:
- English
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