期刊
SURFACE & COATINGS TECHNOLOGY
卷 317, 期 -, 页码 125-133出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2017.03.034
关键词
Graphene oxide; Hydroxyapatite; Magnesium alloy; Micro-arc oxidation; Composite coating
资金
- National Natural Science Foundation of China [51301039]
- Natural Science Foundation of Fujian Province [2016J01214]
- Public Institutes Special Fund Project of Fujian Province [2016R1009-6]
- Expensive Equipment Open Test Fund of Fuzhou University [2017T006]
A biodegradable hydroxyapatite/graphene oxide bio-composite (HA/GO) coating has been fabricated on magnesium (Mg) alloy by a convenient one-step method of micro-arc oxidation (MAO) for biodegradable implants. The microstructure and phase constituents of the obtained powders and coatings were characterized by XRD, SEM, TEM, FT-IR, XPS and the corrosion resistance in vitro has been investigated by electrochemical measurements in simulated body fluid (SBF). The results suggested that HA/GO powder has been successfully prepared and filled into the discharging pores of the coating during MAO process. The electrochemical measurements in SBF indicated that the corrosion current of Mg substrate has been significantly decreased by the HA/GO coating. Furthermore the EIS measurement suggested that the HA/GO coating more effectively inhibited the Mg substrate from corrosion compared to pure MAO coating. These results suggested that HA/GO coating on Mg alloy could be a promising candidate for biomedical application. (C) 2017 Elsevier B.V. All rights reserved.
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