期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 111, 期 -, 页码 179-187出版社
ELSEVIER
DOI: 10.1016/j.colsurfb.2013.05.040
关键词
Mg alloy; Chitosan; Calcium phosphate coating; Degradable behavior; Bioactivity
资金
- Natural Science Foundation of China [51042012, 51272058]
The degradation behavior of a MAO-A2910 with a calcium phosphate/chitosan composite coating in the modified simulated human body fluid (m-SBF) was investigated by immersion experiments and electrochemical impedance spectroscopy. The compositions of the composite coating soaked in the m-SBF for different time intervals were studied by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, thermo-gravimetric analysis and differential thermal analysis. The microstructures of the composite coating at different soaking stages were observed by using a scanning electron microscope. Results show that the as-prepared composite coating could slow down the corrosion rate of the AZ910 alloy and it demonstrated good bioactivity in the m-SBF. The coating's morphology changed from a flake-like one into a spherical-shaped one with the increase of immersion time in the m-SBF. (C) 2013 Published by Elsevier B.V.
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