Publication Date:
2017-05-13
Description:
Ag-containing bioactive glass films (Ag/Ca atomic ratios of 0, 5% and 10%) were sol-gel prepared for bioactive and antibacterial modification of titanium. The gel powders calcined at 610 °C are mainly amorphous confirmed by x-ray diffraction, but small diffraction peaks of Ca 3 SiO 5 and silver are detected. The film surface is porous with the pore size of ~200 nm. Silver-rich sub-micro particles with sizes of 100-480 nm are present at the surface of Ag-glass films. CaP phase, metallic silver and silica are detected by x-ray photoelectron spectroscopy. The mean apparent bonding strength of the films is as high as 21±1 MPa measured by the pull-off test. The potentiodynamic polarization test shows that the coated samples have better corrosion resistance than the polished sample. The Ag-glass coatings and their wafer samples exhibit antibacterial activity against S. aureus . The coated samples are covered by apatite layer after soaked in the simulated body fluid for 2 weeks, demonstrating their bioactivity. This article is protected by copyright. All rights reserved.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
