Abstract
The surface of Ti–6Al–4V alloy was modified by Plasma Electrolytic Oxidation and hydrothermal processing. The morphology, specific surface area and anti-bacterial activities of the surfaces produced for different modes of the treatment were compared to those of pristine Ti–6Al–4V. It was found that 20 min of PEO followed by 4 h of hydrothermal processing at pH = 11 produced a maximum amount of hydroxyapatite in the surface layer. The specific surface area of the alloys increases very moderately after PEO and dramatically after hydrothermal processing, especially at pH = 11. The development of Staphylococcus epidermidis is suppressed by the titanium dioxide formed by PEO. In contrast, hydroxyapatite formed by hydrothermal treatment at pH = 7 favors the growth of the bacteria. If hydrothermal processing was performed at pH = 11, hydroxyapatite negligibly affects the growth of S. epidermidis, as compared to the pristine alloy.
| Original language | English |
|---|---|
| Pages (from-to) | 80-84 |
| Number of pages | 5 |
| Journal | Surface and Coatings Technology |
| Volume | 301 |
| DOIs | |
| State | Published - 1 Sep 2016 |
Keywords
- Antibacterial activity
- Biomaterials
- Hydroxyapatite
- Oxide layers
- Plasma Electrolytic Oxidation
- Titanium implants