Properties of titanium-alloyed DLC layers for medical applications

DLC-type layers offer a good potential for application in medicine, due to their excellent tribological properties, chemical resistance, and bio-inert character. The presented study has verified the possibility of alloying DLC layers with titanium, with coatings containing three levels of titanium c...

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Bibliographic Details
Published in:Biomatter (Austin, TX) TX), 2014, Vol.4 (1), p.e29505
Main Authors: Joska, Ludek, Fojt, Jaroslav, Cvrcek, Ladislav, Brezina, Vitezslav
Format: Article
Language:English
Subjects:
Alloys - chemistry
Biomedical Technology
Body Fluids - chemistry
Calcium - chemistry
Carbon - chemistry
Cell Line, Tumor
Coated Materials, Biocompatible - chemistry
Electric Impedance
Humans
Materials Testing
Phosphorus - chemistry
Surface Properties
Titanium - chemistry
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Summary:DLC-type layers offer a good potential for application in medicine, due to their excellent tribological properties, chemical resistance, and bio-inert character. The presented study has verified the possibility of alloying DLC layers with titanium, with coatings containing three levels of titanium concentration prepared. Titanium was present on the surface mainly in the form of oxides. Its increasing concentration led to increased presence of titanium carbide as well. The behavior of the studied systems was stable during exposure in a physiological saline solution. Electrochemical impedance spectra practically did not change with time. Alloying, however, changed the electrochemical behavior of coated systems in a significant way: from inert surface mediating only exchange reactions of the environment in the case of unalloyed DLC layers to a response corresponding rather to a passive surface in the case of alloyed specimens. The effect of DLC layers alloying with titanium was tested by the interaction with a simulated body fluid, during which precipitation of a compound containing calcium and phosphorus--basic components of the bone apatite--occurred on all doped specimens, in contrast to pure DLC. The results of the specimens' surface colonization with cells test proved the positive effect of titanium in the case of specimens with a medium and highest content of this element.
ISSN:2159-2535
2159-2527
2159-2535
DOI:10.4161/biom.29505