Affiliation:
1. Faculty of Materials Science & Engineering, Warsaw University of Technology, Warsaw, Poland
2. Pathology Department, Children's Memorial Health Institute, Warsaw, Poland
Abstract
Aim: The goal was to improve the properties of NiTi shape memory alloy to make it suitable for cardiac applications. For this purpose, a hybrid a-CNH+TiO2+TiN-type surface layer was produced on NiTi alloy and characterized. Materials & methods: The NiTi alloy subjected to hybrid process combining low-temperature oxynitriding under glow discharge conditions and radio frequency chemical vapor deposition process was examined for microstructure, surface topography, corrosion resistance, wettability and surface-free energy, Ni ion release and platelets adhesion, aggregation and activation. Results: The hybrid surface layers showed slightly increased surface roughness, better corrosion resistance, a more hydrophobic nature, decreased surface free energy, smaller release of nickel ions and reduced platelets activation. Conclusion: The produced layers could expand the range of NiTi medical applications.
Subject
Development,General Materials Science,Biomedical Engineering,Medicine (miscellaneous),Bioengineering
Cited by
13 articles.
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