Demonstrates improved corrosion resistance and reduced platelet activation on modified NiTi alloys, indicating strong potential for cardiovascular devices.
AIM: +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.
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Witkowska et al. (2017) studied this question.
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