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Updated: May 9, 2026
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Rapid Formation and Testing of Self-expanding NiTi Frames with a Small Form Factor Suitable for Minimally Invasive Implants
Published on: March 7, 2025
Design of a nitrogen-implanted titanium-based superelastic alloy with optimized properties for biomedical
D M Gordin1, D Busardo, A Cimpean
1INSA de Rennes, Laboratoire Chimie-Métallurgie, UMR CNRS 6226 Institut des Sciences Chimiques de Rennes, 20 avenue des Buttes de Coësmes, 35708 Rennes Cedex 7, France.
Summary
Nitrogen ion implantation enhances a nickel-free titanium alloy for medical devices. This surface treatment improves mechanical properties, corrosion resistance, and cell compatibility, making it ideal for biomedical applications.
Area of Science:
- Biomedical Engineering
- Materials Science
- Surface Engineering
Background:
- Nickel-free titanium alloys are crucial for biomedical implants due to their superelasticity and biocompatibility.
- Surface modification techniques are essential to further enhance the performance of these alloys for demanding medical applications.
Purpose of the Study:
- To investigate the effects of nitrogen ion implantation on the surface properties and biocompatibility of a superelastic, nickel-free titanium-based alloy.
- To evaluate the potential of this novel surface treatment for advanced biomedical device applications.
Main Methods:
- Surface characterization using X-ray diffraction, X-ray photoelectron spectroscopy, and secondary ion mass spectroscopy.
- Evaluation of mechanical properties via nano-indentation and tribological tests.
- Assessment of corrosion resistance in simulated body fluids and in-vitro cytocompatibility testing with human fetal osteoblasts.
Main Results:
- Nitrogen ion implantation successfully formed a titanium-based nitride layer on the alloy surface.
- Significant improvements in surface hardness and a reduction in friction coefficient were observed.
- Enhanced corrosion resistance and reduced ion release rates were demonstrated.
- The nitrogen-implanted alloy exhibited superior cytocompatibility compared to the untreated alloy.
Conclusions:
- Nitrogen ion implantation is a promising surface treatment for superelastic, nickel-free titanium alloys.
- The modified alloy demonstrates optimized properties including superelasticity, enhanced mechanical characteristics, superior corrosion resistance, and excellent cytocompatibility.
- This functionalized alloy holds significant potential for use in various medical devices.
