Ray W.Y. Poon, Joan P.Y. Ho
Nickel–titanium shape memory alloys are useful orthopedic biomaterials due to their super-elastic and shape memory properties; however, the out-diffusion of harmful nickel ions during prolonged use in the human body raises critical safety concerns. This study aims to compare the anti-corrosion efficacy of oxide films produced through atmospheric-pressure oxidation and oxygen plasma ion implantation as barrier layers to prevent nickel leaching from NiTi substrates to biological tissues and fluids. A systematic evaluation was conducted using corrosion tests on various samples. Results indicated that oxidized samples did not show improved corrosion resistance and, in some cases, performed worse than untreated samples. Conversely, surfaces treated with plasma implantation displayed significantly enhanced corrosion resistance compared to both oxidized and untreated samples. Additionally, the study found that post-implantation annealing further increased the anti-corrosion capabilities of the samples. These findings suggest that oxygen plasma ion implantation could provide a viable solution for improving the biocompatibility and safety of NiTi alloys used in orthopedic applications.
@article{e46759e1-9c6c-4119-8ac0-0d2c665af23f,
title={Anti-corrosion performance of oxidized and oxygen plasma-implanted NiTi alloys},
author={Ray W.Y. Poon and Joan P.Y. Ho},
year={2005},
language={en}
}TY - JOUR TI - Anti-corrosion performance of oxidized and oxygen plasma-implanted NiTi alloys AU - Ray W.Y. Poon AU - Joan P.Y. Ho PY - 2005 LA - en ER -
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