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Sol-gel Derived Biphasic Calcium Phosphate Ceramics on Nitinol for Medical Applications

Nitinol is an attractive material for various types of medical implants due to its superior mechanical and unique properties (shape memory effect, superelasticity, high damping capacity etc). The Nitinol surface was modified with biocompatible coatings of calcium phosphate prepared by the sol-gel dip-coating method. The surface morphology, structure, and chemical composition of coatings were investigated by field emission scanning electron microscopy (FE – SEM)/energy dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR). The barrier properties were investigated in vitro in simulated physiological solution using electrochemical impedance spectroscopy (EIS). It has been shown that the cycling dip-coating- calcining procedure produces homogeneous films with excellent barrier properties.

materials science; Nitinol; biphasic calcium phosphate; sol-gel method; biocompatibility; spectroscopic methods

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