Effect of double thermal and electrochemical oxidation on titanium alloys for medical applications

Agnieszka Ossowska , Jean-Marc Olive (1) , Andrzej Zieliński , Andrzej Wojtowicz

1 I2M - Institut de Mécanique et d'Ingénierie

The research focuses on the development and characterization of innovative thin hybrid oxide coatings obtained in subsequent processes of thermal (TO) and electrochemical (EO) oxidation. Four different surface modifications were investigated and the microstructure was determined, the mechanical, chemical and biological properties of the Ti-13Nb-13Zr alloy were assessed using scanning electron microscopy, X-ray dispersion analysis, glow discharge emission spectroscopy, Raman spectroscopy, nanoindentation and corrosion resistance measurements. The composite layers were evaluated for antimicrobial activity, cytotoxicity bioassays and wettability tests were performed. The conducted studies of two-stage oxidation (TO + EO) have shown that it is possible to obtain layers with a different structure - crystalline and nanotubular. The formation of a nanotube layer on the surface of the crystalline layer is dependent on the thickness of the crystalline layer. The produced double titanium oxide coatings show high surface roughness, high corrosion resistance, are hydrophilic, slightly antibacterial, and not cytotoxic, which has a huge impact on the process of connecting the tissue with the implant.

Mots clés: Titanium alloys; Thermal oxidation; Electrochemical oxidation; Coatings; Microstructure; Nanoindentation; Cytotoxicity; Antibacterial efficiency

Domaines: Matériaux

Agnieszka Ossowska, Jean-Marc Olive, Andrzej Zieliński, Andrzej Wojtowicz. Effect of double thermal and electrochemical oxidation on titanium alloys for medical applications. Applied Surface Science, 2021, 563, pp.150340. ⟨10.1016/j.apsusc.2021.150340⟩. ⟨hal-03483349⟩