Hydroxyapatite-TiO2-SiO2-Coated 316L Stainless Steel for Biomedical Application

Djahida Sidane (1) , Hafit Khireddine (1) , Fatima Bir (1) , Sabeha Yala (1) , Alex Montagne (2) , Didier Chicot (3)

1 UB - Université Abderrahmane Mira [Université de Béjaïa] = University Abderrahmane Mira [University of Béjaïa]
2 MSMP - Mechanics surfaces and materials processing
3 LML - Laboratoire de Mécanique de Lille - FRE 3723

This study investigated the effectiveness of titania (TiO2) as a reinforcing phase in the hydroxyapatite (HAP) coating and silica (SiO2) single-layer as a bond coat between the TiO2-reinforced hydroxyapatite (TiO2/HAP) top layer and 316L stainless steel (316L SS) substrate on the corrosion resistance and mechanical properties of the underlying 316L SS metallic implant. Single-layer of SiO2 film was first deposited on 316L SS substrate and studied separately. Water contact angle measurements, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectrophotometer analysis were used to evaluate the hydroxyl group reactivity at the SiO2 outer surface. The microstructural and morphological results showed that the reinforcement of HAP coating with TiO2 and SiO2 reduced the crystallite size and the roughness surface. Indeed, the deposition of 50 vol. % TiO2-reinforced hydroxyapatite layer enhanced the hardness and the elastic modulus of the HAP coating, the introduction of SiO2 inner-layer on the surface of the 316L SS allowed the improvement of the bonding strength and the corrosion resistance as confirmed by scratch studies, nanoindentation and cyclic voltammetry tests.

Mots clés: Corrosion behaviour; Mechanical properties; Biomedical; 316L stainless steel; Composite coating

Domaines: Matériaux; Biomatériaux

Djahida Sidane, Hafit Khireddine, Fatima Bir, Sabeha Yala, Alex Montagne, et al.. Hydroxyapatite-TiO2-SiO2-Coated 316L Stainless Steel for Biomedical Application. Metallurgical and Materials Transactions A, 2017, 48 (7), pp.3570-3582. ⟨10.1007/s11661-017-4108-8⟩. ⟨hal-01565674⟩