Influence of TiO2 on the Microstructure, Mechanical Properties and Corrosion Resistance of Hydroxyapatite HaP + TiO2 Nanocomposites Deposited Using Spray Pyrolysis
Source abstract
Abstract
Titanium oxides and their alloys are widely used in medical applications because of their biocompatibility. However, they are characterized by their low resistance to corrosion. The HaP + TiO2 nanocomposites’ coating was applied in different experiments, especially on a Ti-6Al-4V substrate with the spray pyrolysis process to deal with such weakness. The TiO2 content effects on the surface morphology and the phase composition were investigated using a scanning electron microscopy, X-ray microanalysis (SEM-EDXS) and X-ray diffraction (XRD). The mechanical properties were determined with nanoindentation. The potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and simulated body fluid (SBF) solution environment tests were carried out to investigate the corrosion resistance of HaP + TiO2/Ti6Al4V systems. The experimental findings revealed that sprayed thin films possessed uniform morphology. The coatings’ nanoindentations proved that the HaP + 20% TiO2 coating hardness (252.77 MPa) and the elastic modulus (52.48 GPa) overtopped those of the pure hydroxyapatite coatings. The corrosion test demonstrated that the corrosion current density of about 36.1 µA cm−2 and the corrosion potential of the order of −392.7 mV of HaP + 20% TiO2 was lower compared to the pure HaP coating.
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Research context
OpenAlex topics: Bone Tissue Engineering Materials · Metal and Thin Film Mechanics · Titanium Alloys Microstructure and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratoire de Mécanique, Matériaux et Procédés LR99ES05, Ecole Nationale Supérieure d’Ingénieurs de Tunis, Université de Tunis, Tunis 1008, Tunisia
Institut Supérieur des Sciences Appliquées et de Technologie de Kasserine, Université de Kairouan, Tunis 3100, Tunisia
Laboratoire de Physico-Chimie de l’Atmosphere, Université du Littoral Cȏte d’Opale, 59140 Dunkerque, France
Laboratoire Mécanique, Productique et Énergétique (LMPE), Ecole Nationale Supérieure d’Ingénieurs de Tunis, Université de Tunis, B.P. 56, Bab Menara, Tunis 1008, Tunisia
Laboratoire Nanomatériaux, Nanotechnologie et Énergie (L2NE), Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis 2092, Tunisia
Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l’Energie, Technopole de Borj-Cédria, BP 95, Hammam-Lif 2050, Tunisia
Department de Physique, Unité de Physique des Dispositifs à Semi-Conducteurs, Faculté des Sciences de Tunis, Tunis El Manar University, Tunis 2092, Tunisia
Institut de Thermique, Mécanique et Matériaux (ITheMM), Université de Reims Champagne-Ardenne (URCA), 51100 Reims, France
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