Preparation and characterization of novel sol-gel derived hydroxyapatite/Fe^sub 3^O^sub 4^ composites coatings on Ti-6Al-4V for biomedical applications

In this study, for the first time we have developed the composite coatings using sol-gel derived hydroxyapatite [HAP: (Ca)10 (PO4)6 (OH)2] and magnetite (Fe3O4) on alkali treated Ti-6Al-4V alloy using various concentrations of Fe3O4 nanoparticles such as 1, 3 and 5 wt% respectively. The fabricated c...

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Bibliographic Details
Published in:Materials letters 2017-02, Vol.189, p.118
Main Authors: Anjaneyulu, U, Vijayalakshmi, U
Format: Article
Language:English
Subjects:
Alloys
Apatite
Biocompatibility
Biological activity
Biomedical materials
Calcium
Chemical compounds
Contact angle
Corrosion prevention
Corrosion resistance
Corrosion tests
Hydroxyapatite
Iron oxides
Leaching
Materials science
Nanoparticles
Protective coatings
Sol-gel processes
Surgical implants
Titanium base alloys
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Summary:In this study, for the first time we have developed the composite coatings using sol-gel derived hydroxyapatite [HAP: (Ca)10 (PO4)6 (OH)2] and magnetite (Fe3O4) on alkali treated Ti-6Al-4V alloy using various concentrations of Fe3O4 nanoparticles such as 1, 3 and 5 wt% respectively. The fabricated composite coatings were characterized by XRD, SEM-EDAX and contact angle measurements. In vitro bioactivity study confirmed that the composite coated Ti-6Al-4V was highly bioactive and induces bone like apatite formation in the presence of Fe3O4 NPs which involves the nucleus formation by developing Fe-OH groups on the surface of coatings. The corrosion resistance study proved that 1 wt% of Fe3O4 with HAP composite coatings exhibit good anticorrosion behaviour than the 3, 5 wt% of composites due to lower Fe-OH groups and uniform with adherent layer which restricts the leaching of ions. Hence, this finding suggested that HAP/Fe3O4 composites coated implants can be used for biomedical applications.
ISSN:0167-577X
1873-4979