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 inMaterials letters Vol. 189; p. 118
Main Authors Anjaneyulu, U, Vijayalakshmi, U
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier BV 15.02.2017
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