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Anjaneyulu, U.; Vijayalakshmi, U.
Materials letters, 02/2017, Letnik: 189Journal Article
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 5wt% 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 1wt% of Fe3O4 with HAP composite coatings exhibit good anticorrosion behaviour than the 3, 5wt% 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. Display omitted •First time, we have developed HAP-Fe3O4 coatings on Ti-6Al-4V by spin coating.•Petal to needle shaped morphology was observed with increase in Fe3O4 content.•Ball like apatite crystals were formed due to electrostatic interaction of Fe-OH.•Corrosion resistance was more for 1wt% of Fe3O4 due to less Fe-OH groups leaching.
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