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Precipitation of hydroxyapatite on pure titanium substrate via single step anodic oxidation

Lee, Te Chuan and Rashid, M. H. A. and Selimin, Mohamad Ali and Abdullah, Hasan Zuhudi and Idris, Maizlinda Izwana (2015) Precipitation of hydroxyapatite on pure titanium substrate via single step anodic oxidation. In: 24th Scientific Conference of the Microscopy Society Malaysia (SCMSM 2015), 2-4 December 2015, Hotel Avillion, Melaka, Malaysia.

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Abstract

Anodic oxidation is an electrochemical method that deposits ceramic coatings on the metal substrates to improve the bioactivity of implant. In this study, a novel approach was proposed to precipitate hydroxyapatite (HAP) directly on the surface of pure titanium through anodic oxidation approach. As part of the proposed approach, a new formulation of electrolyte was introduced, which consists of 0.04 M β-glycerophosphate (β-GP), 0.4 M calcium acetate (CA) and 1.0 M sulphuric acid (H2SO4). The approach herein only requires a single step to precipitate the HAP directly on the surface of titanium through anodisation process within the electrolyte. High purity titanium foils were anodised in 0.04 M β-GP + 0.4 M CA + 1.0 M H2SO4 at 350 V and 70 mA.cm-2 for 10 minutes at varying fractions of mixture volumes of H2SO4 (0-100 vol %). The surface properties of anodised titanium were characterised by using several methods, namely the field emission scanning electron microscopy (FESEM), glancing angle X-ray diffractometer (GAXRD) and goniometer. The outcome of the characterisation showed that the needle-like HAP was precipitated on the titanium, whereby anodising in electrolyte contains 12.5 vol % H2SO4. Combinations of anatase, rutile, titanium, tricalcium phosphate (Ca3O8P2) and calcium diphosphate (Ca2O7P2) elements were detected within the anodised titanium, whereby the anodising in electrolyte contains 50 vol % H2SO4

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: hydroxyapatite; anodic oxidation; titanium
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Mrs. Nurhayati Ali
Date Deposited: 13 Aug 2018 03:41
Last Modified: 13 Aug 2018 03:41
URI: http://eprints.uthm.edu.my/id/eprint/7683
Statistic Details: View Download Statistic

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