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Preparation of ceramic coatings on titanium formed by micro-arc oxidation method for biomedical application

M. M. DICU1,* , M. ABRUDEANU1, S. MOGA1, D. NEGREA1, V. ANDREI2, C. DUCU1

Affiliation

  1. University of Pitesti, Research Center for Advanced Materials, Targu din Vale, No 1, 110040, Pitesti, Romania
  2. DIMat-R, Renault Technologies Romania, Uzinei, No 1-3, 115400, Mioveni, Arges, Romania

Abstract

This paper presents a method to grow nano-structured TiO2 by micro-arc oxidation (MAO) on titanium surfaces. During the oxidation treatment, the titanium sample was immersed in electrolytic solution containing calcium acetate monohydrate (CH3COO)2Ca·H2O) and sodium phosphate monobasic dihydrate (NaH2PO4·2H2O). During the process of the simulated body fluid (SBF) immersion (3 day in SBF and 3 day in 5SBF), the Ca and P of the MAO coating dissolves into the SBF, increasing the supersaturation degree near the surface of the MAO coating, which could promote the formation and growth of apatite. The morphologies on the sample surfaces were observed by scanning electron microscopy (SEM). The oxide film composition was semi-quantitatively analyzed with an electron probe microanalyzer (EDX). X-Ray Diffraction (XRD) analysis was used to determine the phase composition of the coatings prepared by MAO at different treatment time. Fourier Transform Infrared Spectroscopy (FT-IR) was used to analyze the phase and structure of the MAO coatings after SBF immersion.The coatings were rough and porous, without apparent interface to the titanium substrates. All the oxidized coatings contained Ca and P as well as Ti and O, and the porous coatings were made up of anatase, rutile and hydroxyapatite.

Keywords

Micro-arc oxidation, Titanium, Coatings, Titania, Simulated body fluid, Biomaterials.

Submitted at: Oct. 27, 2011
Accepted at: Feb. 20, 2012

Citation

M. M. DICU, M. ABRUDEANU, S. MOGA, D. NEGREA, V. ANDREI, C. DUCU, Preparation of ceramic coatings on titanium formed by micro-arc oxidation method for biomedical application, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 1-2, pp. 125-130 (2012)