Materials Science & Technology

FULLTEXT SEARCH
NEW: Advanced Search

Bioactivity of Plasma-Sprayed TiO2 Coating in Simulated Body Fluid by Hydrofluoric Acid Treatment

Journal Materials Science Forum (Volumes 510 - 511)
Volume Eco-Materials Processing & Design VII
Edited by Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee
Pages 13-16
DOI 10.4028/www.scientific.net/MSF.510-511.13
Citation Xiao Bing Zhao et al., 2006, Materials Science Forum, 510-511, 13
Online since March, 2006
Authors Xiao Bing Zhao, Xuan Yong Liu, Chuan Xian Ding
Keywords Bioactivity, Hydrofluoric Acid (HF), Plasma Spraying, Simulated Body Fluid (SBF), TiO2 Coating
Abstract

TiO2 coatings on titanium alloy substrates were prepared by atmospheric plasma spraying using commercial nano-powders. Then, as-sprayed coatings were treated using 10% hydrofluoric acid (HF) at room temperature for 30 seconds. As-sprayed and HF-treated titania coatings were soaked in simulated body fluid to investigate the formation of apatite on their surface. Field-emission scanning electron microscopy was used to observe the surface morphologies, and the phase composition of the as-sprayed coating and apatite were analyzed by X-ray diffraction and energy-dispersive X-ray spectrometry. As-sprayed titania coating is composed of rutile, anatase, and a small quantity of Ti3O5. It exhibited excellent adhesion between the TiO2 coatings and titanium alloy substrates, and the bonding strength was about 38 MPa. After in vitro experiment, a new substance containing calcium and phosphate was formed on the surface of HF-treated TiO2 coatings after being soaked in SBF, while the new substance was not formed on the surface of as-sprayed TiO2 coatings. The results indicated that the bioactivity can be induced to the surface of plasma sprayed TiO2 coatings by hydrofluoric acid treatment.

Full Paper PDF Get the full paper by clicking here

First page example

Preview of first page