Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/92529

Title

Sol-gel derived hydroxyapatite/titania biocoatings on titanium substrate

Author(s)

Xu, Wei;  Hu, Wangyu;  Li, Meiheng;  Wen, Cui'e

Abstract

A simple sol-gel method was successfully developed for a hydroxyapatite (HA)/TiO2 double layer deposition on a pure titanium substrate. Phase formation, surface morphology, and interfacial microstructure were investigated by differential scanning calorimetry analysis (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The TiO2 layer was coated by a spin coating method at a speed of 1500 rpm for 15 s, followed by a heat treatment at 560 °C for 20 min. The HA film was subsequently spin coated on the outer surface at the same speed and then heat-treated at difference temperatures. Results indicated that the HA phase began to crystallize after a heat treatment at 580 °C; and the crystallinity increased obviously at a temperature of 780 °C. The HA film showed a porous structure and a thickness of 5–7 μm after the heat treatment at 780 °C. SEM observations revealed no delamination and crack at the interfaces of HA/TiO2 and TiO2/Ti. The HA film with a porous structure is expected to be more susceptible to the natural remodeling processes when it is implanted in a living body.

Publication type

Journal article

Source

Materials Letters, Vol. 60, no. 13-14 (Jun 2006), pp. 1575-1578

Publication year

2006

FOR Code(s)

0910 Manufacturing Engineering;  0912 Materials Engineering

Keyword(s)

Hydroxyapatite;  Sol-gel preparation;  Surfaces;  Titania;  Titanium

Publisher

Elsevier BV

ISSN

0167-577X

Publisher URL

http://dx.doi.org/10.1016/j.matlet.2005.11.072

Copyright

Copyright © 2005 Elsevier B.V.

Peer reviewed