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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/92529
- Sol-gel derived hydroxyapatite/titania biocoatings on titanium substrate
- Xu, Wei; Hu, Wangyu; Li, Meiheng; Wen, Cui'e
- 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
- Materials Letters, Vol. 60, no. 13-14 (Jun 2006), pp. 1575-1578
- Publication year
- FOR Code(s)
- 0910 Manufacturing Engineering; 0912 Materials Engineering
- Hydroxyapatite; Sol-gel preparation; Surfaces; Titania; Titanium
- Elsevier BV
- Publisher URL
- Copyright © 2005 Elsevier B.V.
- Peer reviewed