Mechanical Properties of HAp/TiO2 Nanocomposites Synthsised by In-Situ Precipitation at Low Temperature

Enayati-jazi, M.; Solati-Hashjin, M.; Nemati, A.; Aminian, A.; Farzadi, A.

Mechanical Properties of HAp/TiO2 Nanocomposites Synthsised by In-Situ Precipitation at Low Temperature

Authors

M. Enayati-jazi ¹

M. Solati-Hashjin ²

A. Nemati ¹

A. Aminian ²

A. Farzadi ²

¹ Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

² Departments of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

To improve mechanical properties of hydroxyapatite as the main mineral constituent of hard tissue, titania reinforcement was added to hydroxyapatite structure. HAp/TiO₂ nanocomposites were prepared successfully by in situ precipitation processes at room temperature and 70°C. Fallowing that, hydroxyapatite/titania bodies were fabricated by hot isostatic pressing at 1200°C under a pressure of 200 MPa. Characterization of mechanical behavior of compacts indicated that
mechanical properties of hydroxyapatite/titania samples are relatively higher in relation to pure hydroxyapatite. SEM images showed that the HAp/TiO₂ nanocomposites demonate excellent chemical and structural uniformity. TEM observation revealed that different morphology for hydroxyapatite/titania nanocomposites could be obtained due to titania crystalline structure. XRD and FTIR results indicated the formation of high temperature crystalline phase of titania (rutile) at room temperature and low temperature phase of its (anatase) at 70ºC.

Keywords

Hydroxyapatite

Titania

nanocomposites

in situ precipitation

mechanical properties