ABSTRACT

In order to fabricate cheaper porous hydroxyapatite we worked on the opportunity to use Algerian phosphate and aluminum metal powder. Hydroxyapatite (Hap) is a bioceramics due to its similar composition to bone substitutes because of its excellent bioactive properties which  was used on widely applied [1] espicially a  very well-known  in the medical field [2]  However, the low mechanical properties of this material have been the major problem of the extensive use of this bioceramics. Aluminum metal powder was used to obtain reinforced hydroxyapatite composites materials with alumina. The alumina phases resulting from the oxidation of aluminum powder at high temperature. The powder mixtures were performed in a Fritsch planetary ball-mill (pulverisette 6). The reactions and phase transformations between hydroxyapatite and aluminum powder were studied using thermal techniques (DTA/TG), X-ray diffraction (XRD) and infrared spectroscopy (FT-IR). All samples were heated at different temperatures and characterized by apparent density, open porosity measurements, XRD and SEM analysis. The results showed the formation of different phases at room temperature. The mixture powder milled showed the formation of different phases during heat treatment. Porosity was shown to be increased with temperature increasing and controlled by the reaction between phosphate and aluminum metal powder.

Key-words: Hydroxyapatite; Bioceramics, Aluminium powder, thermal.