Study of the Microstructural and Mechanical Properties of a Phosphocalcic Bone Substitute

Type : Article de conférence
Auteur(s) :  L. Alimi, L. Bahloul, A. Azzi, S. Guerf, F. Ismail
Année :  2018
Domaine : Sciences des matériaux
Conférence: Technologies and Materials for Renewable Energy, Environment and Sustainability (TMREES)
Lieu de la conférence:  Beirut, Lebanon
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  Phosphocalcic ceramic, hydroxyapatite, Wet precipitation, hardness, Thoughness, Crytallinity

Résumé : 

The choice of calcium phosphate materials in reconstructive surgery is justified by the surprising similarities between the composition of these materials and that of the bone. Among a multitude of bone substitutes, hydroxyapatite of chemical composition Ca10(PO4)6(OH)2 is the material most similar to natural apatites. In this study, hydroxyapatite was developed using the wet precipitation method from hydrated calcium chloride (CaCl2,12H2O) as a source of calcium and di-sodium hydrogen phosphate dihydrate (HNa2PO4,2H2O) as a source of phosphate. Vickers Microhardness tests and XRD analyzes were used for the characterization of the synthesized material. The mechanical properties namely HV, σe, and σr, KIC and microstructural like cristallite size Dhkl and degree of cristallinity Xc were discussed according to the temperatures of the heat treatments. Two temperatures were chosen 900 and 1200°C. From the results obtained, it is obvious that the variation of the different properties studied correlates with the temperature of the heat treatment.