The effect of thermal and mechanical treatment

on the microstructure of bioceramics prepared

by compaction of the hydroxyapatite powder

 

F. Abida, Z. Hatim*, A. Kheribech, M. Elassfouri, B. Elouatli, M. Jamil

Equipe Electrochimie et Biomatériaux, Faculté des Sciences.

Université Chouaib Doukkali. B.P. 20. El Jadida - Maroc -

* Corresponding author: E-mail: zineb.hatim@yahoo.fr

Received: 02 September 2012; revised version accepted: 12 October 2012


 

Abstract

     Bioceramics are prepared by using hydroxyapatite (Ca10(PO4)6(OH)2) crystals with small size and thermally stable composition. The precursor powder, prepared at 25°C from calcium hydroxide and phosphoric acid, is compacted at different pressing and thermally treated at different temperature for different time intervals. A very dense microstructure of ceramic (96 ± 2%) with a few small intragranular pores was obtained at a temperature lower than the optimal temperature of sintering hydroxyapatite. This microstructure results from the granular properties of the hydroxyapatite powder and from the various successive steps integrated into the manufacturing process of the parts.

 

Keywords: Bioceramic; Stoichiometric hydroxyapatite; Mechanical treatment; Thermal treatment.


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