title: Preparation and characterization of Al2O3 reinforced hydroxyapatite.
abstract: The microstructure of Al2O3 reinforced hydroxyapatite (HA-Ca5(PO4)3OH) was studied. It was demonstrated that in this composite the Al2O3 particles are uniformly distributed in a matrix of spherical HA agglomerates formed by primary needlelike HA particles present before making green compact. In the HA + 20 wt% Al2O3 system, hydroxyapatite is partially decomposed into alpha-Ca3(PO4)2 and CaO with H2O vapour during sintering. Subsequently, the CaO is combined with Al2O3 to produce calcium aluminates (CaAl2O4 and CaAl4O7).
authors.affiliation: School of Metallurgy and Materials, University of Birmingham, UK.
authors.forename: H
authors.initials: H
authors.lastname: Ji
authors.forename: P M
authors.initials: PM
authors.lastname: Marquis
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D006882:Hydroxyapatites / Q000737:chemistry*; D008854:Microscopy, Electron; D014961:X-Ray Diffraction
chemical_list: D006882:Hydroxyapatites; D000537:Aluminum Oxide