Zirconia-toughened hydroxyapatite ceramic obtained by wet sintering

J A Delgado; L Morejón; S Martínez; M P Ginebra; N Carlsson; E Fernández; J A Planell; M T Clavaguera-Mora; J Rodríguez-Viejo

doi:10.1023/a:1008923121172

Zirconia-toughened hydroxyapatite ceramic obtained by wet sintering

J Mater Sci Mater Med. 1999 Dec;10(12):715-9. doi: 10.1023/a:1008923121172.

Authors

J A Delgado¹, L Morejón, S Martínez, M P Ginebra, N Carlsson, E Fernández, J A Planell, M T Clavaguera-Mora, J Rodríguez-Viejo

Affiliation

¹ Centro de Biomateriales, Universidad de La Habana, 10400-Ciudad Habana, Cuba.

PMID: 15347939
DOI: 10.1023/a:1008923121172

Abstract

A toughened hydroxyapatite (HA) ceramic has been obtained through the incorporation of magnesia partially stabilized zirconia (Mg-PSZ) under uniaxial pressing and sintering in wet oxygen at 1250 degrees C for 4 h. The powder X-ray diffraction (XRD) patterns and infrared spectra (FT-IR) show that HA is the only calcium phosphate phase present. The composite (MgPSZ-HA) has a density of 94% the theoretical value. The bending strength and the fracture toughness are around 50% higher for Mg-PSZ reinforced than for HA. The grain size and the fracture surface were studied by scanning electron microscopy (SEM). The influence of the Mg-PSZ particles on the fracture mechanism of the HA ceramic is discussed.