Paper Title:
Densification of Zirconia–Hydroxyapatite Ceramics Without Phase Changes
  Abstract

Zirconia-hydroxyapatite (40-60 vol%) composites were sintered at different temperatures in air. The x-ray diffraction patterns of the sintered composites showed that hydroxyapatite began to decompose to tricalcium phosphate even below 950°C. The decomposition of hydroxyapatite also involved release of structural water, which was studied using thermogravimetric analysis. By reducing the loss of structural water from the hydroxyapatite, the phase stability of the hydroxyapatite could be increased. This allowed higher temperatures to be used during the densification process where dense composites without any detectable reactions where produced by hot isostatic pressing at 1200°C as well as with spark plasma sintering at 1100°C.

  Info
Periodical
Key Engineering Materials (Volumes 309-311)
Main Theme
Edited by
Takashi Nakamura, Kimihiro Yamashita and Masashi Neo
Pages
1141-1144
DOI
10.4028/www.scientific.net/KEM.309-311.1141
Citation
E. Adolfsson, Z. Shen, "Densification of Zirconia–Hydroxyapatite Ceramics Without Phase Changes ", Key Engineering Materials, Vols. 309-311, pp. 1141-1144, 2006
Online since
May 2006
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Price
$32.00
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