Microstructure and mechanical properties of hydroxyapatite ceramics with zirconia dispersion prepared by post-sintering

Koji Ioku, Masahiro Yoshimura, Shigeyuki Somiya

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Abstract

Hydroxyapatite ceramics with zirconia dispersion from fine powders synthesized hydrothermally were post-sintered at 1000-1300°C under 200 M Pa of argon for 1 h without capsules, after normal sintering in air at 1200°C for 3 h. Densification was most significant with post-sintering at 1200°C. Fracture toughness, Vickers hardness and elastic properties of these materials were investigated. Post-sintering gave twice the K1c value of transparent pure hydroxyapatite ceramics. Vickers hardness and Young's modulus of the ceramics were increased by post-sintering.

Original languageEnglish
Pages (from-to)57-61
Number of pages5
JournalBiomaterials
Volume11
Issue number1
DOIs
Publication statusPublished - 1990
Externally publishedYes

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Keywords

  • Hydroxyapatite
  • mechanical properties
  • zirconia

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering

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