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Effect of ZrF4on hot-pressed hydroxyapatite/monoclinic zirconia composites

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
56
Issue
1
Identifiers
DOI: 10.1016/j.scriptamat.2006.08.058
Keywords
  • Hydroxyapatite
  • Sintering
  • Hardness Test
  • X-Ray Diffraction
  • Precipitation

Abstract

Composites of 25 wt.% monoclinic zirconia and 75 wt.% hydroxyapatite (HA) (with and without 5 wt.% ZrF 4) were hot pressed to investigate their mechanical properties and phase stability. HA decomposed to tricalcium phosphate when there was no ZrF 4 present. Addition of ZrF 4 into the composite improved its thermal stability and mechanical properties. Substitution of OH − by F − ions was verified by the change in HA’s hexagonal lattice parameters. A fracture toughness of 2.1 MPa √m and microhardness of 6.9 GPa were calculated for the composite containing ZrF 4.

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