Fracture toughness of hydroxyapatite/mica composite, packed hydroxyapatite, alumina ceramics, silicon nitride and -carbide

Biomed Mater Eng. 1998;8(1):37-43.

Abstract

By using the fracture toughness estimation method based on two-dimensional map, it was found that the ductility of the high porosity hydroxyapatite/mice composite was comparable with silicon carbide. It was measured to be higher than that of packed hydroxyapatite. Alumina ceramics with more than 96% aluminium oxide showed a higher fracture toughness than the composite material. When bending strength was compared, the strength of the composite was two or three times lower than that of packed hydroxyapatite and much lower than the other studied materials. The composite material showed high porosity, which in turn gives it a lower bending strength. However, the high porosity is more favourable for biocompatibility.

Publication types

  • Comparative Study

MeSH terms

  • Aluminum / chemistry*
  • Aluminum Silicates / chemistry*
  • Biocompatible Materials / chemistry*
  • Carbon Compounds, Inorganic / chemistry*
  • Durapatite / chemistry*
  • Hardness Tests
  • Materials Testing
  • Metal Ceramic Alloys / chemistry*
  • Microscopy, Electron, Scanning
  • Porosity
  • Silicon Compounds / chemistry*
  • Tensile Strength

Substances

  • Aluminum Silicates
  • Biocompatible Materials
  • Carbon Compounds, Inorganic
  • Metal Ceramic Alloys
  • Silicon Compounds
  • Durapatite
  • Aluminum
  • silicon nitride
  • mica
  • silicon carbide