Biaxial fatigue of sintered hydroxylapatite

T. Hussain, A. Gholinia, C. Leach

Research output: Contribution to journalArticlepeer-review


The mechanical properties of a commercial and a laboratory prepared hydroxylapatite (HAP) were compared. The biaxial flexure strength, fracture toughness and fatigue crack growth in dry and wet (saline) environments were measured Strength and fracture toughness values of around 50Mpa and 1MPa √m were measured in biaxial flexure. Average fatigue crack growth rates were calculated from the mean growth rate of the four crack tips and were found to be in the range 10-8 to 10-9m.cycle-1 at R=0.5 and Kmax in the range 0.2 to 0.3 MPa √m. Dry crack growth rates were found to be approximately six times slower than those measured under wet conditions for the same Kmax.

Original languageEnglish
Pages (from-to)544-547
Number of pages4
JournalKey Engineering Materials
Publication statusPublished - 1997


  • Biomedical materials
  • Ceramic
  • Fatigue
  • Stress


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