Affiliations: Department of Materials Science and Engineering, Teikyo University, Utsunomiya 320, Japan | Department of Mechatronics and Precision Engineering, Tohoku University, Sendai 980, Japan
Note: [] Permanent address: Department of Chemical Engineering, Åbo Akademi University, FI‐20500 Åbo, Finland.
Abstract: By using the fracture toughness estimation method based on two‐dimensional map, it was found that the ductility of the high porosity hydroxyapatite/mica 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.
