Mechanical properties of hydroxyapatite/fluorophlogopite bioglass-ceramics prepared by powder metallurgy

Hydroxyapatite/mica biomedical glass-ceramics were prepared by powder metallurgy. The effects of sintering temperature and composition on bending strength, fracture toughness and hardness were studied through mechanical properties test, microstructure observation and phase constitution analyses. The results show that with sintering temperature increasing, the density increases and the mechanical properties are improved. For the glass-ceramics with 80% mica, the bending strength increases from 55.1 MPa after sintered at 1000C to 120.1 MPa after being sintered at 1100C. With the increase of mica content, the bending strength, elastic modulus and fracture toughness increase. The effects of composition on mechanical properties are attributed to its effects on density, phase constitution and crystallinity.