Investigation on Mechanical Properties and Microstructure of Hydroxyapatite-SiC_w Composite Bioceramics

摘要

Hydroxyapatite-SiC_w composite micropowder was synthesized using in-situ composite method, and hydroxyapatite-SiC_w composite bioceramics with different content of SiC_w were produced by hot pressing sintering method. The microstructures of the materials were analyzed by SEM, and the relative density, bending strength and fracture toughness of the materials were tested. The results show that the mechanical properties of composite material are best when the whisker content is 20-23.7%. The mechanical properties of the material are the best when the tensile stress acted on the composite material is parallel with the hot pressing plane, and they are the worst when the tensile stress acted on the composite material is normal to the hot pressing plane.