Abstract
In order to improve the weak mechanical properties of bioceramic HA, composite coatings were prepared by adding the toughening zirconia to HA powder so as to improve the biological and the physical properties but not to reduce the biocompatibility of HA bioceramic coating. The pure HA coating and HA/ZrO2 composite coating containing 30% stabilized zirconia on titanium alloy by employing plasma spraying technology were prepared. The relation curves of load-displacement for the two coatings were obtained with three point bending experiment, and obtained the slope about the straight fitting line. Then the elastic modulus and fracture toughness of the both coatings were calculated. The fracture morphology of the two coatings after their failure was observed using electron microscope.
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