G. Wang, X. liu, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, China; C. Ding, Chinese Academy of Sciences, Shanghai Institute of Ceramics, Shanghai, China
Calcium oxide stabilized zirconia coatings have been deposited onto Ti-6Al-4V substrates by means of atmospheric plasma spraying. The phase composition and microstructure of the powders and coatings were examined by scanning electron microscopy and X-ray diffraction. In vitro bioactivity appraisement of the coating was performed in simulated body fluid (SBF) with ion concentrations nearly equal to those of human blood plasma. Apatite can be detected on the coating surface after immersion in SBF. This result together with previous work indicated that calcium oxide stabilized zirconia was not only a biocompatible but also a bioactive material. Higher bonding strength and better mechanical properties were also obtained compared with plasma sprayed hydroxyapatite coatings. All results show that calcium oxide stabilized zirconia is a potential candidate for artificial joint coating material.Key words: calcium oxide stabilized zirconia, plasma spraying, apatite, stimulated body fluid
Summary: Calcium oxide stabilized zirconia coatings have been deposited onto Ti-6Al-4V substrates by means of atmospheric plasma spraying. The phase composition and microstructure of the powders and coatings were examined by scanning electron microscopy and X-ray diffraction. In vitro bioactivity appraisement of the coating was performed in simulated body fluid (SBF) with ion concentrations nearly equal to those of human blood plasma. Apatite can be detected on the coating surface after immersion in SBF. This result together with previous work indicated that calcium oxide stabilized zirconia was not only a biocompatible but also a bioactive material. Higher bonding strength and better mechanical properties were also obtained compared with plasma sprayed hydroxyapatite coatings. All results show that calcium oxide stabilized zirconia is a potential candidate for artificial joint coating material.
