C. Ding, Chinese Academy of Sciences, Shanghai Institute of Ceramics, Shanghai, China
In this paper, experiments performed at Shanghai Institute of Ceramics, Chinese Academy of Sciences pertaining to plasma sprayed new ceramic coatings are reviewed. Biocoatings consisted of calcium-silicon, calcium-phosphorus and bioactive titania were produced. The simulated body fluid immersion and cell culture tests indicated that these coatings exhibited excellent biocompatibility and bioactivity. Hydroxyapatite and titanium coatings deposited by vacuum plasma spray are mass produced for load-bearing hip. Nanostructured zriconia and alumina-titania coatings were deposited. Their microstructure and properties were examined. Nanostructured ZrO2 coatings possess lower thermal diffusivity and high thermal expansion, which are suitable for thermal protection. In addition, nanostructured ZrO2 and Al2O3-TiO2 showed good wear resistance which could be mainly ascribed to the decrease of micrometer defects such as pores and interlamellar cracks in the coatings. Silicon coating and antibacterial oxide coatings were also prepared. Efforts are proceeding for these coatings and some interesting results were obtained.
Summary: In this paper, experiments performed at Shanghai Institute of Ceramics, Chinese Academy of Sciences pertaining to plasma sprayed new ceramic coatings are reviewed. Biocoatings consisted of calcium-silicon, calcium-phosphorus and bioactive titania were produced. The simulated body fluid immersion and cell culture tests indicated that these coatings exhibited excellent biocompatibility and bioactivity. Hydroxyapatite and titanium coatings deposited by vacuum plasma spray are mass produced for load-bearing hip. Nanostructured zriconia and alumina-titania coatings were deposited. Their microstructure and properties were examined. Nanostructured ZrO2 coatings possess lower thermal diffusivity and high thermal expansion, which are suitable for thermal protection. In addition, nanostructured ZrO2 and Al2O3-TiO2 showed good wear resistance which could be mainly ascribed to the decrease of micrometer defects such as pores and interlamellar cracks in the coatings. Silicon coating and antibacterial oxide coatings were also prepared. Efforts are proceeding for these coatings and some interesting results were obtained.
