Abstract:A layer of premixed CaHPO4·2H2O-CaCO3-Y2O3powders stuck on pretreated surface of Ti-6Al-4V alloy substrate was successfully transformed into a composite of rare earth bioceramic coating by laser synthesizing and cladding only once. The microstructure and properties of the coating material were introduced. The titanium alloy with bioceramic coating on one side were implanted into the femur bone and thigh muscles of adult Mongrel dogs for testing its biocompatibility. The results of implantation experiments show that the microstructure of the coating material is static, the bonding properties between coating and substrate are better. The bioceramic coating had not toxicity-side effectiveness on the body and there is a better compatibility of osteoconducton. No effect of the coating material on the bio-activity of osteoblast and osteoclast was found.

Key words: laser cladding; bioceramic coating; biocompatibility; rare earth