| The biocomposites of titanium and HA have been developed for the hard tissue implant for their superior bioactivity and mechanical properties. The composites are thought to be the most promising substitute of hard tissue, so many efforts have been made to develop new processing techniques, in order to improve their properties and so on. In this paper we combined the HA's fine bioactivity and Ti's excellent mechanical properties and synthesized the biocomposites by Spark Plasma Sintering(SPS). Additionally a few amount of Y2O3 were added into the composites.The study shows that: the temperature of getting HA ceramic by SPS is 900-950℃, which is lower than the temperature by other means. And the parameters of SPS in this paper are: the synthesized temperature=9001000 ℃ , calefactive time=15min, calefactive rate in first 5 minutes=100℃/min, keeping temperature time=30min, pressure=40MPa. In this technical condition, the composites were prepared well and not founded lingering cracks. The composites' configuration is different while the Ti contents were changed. The Ti-40wt%HA composites synthesized by SPS in 950 °C have excellent compressive strength and rigidity. The HA was found when the synthesized temperature of Ti-80wt%HA reached 1000℃. Sintered Ti substrate comprises an encircled and connected net in which HA is homogenously dispersed. This biocomposites have not only bearing high loads properties, but also excellent bioactivity. The Y2O3 is able to improve the material's mechanical activity and enhance the rigidity.
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