(1. 中南大学 粉末冶金国家重点实验室， 长沙 410083 ；
2. Bioengineering Unit， Strathclyde University， Glasgow G4 0NW, UK)
摘 要: 研究了不同成分HA-Ti和HA-BG-Ti复合生物材料的烧结收缩率、 微观结构、 物相结构与力学性能之间的关系。 结果表明： 当钛含量达到45％～65％时， HA-Ti系复合材料的抗压强度达到最低值76MPa左右， 呈谷值分布，而HA-BG-Ti系复合材料的抗压强度却达到最大值180MPa左右， 呈峰值分布； HA-Ti系复合材料的抗弯强度为58~79MPa， 而HA-BG-Ti系复合材料的抗弯强度在钛含量为45％～65％时出现最大值164MPa； HA-BG-Ti系的抗压强度和抗弯强度均高于HA-Ti系的抗压强度和抗弯强度。物相分析和微观结构分析表明： HA-BG-Ti复合陶材料中的HA-Ti相间界面依靠生物玻璃以复杂的强键相结合， 是HA-BG-Ti系复合材料的力学性能优于HA-Ti二元系复合材料力学性能的原因。
关键字: HA-Ti生物材料； 烧结收缩率； 力学性能； 微观结构
HA-Ti and HA-BG-Ti composited biomaterials
（1. State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China；
2. Bioengineering Unit, Strathclyde University，
Glasgow G4 0NW， UK）
Abstract:Sintering shrinkage and strength as well as their relationships with microstructure of HA-Ti binary and HA-BG-Ti ternary biocomposites were studied. The results show that the compressive strengthes of HA-Ti binary and HA-BG-Ti ternary composites reach to the minimum of 76MPa and the maximum of 180MPa when Ti contents on the scale of 45% and 65% respectively. Comparing with the values between 58~79MPa of HA-Ti binary composites bending strength, HA-BG-Ti ternary composite’s bending strength reaches to its maximum of 164MPa when Ti contents equal to 45%~65% around. Brittle phase including calcium titanate and calcium carbonate and flaws impaire the combination between Ti and HA particles in HA-Ti binary. Otherwise, a complex strong binding force accompanied by elemental diffusion of Si and Ti in HA-BG-Ti ternary composites could theoritically explain the great difference of mechanical properties between HA-BG-Ti ternary composites and HA-Ti binary composites.
Key words: HA-Ti biomaterial; sintering shrinkage; mechanical property; microstructure
