(1. 中南大學 粉末冶金國家重點實驗室， 長沙 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復(fù)合生物材料的燒結(jié)收縮率、 微觀結(jié)構(gòu)、 物相結(jié)構(gòu)與力學性能之間的關(guān)系。 結(jié)果表明： 當鈦含量達到45％～65％時， HA-Ti系復(fù)合材料的抗壓強度達到最低值76MPa左右， 呈谷值分布，而HA-BG-Ti系復(fù)合材料的抗壓強度卻達到最大值180MPa左右， 呈峰值分布； HA-Ti系復(fù)合材料的抗彎強度為58~79MPa， 而HA-BG-Ti系復(fù)合材料的抗彎強度在鈦含量為45％～65％時出現(xiàn)最大值164MPa； HA-BG-Ti系的抗壓強度和抗彎強度均高于HA-Ti系的抗壓強度和抗彎強度。物相分析和微觀結(jié)構(gòu)分析表明： HA-BG-Ti復(fù)合陶材料中的HA-Ti相間界面依靠生物玻璃以復(fù)雜的強鍵相結(jié)合， 是HA-BG-Ti系復(fù)合材料的力學性能優(yōu)于HA-Ti二元系復(fù)合材料力學性能的原因。
關(guān)鍵字: HA-Ti生物材料； 燒結(jié)收縮率； 力學性能； 微觀結(jié)構(gòu)
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
