HA-BG-Ti复合生物材料研究  

Research on HA-BG-Ti biocomposites

作　　者：邹俭鹏[1] 阮建明[1] 黄伯云[1] 刘建本[1] 赵志刚[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《粉末冶金材料科学与工程》2003年第1期7-14,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金(50174059)

摘　　要：研究了不同成分的二元系HA-Ti和三元系HA-BG-Ti复合生物材料的烧结收缩率、抗压强度、抗弯强度、微观结构、物相结构及化学成分等。结果表明:二元系HA-Ti复合材料烧结收缩率变化曲线一直呈下降趋势,从11.2％降至3.3％;三元系的烧结收缩率变化曲线呈“S”形,先降低后升高再降低(23.1％→16.2％→21.8％→17.1％),且HA-BG-Ti三元系复合材料的烧结收缩率普遍高于HA-Ti二元系的烧结收缩率。当钛含量达到50％～60％时,HA-Ti系复合材料的抗压强度达到最小值68 MPa,而HA-BG-Ti系复合材料的抗压强度却达到最大值131MPa;二元系复合材料的抗弯强度停滞在40 MPa左右,而三元系复合材料的抗弯强度曲线在钛含量为70％～75％时出现最大值64 MPa;总体上,三元系的抗压强度和抗弯强度均高于二元系的抗压强度和抗弯强度。由于HA-BG-Ti复合材料中的HA-Ti相界面依托生物玻璃以复杂的强键相结合,HA-Ti系复合材料的HA-Ti相界面存在CaTiO_3等脆性相,因而从理论上解释了HA-BG-Ti三元系复合材料的力学性能好于HA-Ti二元系复合材料的力学性能的原因。Sintering shrinkage, compressive strength, bending strength, chemical composition and their relationships with microstructure of HA-Ti binary and HA-BG-Ti ternary biocomposites were studied in this paper. The results show that both sintering shrinkage of HA-Ti and HA-BG-Ti composites are always descending from 11.2% to 3.3% and changing just like S shape (23.1%→16.2%→21.8%→17.1%) respectively with Ti contents increased, and sintering shrinkage of HA-BG-Ti ternary composites is higher than that of HA-Ti binary composites. The approach also indicates that Compressive strength of HA-Ti binary and HA-BG-Ti ternary composites reach to minimum of 68 MPa and maximum of 131 MPa when Ti contents equal 50% and 60% respectively. Compared with the fixed value of 40 MPa of HA-Ti binary composites, bending strength of HA-BG-Ti ternary composites reaches its maximum of 64 MPa when Ti contents equal 70% approximately. In general, compressive strength and bending strength of HA-BG-Ti ternary composites are higher than those of HA-Ti binary composites. Brittle phase including calcium titanate and calcium carbonate in HA-Ti binary composites and complex strong binding force accompanied by elemental diffusion of Si and Ti in HA-BG-Ti ternary composites theoretically explain the great difference of mechanical properties of HA-BG-Ti ternary composites and HA-Ti binary composites.

关 键 词：HA-Ti HA-BG-Ti 生物玻璃 强化 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]