采用无压烧结制备出不同Ti-Fe含量的HA/Ti-Fe生物复合材料,对其组织结构和力学性能进行了研究.显微组织的观察表明:均匀分布于HA基体中的金属Ti-Fe增强颗粒呈一种新颖的蛋壳状组织结构,其中核区主要由Fe组成,壳层主要由Ti组成.力学性能测试结果显示:随着Ti-Fe含量的增加,HA/Ti-Fe复合材料的硬度有所下降,但材料的抗弯强度和断裂韧度均明显提高.当Ti-Fe含量为5％时,抗弯强度出现最大值93MPa,与纯HA相比提高了42％;当Ti-Fe含量为15％时,材料的断裂韧度达到最大值1.3MPa·m1/2,较纯HA提高了128％.良好的界面结合和分布于壳层的韧性相Ti是导致材料力学性能大幅提高的主要原因.
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