采用干铺-烧结法制备了一种以二氧化锆(ZrO2)为基体梯度复合羟基磷灰石(HAP)的新型生物复合材料,并对其力学性能、微观结构和生物相容性进行了研究.用扫描电镜(SEM)、X射线衍射仪(XRD)、透射电镜(TEM)和EDAX能谱仪对粉体和复合材料进行分析.用复合材料的浸提液进行小鼠急性毒性试验、细胞毒性试验、体外溶血试验以及兔肌肉和骨内材料植入试验,评价复合材料的生物相容性.研究结果表明,复合材料的表面涂层厚度约80μm,芯部基体组织与表面均匀过渡结合,结合良好,没有明显界面,涂层结合强度为15.1 MPa,最大弯曲强度为1112.24 MPa,KIC为7.3～11.4 MPa·m1/2.其组织相容性好,具有良好的骨传导作用,促进骨组织生长,是一种较理想的新型骨科植入材料.
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