【摘要】 采用干粉叠层法和热压工艺制备HA/316L不锈钢对称功能梯度生物复合材料,使用三点弯曲法测定HA/316L不锈钢对称功能梯度生物复合材料试样的抗弯强度和弹性模量,并借助扫描电子显微镜对试样对表面形貌和微观结构进行观察和表征,利用场发射高分辨扫描电子显微镜对试样进行元素线扫描分析。研究结果表明:通过控制HA粉末的含量(体积分数)在20%~40%之间时,所得复合材料的抗弯强度和弹性模量分别与人体骨的强度和模量相匹配,得到生物力学相容性好的复合材料;HA/316L不锈钢复合材料各梯度层之间过渡自然,没有明显的宏观界面、缺陷和裂纹等,梯度层内部和界面处两相分布均匀,且各成分均呈现连续的梯度分布,界面结合紧密。更多还原

【Abstract】 HA/316L stainless steel (SS) symmetrical functionally gradient biocomposites (FGB) were prepared by cascading and hot-pressing technology. The bending strength and elastic modulus of the composites samples were determined by three-point bending method, and their surface morphologies and microstructure were observed using scanning electron microscopy (SEM), and the element analysis was characterized using field emission high discrimination scanning electron microscopy. The results show that, when the contents of HA range from 20% to 40%, the composites whose bending strength and elastic modulus match with those of human living bone, possess good biomechanics compatibility. Furthermore, there are no obvious macroscopical interface, defect and crack between each gradient layer. The phases and the components of the interior and interface of gradient layer distribute uniformly and continuously, respectively, and the interfaces combine closely.更多还原