采用溶胶-凝胶法在Ti6Al4V基体上制备了HAP/TiO2纳米复合涂层,并引入TiO2作为缓冲层.使用XRD、FT-IR和FE-SEM协同EDS研究了450、550和650℃温度下煅烧后涂层的组成和结构特征.实验结果表明,HAP/TiO2涂层均具有较好的结晶态,涂层厚度均匀、致密,与金属基体结合紧密.由亚微米级HAP晶体颗粒(100～200nm)镶嵌在分布均匀的纳米TiO2胶质之中,TiO2凝胶颗粒大小随煅烧温度的变化在10～30nm变动.力学测试结果表明这些复合涂层具有较高的结合强度,随着煅烧温度的升高,涂层的抗拉强度呈现上升的趋势.体外生物活性的测试证实了它们的生物活性.
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