以纳米TiO2粉末为喷涂原料,采用大气等离子体喷涂技术在医用钛合金上制备氧化钛涂层.利用酸和碱溶液对氧化钛涂层表面进行生物活化处理,体外模拟体液浸泡实验考察涂层的生物活性.采用XRD、SEM、FTIR、EDS等测试技术对改性前后氧化钛涂层的生物活性进行表征.结果表明:氧化钛涂层和钛合金基体的结合强度较高,其值高达40MPa,涂层的耐模拟体液腐蚀性优于钛合金.酸和碱溶液表面改性后的氧化钛涂层经模拟体液浸泡可在其表面生成含有碳酸根的羟基磷灰石(类骨磷灰石),显示良好的生物活性.
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