用恒电流沉积方法分别在ZrO(NO3)2电解液和由Ca(NO3)2及NH4H2PO4组成的电解液中制备出羟基磷灰石/二氧化锆(HA/ZrO2)梯度医用复合涂层.通过扫描电镜观察,研究了沉积电流和沉积时间对涂层形貌的影响.结果表明,当沉积电流为11.1 mA,沉积时间为400 s时,在锆电解液中可获得均匀的钛基Zr(OH)4涂层;当沉积电流为1.1 mA,沉积时间为900 s时,含Zr(OH)4涂层的钛基在钙的磷酸盐电解液中得到了均匀致密的Zr(OH)4/HA复合涂层.该复合涂层经650℃热处理后形成HA/ZrO2梯度复合涂层.拉伸试验表明,HA/ZrO2复合涂层的结合强度从单一HA涂层的5MPa增加到17MPa以上.
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