摘要
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11.1mA,沉积时间为400s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1.1mA,沉积时间为900s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°C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。
A gradient hydroxyapatite/zirconia （HA/ZrO2） composite coating used in medicine was prepared by constant current deposition in ZrO（NO3）2 electrolyte and a mixed solution of Ca（NO3）2 and NH4H2PO4, successively. The influence of deposition current and deposition time on coating morphology was studied by scanning electron microscopy. Results indicated that an uniform Zr（OH）4 coating was obtained on titanium substrate in a Zr-containing electrolyte at 11.1 mA for 400 s, and a uniform and compact Zr（OH）4/HA composite coating was obtained on the titanium substrate with Zr（OH）4 coating from a Ca-containing phosphate electrolyte at 1.1 mA for 900 s. The composite coating can be converted to gradient HA/ZrO2 composite coating after heat treatment at 650 ℃. The result of tensile test proved that the adhesion strength of the HA/ZrO2 composite coating is increased from 5 MPa of a single HA coating to more than 17 MPa.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2011年第1期78-82,共5页
Electroplating & Finishing
基金
国家"973"计划资助(2007CB936103)
关键词
电化学沉积
羟基磷灰石
二氧化锆
复合涂层
钛基
生物相容性
electrochemical deposition
hydroxyapatite
zirconia
composite coating
titanium substrate
biocompatibility
作者简介
黄勇（1982-），男，河北张家口人，在读硕士研究生，主要从事医用钛表面生物活化研究。
通讯作者：庞小峰，教授，博导，（E—mail）pangxf2010@yahoo．com．cn。
