摘要
为了扩大镁合金在生物植入物方面的应用,使用电泳沉积技术(EPD)在ZK60镁合金表面制备羟基磷灰石(HA)-还原氧化石墨烯(RGO)-氧化锌(ZnO)三元复合涂层,探究不同电泳沉积工艺对涂层质量以及耐腐蚀性能的影响。利用X射线衍射(XRD)、傅里叶红外光谱(FTIR)和拉曼光谱对样品进行了物相分析,采用扫描电子显微镜(SEM)观察涂层表面和截面形貌,通过极化曲线和交流阻抗等方法研究了裸镁合金和带涂层镁合金在模拟体液(SBF)中的腐蚀行为。结果表明,在180 V高压下沉积2 min,然后在120 V低压沉积3 min,获得的HA-RGO-ZnO180涂层较为均匀致密,对镁合金基体的保护效果最好。
In order to expand the application of magnesium alloy in biological implants,hydroxyapatite(HA)⁃reduced graphene oxide(RGO)⁃zinc oxide(ZnO)terpolymer coating was prepared on the surface of ZK60 magnesium alloy by electrophoretic deposition technology.The effects of different electrophoretic deposition(EPD)on coating quality and corrosion resistance were investigated.The samples were analyzed by X⁃ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),and Raman spectroscopy for phase analysis.The surface and cross⁃sectional morphology of the coating were observed by scanning electron microscopy(SEM).The corrosion behavior of bare magnesium alloy and coated magnesium alloy in simulated body fluid(SBF)was studied by polarization curves and alternating current impedance methods.The results showed that the HA⁃RGO⁃ZnO180 coating obtained by depositing at 180 V for 2 min and then at 120 V for 3 min is more uniform and dense,and have the best protective effect on the magnesium alloy substrate.
作者
李嘉豪
范传伟
刘治博
王伟
LI Jiahao;FAN Chuanwei;LIU Zhibo;WANG Wei(College of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《材料导报》
CSCD
北大核心
2023年第S02期406-412,共7页
Materials Reports
基金
上海工程技术大学大学生创新项目(cs2205001)
国家自然科学基金(51271111)。
关键词
电泳沉积
羟基磷灰石
还原氧化石墨烯
氧化锌
复合涂层
镁合金
electrophoretic deposition
hydroxyapatite
reduced graphene oxide
zinc oxide
composite coating
magnesium alloy
