摘要
为了进一步降低镁合金微弧氧化(MAO)涂层的降解速率并提高其耐磨性能,通过在电解液中加入纳米Y_(2)O_(3)的方法,制备含纳米Y_(2)O_(3)的镁合金MAO涂层,并借助显微结构观察、磨损实验、电化学实验、浸泡实验和细胞毒性实验对其进行研究。结果表明,微弧氧化涂层中主要含有Ca_(8)YMg(PO_(4))_(7)和Y_(2)O_(3)颗粒,Ca_(8)YMg(PO_(4))_(7)能稳定涂层,纳米Y_(2)O_(3)能封闭微孔,从而降低涂层的降解速率,并提高其耐磨性。在Hank’s溶液中,涂层的降解速率从0.14 mm/a降至0.06 mm/a。在相同摩擦距离下,涂层体积损失从0.46 mm^(3)降至0.27 mm^(3)。MAO涂层具有良好的生物相容性,细胞相对增殖率(RGR)超过90%。含纳米Y_(2)O_(3)的MAO涂层具有良好的生物医学应用前景。
In order to further improve the degradation resistance and wear property of micro-arc oxidation(MAO)coating on magnesium alloys,nano-Y_(2)O_(3)was added into the electrolyte to fabricate a nano-Y_(2)O_(3)-containing MAO coating.Microstructural characterization,wear test,electrochemical test,immersion test and cytotoxicity test were carried out.The results showed that there were mainly Ca8MgY(PO4)7 and Y_(2)O_(3)particles in the MAO coating.Ca8MgY(PO4)7 could stabilize the coating and the nano-Y_(2)O_(3)could seal the micro-pores.Therefore,both the degradation resistance and wear property of the coating were improved.The degradation rate decreased from 0.14 to 0.06 mm/a in Hank’s solution.The volume loss decreased from 0.46 to 0.27 mm^(3)at the same slip distance.MAO coating exhibited good biocompatibility with the cell relative growth rate(RGR)value of more than 90%.The nano-Y_(2)O_(3)-containing MAO coating thus has a good promising biomedical application.
作者
陈军修
杨洋
Iniobong PETIM
谭丽丽
杨柯
RDKMISRA
王建华
苏旭平
Jun-xiu CHEN;Yang YANG;Iniobong PETIM;Li-li TAN;Ke YANG;RDKMISRA;Jian-hua WANG;Xu-ping SU(Key Laboratory of Materials Surface Science and Technology of Jiangsu Province,Changzhou University,Changzhou 213164,China;Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou University,Changzhou 213164,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Department of Metallurgical,Materials and Biomedical Engineering,University of Texas,El Paso,TX,USA)
基金
supported by the National Natural Science Foundation of China (Nos. 52001034, 51871030)
Changzhou Sci & Tech Program, China (No. CJ20200078)
Natural Science Foundation of Jiangsu Higher Education Institutions of China (No. 20KJB430013)
the Top-notch Academic Programs of Jiangsu Higher Education Institutions, China (TAPP)
the Priority Academic Program Development of Jiangsu Higher Education Institutions, China (PAPD)
