中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 33 No. 5 May 2023 |
（1. Key Laboratory of Materials Surface Science and Technology of Jiangsu Province, Changzhou University, Changzhou 213164, China;
2. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China;
3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
4. Department of Metallurgical, Materials and Biomedical Engineering, University of Texas, El Paso, TX, USA）
Abstract:In order to further improve the degradation resistance and wear property of micro-arc oxidation (MAO) coating on magnesium alloys, nano-Y2O3 was added into the electrolyte to fabricate a nano-Y2O3-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 Y2O3 particles in the MAO coating. Ca8MgY(PO4)7 could stabilize the coating and the nano-Y2O3 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 mm3 at the same slip distance. MAO coating exhibited good biocompatibility with the cell relative growth rate (RGR) value of more than 90%. The nano-Y2O3-containing MAO coating thus has a good promising biomedical application.
Key words: nano-Y2O3; MAO coating; wear property; degradation resistance; biocompatibility
