Characterization and corrosion behavior of biodegradable Mg-Ca andMg-Ca-Zn implant alloys

摘要：

　　In the present study binary Mg-xCa (x=0.5 and 1.25wt.%) and ternary Mg-lCa-xZn (x-0.5 and 1.5wt.%) alloys are produced by casting the molten metal in a metal die at a temperature of 740℃.The microstructure analysis of the Mg-Ca and Mg-Ca-Zn alloys were studied by OM,SEM and EDX.The corrosion behavior of alloys was evaluated via potentiodynamic polarization test in Kokubo solution.The result exhibited that the grain size decrease with rising Ca content in Mg-Ca alloys and degree of grain size reduction further decreased by adding Zn to Mg-lCa-Zn alloys.The microstructure of Mg-Ca alloys were constituted of primary Mg and lamellar eutectic (α-Mg+Mg2Ca) phase,Whilst Mg-lCa-Zn alloys were composed of primary Mg and eutectic (α-Mg+Mg2Ca+Ca2Mg6Zn3) phases.In addition with increasing Ca and Zn the amount of Mg2Ca and Ca2Mg6Zn3 increased respectively in grain boundaries.Electrochemical test shows that the addition of Zn leads to improve corrosion resistance of the Mg-lCa-Zn alloys as a result of the formation of Ca2Mg6Zn3 phase,whilst the addition of more than 0.5 wt% Ca to Mg-Ca alloys result in decreasecorrosion resistance due to the formation Mg2Ca.

关键词： Magnesium alloy Microstructure analysis Corrosion behavior

作者: Hamid Reza Bakhsheshi Rad Mohd Hasbullah Idris Mohammed Rafiq Abdul Kadir Saeed Farahany Amir Fereidouni Mohd Yazid Yahya

作者单位: Matedals Engineering Dept., Faculty of Mechanical Engineering, Universiti Teknologi Malaysia,Skudai 81310, Johor, Malaysia

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 568-572

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）