Influence of Cu content on the mechanical properties and corrosion resistance of Mg-Zn-Ca bulk metallic glasses
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第5期
论文作者：Yan-feng Zhao Jian Zhu Li Chang Jing-guo Song Xiao-hua Chen Xi-dong Hui
文章页码：487 - 493
摘 要：(Mg66.2Zn28.8Ca5)100-xCux（at%,x = 0,1,3,and 5） bulk metallic glasses（BMGs） of 2 mm in diameter were prepared by the conventional copper mold injection casting method.Besides,the influence of Cu content on the microstructure,thermal stability,mechanical properties,and corrosion behavior of Mg-Zn-Ca BMGs was investigated.It is found that the addition of Cu decreases the glass-forming ability of Mg-Zn-Ca BMGs.Crystalline phases are precipitated at a higher Cu content,larger than 3at%.The compressive fracture strength of Mg-Zn-Ca BMGs is enhanced by the addition of Cu.With the formation of in-situ composites,the compressive strength of the Mg-Zn-Ca alloy with 3at% Cu reaches 979 MPa,which is the highest strength among the Mg-Zn-Ca alloys.Furthermore,the addition of Cu also results in the increase of corrosion potential and the decrease of corrosion current density in Mg-Zn-Ca BMGs,thereby delaying their biodegradability.
Yan-feng Zhao，Jian Zhu，Li Chang，Jing-guo Song，Xiao-hua Chen，Xi-dong Hui
State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing
摘 要：(Mg66.2Zn28.8Ca5)100-xCux（at%,x = 0,1,3,and 5） bulk metallic glasses（BMGs） of 2 mm in diameter were prepared by the conventional copper mold injection casting method.Besides,the influence of Cu content on the microstructure,thermal stability,mechanical properties,and corrosion behavior of Mg-Zn-Ca BMGs was investigated.It is found that the addition of Cu decreases the glass-forming ability of Mg-Zn-Ca BMGs.Crystalline phases are precipitated at a higher Cu content,larger than 3at%.The compressive fracture strength of Mg-Zn-Ca BMGs is enhanced by the addition of Cu.With the formation of in-situ composites,the compressive strength of the Mg-Zn-Ca alloy with 3at% Cu reaches 979 MPa,which is the highest strength among the Mg-Zn-Ca alloys.Furthermore,the addition of Cu also results in the increase of corrosion potential and the decrease of corrosion current density in Mg-Zn-Ca BMGs,thereby delaying their biodegradability.
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