Effect of Sr Element on the Glass Forming Ability and Corrosion Properties of Bulk Mg-Zn-Ca Alloys

被引：0
|
作者：
Wang Jianli [1 ,2 ,3 ]
Wan Yin [1 ,2 ,3 ]
Zhu Meiling [1 ,2 ,3 ]
Ma Zhijun [1 ,2 ,3 ]
Guo Yongchun [1 ,2 ,3 ]
Yang Zhong [1 ,2 ,3 ]
Li Jianping [1 ,2 ,3 ]
机构：
[1] Xian Technol Univ, Xian 710021, Shaanxi, Peoples R China
[2] Shaanxi Engn Res Ctr Mg Light Metall Alloys & Com, Xian 710021, Shaanxi, Peoples R China
[3] Shaanxi Key Lab Optoelect Funct Mat & Devices, Xian 710021, Shaanxi, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2018年 / 47卷 / 07期
关键词：
Mg-Zn-Ca-Sr amorphous alloys; glass forming ability; corrosion properties; SUPERCOOLED LIQUID REGION; AMORPHOUS-ALLOYS; CRYSTALLIZATION; STRONTIUM; BONE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to improve the glass forming ability of Mg-Zn-Ca alloy, Mg-Zn-Ca-Sr alloy rod samples of Phi=2 mm and Phi=4 mm with different Sr contents were prepared by a copper mould injection method. Effects of Sr addition on glass forming ability and corrosion properties in simulated body fluids of Mg-Zn-Ca alloys were studied by X-ray diffraction, scanning electron microscopy, differential scanning calorimeter and electrochemical test. The results show that with the increase of Sr content, the rod samples of Phi=2 mm are all in completely amorphous state. While the microstructure of rod samples of Phi=4 mm are composed of amorphous phase and crystalline (Mg and MgZn) phases. However, the volume fraction and particle size decrease with the increase of Sr content, which indicate that the glass forming ability of Mg-Zn-Ca alloy is enhanced by Sr element addition. Mg65Zn30Ca4Sr1 alloy exhibits the highest glass forming ability. The results of electrochemical test demonstrate that Sr-doped samples show more positive corrosion potential and smaller corrosion current density, which suggest that the corrosion resistance is improved with the increase of Sr content. The corrosion resistance of Mg65Zn30Ca4.5Sr0.5 alloy is the highest among the rod samples of Phi=2 mm, while the corrosion resistance of Mg65Zn30Ca4Sr1 alloy is the best among the rod samples of Phi=4 mm.
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页码：2151 / 2158
页数：8
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