Microstructure and corrosion resistance of as cast Mg-Nd-Gd-Sr-Zn-Zr alloys for biomedical applications

被引：10

作者：

Zhang, X. B. ^{[1
]}

He, X. C. ^{[1
]}

Xue, Y. J. ^{[1
]}

Wang, Z. Z. ^{[1
]}

Wang, Q. ^{[2
]}

机构：

[1] Nanjing Inst Technol, Sch Mat Sci & Engn, Nanjing 211167, Jiangsu, Peoples R China

[2] Jiangsu Konsung Equipment Co Ltd, Danyang 212300, Peoples R China

来源：

MATERIALS TECHNOLOGY | 2014年 / 29卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Magnesium alloy; Microstructure; Corrosion resistance; Uniform corrosion; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; BIOCORROSION BEHAVIOR; DEGRADATION BEHAVIOR; IN-VITRO; EXTRUSION; BIOCOMPATIBILITY; TEMPERATURE; FLUIDS; RATIO;

D O I：

10.1179/1753555714Y.0000000129

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg-(4-x)Nd-xGd- 0.3Sr-0.2Zn-0.4Zr (wt-%, x=0, 1, 2 and 3) alloys were prepared by gravity casting. Microstructure was analysed by X-ray diffraction, optical microscopy and scanning electron microscopy respectively. The alpha-Mg and Mg41Nd5 phases existed in the as cast alloys with 4% and 3% Nd addition, while the new Mg3Gd was found in the alloys with 3% Gd addition. The volume fraction of the second phase reduced with increasing Gd addition and the microstructure was refined by the Gd addition. The corrosion resistance of the alloys was evaluated by mass loss, hydrogen evolution and Tafel polarisation tests. The results showed that the corrosion rate of the alloys decreased with increasing Gd addition even though the corrosion rates of the alloys obtained by different methods showed different values. Moreover, the corrosion morphologies of the alloys were uniform.

引用

页码：179 / 187

页数：9

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