Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application

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	Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application
	E. L. Zhang; L. Yang; J. W. Xu; H. Y. Chen
	2010
发表期刊	Acta Biomaterialia
ISSN	1742-7061
卷号	6 期号:5 页码:1756-1762
摘要	Mg-Si alloy was investigated for biomedical application due to the biological function of Si in the human body. However, Mg-Si alloy showed a low ductility due to the presence of coarse Mg(2)Si. Ca and Zn elements were used to refine and modify the morphology of Mg(2)Si in order to improve the corrosion resistance and the mechanical properties. The cell toxicity of Mg, Zn and Ca metals was assessed by an MTT test. The test results indicated that increasing the concentrations of Mg, Zn and Ca ions did not cause cell toxicity, which showed that the release of these three elements would not lead to cell toxicity. Then, microstructure, mechanical properties and bio-corrosion properties of as-cast Mg-Si(-Ca, Zn) alloys were investigated by optical microscopy, scanning electronic microscopy, mechanical properties testing and electrochemical measurement. Ca element can slightly refine the grain size and the morphology Mg(2)Si phase in Mg-Si alloy. The bio-corrosion resistance of Mg-Si alloys was improved by the addition of Ca due to the reduction and refinement of Mg(2)Si phase; however, no improvement was observed in the strength and elongation. The addition of 1.6% Zn to Mg-0.6Si can modify obviously the morphology of Mg(2)Si phase from course eutectic structure to a small dot or short bar shape. As a result, tensile strength, elongation and bio-corrosion resistance were all improved significantly; especially, the elongation improved by 115.7%. It was concluded that Zn element was one of the best alloying elements of Mg-Si alloy for biomedical application. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[zhang, erlin; xu, jianwei] jiamusi univ, sch mat & engn, jiamusi 154007, peoples r china. [yang, lei; chen, haiyan] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhang, el (reprint author), jiamusi univ, sch mat & engn, jiamusi 154007, peoples r china;zhangerlin2009@163.com
关键词	Magnesium Alloy Microstructure Mechanical Properties Bio-corrosion Properties In-vivo Corrosion Bone Implant Application Mg-si Alloys Magnesium Alloys Mn Alloy Behavior Ca Silicon Vitro Degradation
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WOS记录号	WOS:000277847500011
引用统计	被引频次：235[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31685
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. L. Zhang,L. Yang,J. W. Xu,et al. Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application[J]. Acta Biomaterialia,2010,6(5):1756-1762.
APA	E. L. Zhang,L. Yang,J. W. Xu,&H. Y. Chen.(2010).Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application.Acta Biomaterialia,6(5),1756-1762.
MLA	E. L. Zhang,et al."Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application".Acta Biomaterialia 6.5(2010):1756-1762.