Microstructural, mechanical and corrosion characterization of an as-cast Mg-3Zn-0.4Ca alloy for biomedical applications

被引：47
作者：
Pulido-Gonzalez, N. [1 ]
Torres, B. [1 ]
Rodrigo, P. [1 ]
Hort, N. [2 ]
Rams, J. [1 ]
机构：
[1] Rey Juan Carlos Univ, ESCET, Dept Appl Math Mat Sci & Engn & Elect Technol, C Tulipan S-N, Madrid 28933, Spain
[2] Helmholtz Zentrum Geesthacht, Magnesium Innovat Ctr, D-21502 Geesthacht, Germany
来源：
JOURNAL OF MAGNESIUM AND ALLOYS | 2020年 / 8卷 / 02期
关键词：
Mg-Zn-Ca alloys; Biomaterials; Biodegradable implants; Nanoindentation; Three-point bending test; Corrosion behaviour; HUMAN CORTICAL BONE; MAGNESIUM ALLOYS; MG-ZN; BIODEGRADABLE MAGNESIUM; FRACTURE-TOUGHNESS; HANKS SOLUTION; BEHAVIOR; DEGRADATION; ALUMINUM; BIOCOMPATIBILITY;
D O I：
10.1016/j.jma.2020.02.007
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The as-cast Mg-3Zn-0.4Ca alloy shows a great potential to be used in biomedical applications due to its composition, mechanical properties and biodegradability. Zn and Ca appear naturally in the organism accomplishing vital functions. The alloy consists of an alpha-Mg matrix and a eutectic composed of alpha-Mg + Ca2Mg6Zn3. The eutectic product enhances the mechanical properties of the studied alloy, causing strengthening and providing superior hardness values. In this alloy, cracks initiate at the intermetallic compounds and progress through the matrix because of the open network formed by the eutectics. Attending to the corrosion results, the eutectic product presents a noble potential compared to the alpha-Mg phase. For this reason, the corrosion progresses preferentially through the matrix, avoiding the (alpha-Mg + Ca2Mg6Zn3) eutectic product, when the alloy is in direct contact to Hank's solution. (C) 2020 Published by Elsevier B.V. on behalf of Chongqing University.
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收藏
页码：510 / 522
页数：13
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