Influence of heat treatment on degradation behavior of bio-degradable die-cast AZ63 magnesium alloy in simulated body fluid

被引：159
|
作者：
Liu, Chenglong
Xin, Yunchang
Tang, Guoyi
Chu, Paul K.
机构：
[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
[2] Tsing Hua Univ, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2007年 / 456卷 / 1-2期
关键词：
AZ63 magnesium alloy; aging; corrosion resistance; degradation; simulated body fluid;
D O I：
10.1016/j.msea.2006.12.020
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of hybrid aging and solution treatments on the degradation of bio-degradable die-cast AZ63 magnesium alloy in 37 +/- 1 degrees C Tyrode's simulated body fluid have been investigated. The heat treatment is observed to alter the microstructure of the alloy. The amount Of beta-Mg17Al2 precipitates is larger and their distribution is more homogeneous. The homogeneous microstructure enhances the corrosion resistance of the alloy and the best corrosion rate achieved on the aged sample is approximately 1/2 of that of the untreated alloy. The corrosion mechanism of the aged alloy is dominated by filiform and pitting corrosion. Better understanding and control of surface corrosion will expedite the use of Mg alloys in biomedical implants. (C) 2006 Elsevier B.V. All rights reseved.
引用
收藏
页码：350 / 357
页数：8
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