期刊
MATERIALIA
卷 16, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtla.2021.101089
关键词
Mg-Cu alloy; Microstructure; Mechanical properties; Degradation behavior; Biocompatibility
资金
- National Key Research and Development Program of China [2016YFC1101804, 2016YFC1100604]
- National Natural Science Foundation of China [51971222]
- Talent Development ProgramOutstanding Youth Fund of Jilin Province [20190103053JH]
- Youth Innovation Promotion Association, CAS
The study found that magnesium-copper alloys with low copper content and solid solution treatment exhibit better mechanical properties and corrosion resistance, while alloys with higher copper content are prone to corrosion. The decrease in Mg2Cu phase content in the solid solution treated alloys leads to improved corrosion resistance and better biocompatibility.
In this work, mechanical properties, degradation behavior and biocompatibility of as-extruded and solid solution treated Mg-Cu binary alloy with 0.22 and 0.45 wt.% Cu additions have been investigated, and the effects of main microstructural parameters (grain size, dislocation, second phase distribution and content) on these properties are analyzed. Mechanical tests revealed that as-solutionized Mg-Cu alloys (with larger grain size and less content of Mg2Cu phase) exhibited better mechanical properties than the as-extruded alloys. Strengthening effects of the microstructural parameters have been analyzed and quantified. The results suggested that the inverse elevation of the yield strength was mainly related to the over-solubility of Cu atom in the matrix. Immersion tests showed that the solid solution treatment improved the corrosion resistance of Mg-0.2Cu alloy (with 0.22 wt.% Cu) but deteriorated it seriously for Mg-0.5Cu alloy (with 0.45 wt.% Cu). The enhanced corrosion resistance of Mg-0.2Cu alloy was owing to the apparent decrease of Mg2Cu phase content. In contrast, the deterioration of corrosion resistance for Mg-0.5Cu alloy was attributed to the distribution change of the Mg2Cu phase from diffuse to local, because large localized Mg2Cu particles can lead to severer corrosion of the matrix. Cytotoxicity experiments revealed that the as-solutionized Mg-0.2Cu alloy with the least Mg2Cu phase content exhibited the best biocompatibility due to its slower degradation rate.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据