Corrosion degradation behavior of Mg-Ca alloy with high Ca content in SBF
Corrosion degradation behavior of Mg-Ca alloy with high Ca content in SBF
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高Ca含量镁钙合金在SBF中的腐蚀退化行为
DOI：
10.1016/s1003-6326(15)63968-1
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发表时间：
2015-10-01
影响因子：
4.5
通讯作者：
Chen, Min-fang
中科院分区：
文献类型：
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作者：
Liu, Yi-chi;Liu, De-bao;Chen, Min-fang
研究了一种具有潜在骨修复潜力的高钙镁钙合金在模拟体液中的腐蚀降解行为。采用扫描电镜（SEM）和X射线衍射（XRD）对Mg-30% Ca（质量分数）合金的显微组织和相组成进行了分析。将Mg-30% Ca合金试样在模拟体液中浸泡90 d，对腐蚀产物的形貌、成分和细胞毒性进行了研究。结果表明，Mg-30% Ca合金由α-Mg相和Mg 2Ca相组成。在SBF中的腐蚀过程中，Mg 2Ca相充当阳极，α-Mg相充当阴极。Mg-30% Ca合金在模拟体液中的最终腐蚀产物为少量黑色沉淀物和白色悬浮颗粒。白色悬浮颗粒是Mg（OH）（2），黑色颗粒被认为具有核-壳结构。细胞毒性实验表明，这些黑色沉淀物不会诱导细胞毒性。
The corrosion degradation behavior of a Mg-Ca alloy with high Ca content aiming for a potential bone repair material in the simulated body fluid (SBF) was investigated. The microstructure and phase constitution of the pristine Mg-30% Ca (mass fraction) alloy were characterized with scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Mg-30% Ca alloy samples were immersed in the SBF for 90 d, and the morphology, composition and cytotoxicity of the final corrosion product were examined. It is found that Mg-30% Ca alloy is composed of alpha-Mg and Mg2Ca phases. During the corrosion process in the SBF, the Mg2Ca phase acts as an anode and the alpha-Mg phase acts as a cathode. The final corrosion product of the Mg-30% Ca alloy in SBF includes a small amount of black precipitates and white suspended particles. The white suspended particles are Mg(OH)(2) and the black particles are believed to have a core-shell structure. The cytotoxicity experiments indicate that these black precipitates do not induce toxicity to cells.