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采用扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)研究了固溶处理对Mg-2Nd-0.5Zn-0.4Zr和Mg-2Nd-0.5Zn-0.4Zr-3Y两种镁合金显微组织的影响,通过析氢、质量损失测试及电化学方法研究其在模拟体液(SBF)中的生物腐蚀性能;并对比分析了稀土Y的添加对镁合金组织及腐蚀性能的影响。结果表明:经过固溶处理后,合金的大部分析出相溶于基体,其在SBF中腐蚀速率仅为铸态合金的44.35%和46.67%;添加稀土Y使合金中析出相增多,出现新的块状析出相Mg24Y5,合金的耐生物腐蚀性能得到提高。
The effects of solution treatment on the microstructures of Mg-2Nd-0.5Zn-0.4Zr and Mg-2Nd-0.5Zn-0.4Zr-3Y were studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) The effects of rare earth Y on the microstructure and corrosion resistance of magnesium alloy were studied by means of hydrogen evolution, mass loss and electrochemical measurements. The results show that after solution treatment, most of the alloy precipitates in the matrix, and the corrosion rate in the SBF is only 44.35% and 46.67% of that of the as-cast alloy. The addition of rare earth Y increases the precipitated phase in the alloy, Of the massive precipitated phase Mg24Y5, the resistance of the alloy to be improved.