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以Mg-6%Zn合金为基体、β-Ca3(PO4)2为强化相,采用粉末冶金工艺制备Mg-6%Zn-10%(β-Ca3(PO4)2)复合材料。利用光学显微镜观察复合材料的显微组织,采用X射线衍射仪分析相组成,采用压缩试验评估复合材料力学性能,采用动电位极化法和浸泡实验研究复合材料在模拟体液(SBF)中的腐蚀行为。结果表明:β-Ca3(PO4)2在烧结过程中与基体合金没有发生明显反应;复合材料密度为1.936 g/cm3,压缩强度为339 MPa,弹性模量为24 GPa;添加β-Ca3(PO4)2可降低Mg-6%Zn在SBF中的腐蚀速度;Mg-6%Zn-10%(β-Ca3(PO4)2)复合材料在SBF中的电化学腐蚀速度为2.277 mm/y,浸泡30 d的浸泡腐蚀速度为2.133 mm/y,SBF的pH值随着浸泡时间的延长而上升,最终稳定在10。
The Mg-6% Zn-10% (β-Ca3 (PO4) 2) composite was prepared by powder metallurgy using β-Ca3 (PO4) 2 as matrix and Mg-6% Zn alloy as matrix. The microstructure of the composites was observed by light microscopy. The phase composition was analyzed by X-ray diffractometer. The mechanical properties of the composites were evaluated by compression test. The corrosion of the composites in simulated body fluid (SBF) was investigated by potentiodynamic polarization and immersion experiments behavior. The results showed that β-Ca3 (PO4) 2 did not react significantly with the matrix alloy during sintering. The density of the composite was 1.936 g / cm3, the compressive strength was 339 MPa and the elastic modulus was 24 GPa. The addition of β-Ca3 (PO4) ) 2 can reduce the corrosion rate of Mg-6% Zn in SBF. The electrochemical corrosion rate of Mg-6% Zn-10% (β-Ca3 (PO4) 2) composite in SBF is 2.277 mm / The soaking corrosion rate at 30 d was 2.133 mm / y. The SBF pH value increased with the soaking time and finally stabilized at 10.