Gd添加量对Zn-1.2Cu-1.2Mg锌合金组织和性能的影响

Effect of Gd Addition Amount on Microstructure and Properties of Zn-Zn-1.2Cu-1.2MggZinc Alloy M

研究了Zn-1.2Cu-1.2Mg-x Gd(x=0,0.1,0.25,0.5,质量分数,%)锌合金微观组织、在模拟体液中的腐蚀行为和力学性能。结果表明,锌合金组织主要由Zn固溶体和Mg_(2)Zn_(11)金属间化合物组成。当Gd添加量为0.5%时,形成了GdZn_(12)化合物。锌合金的硬度随Gd添加量的增加而增加,在0.5%Gd添加量时,硬度达到最大值为1530 MPa。在0.25%Gd添加量时锌合金具有高的抗拉伸强度,而在0.1%Gd添加量时锌合金具有最低的腐蚀速率。

The microstructure,immersion corrosion behaviour in simulated body fluid and mechanical properties of Zn-1.2Cu-1.2Mgx Gd(x=0,0.1,0.25,0.5,wt%)alloys were studied.The results show that the microstructure of zinc alloy is mainly composed of Zn solid solution and Mg_(2)Zn_(11)intermetallic compound.When Gd addition content is 0.5wt%,the GdZn_(12)intermetallic compound appears.The microhardness of zinc alloy increases with the increase of Gd addition content,and when the addition content of Gd is0.5wt%,the microhardness reaches maximum,1530 MPa.The tensile strength increases first and decreases afterwards,and when the Gd addition content is 0.25wt%,the zinc alloy has high tensile strength.Zinc alloy with 0.1wt%Gd addition content has the lowest corrosion rate.