Experimental Investigation of the Mg–Zn–Zr Isothermal Section at 400 °C
来源期刊：Acta Metallurgica Sinica2019年第4期
论文作者：Yong-Peng Liang Shu-Hong Liu Kai Xu Yong Du
文章页码：426 - 432
摘 要：Mg-Zn-Zr series Mg alloys（ZK） are one of the most important commercial Mg alloys due to their good comprehensive mechanical properties. The phase equilibria of the Mg-Zn-Zr system at 400 ℃ covering the overall composition range were investigated by X-ray diffraction and electron probe microanalyses on thirteen ternary alloys. Three ternary compounds, τ1, τ2 and τ3, were detected to be thermodynamically stable at 400 ℃, and their homogeneity range was determined to be Mg（7-17）Zn（80-88）Zr（4-6）, Mg（15-22）Zn（66-65）Zr（9-16） and Mg9 Zn68Zr23（in at.%）, respectively. Eight three-phase regions and four two-phase regions were observed. The maximum solubility of Mg in Zn22 Zr, Zn39 Zr5 and Zn3 Zr phases was measured to be 0.52, 0.37 and 0.99 at.%, respectively, while the solubility of Zr in MgZn2 and Mg2 Zn3 phases is negligible. The isothermal section of the Mg-Zn-Zr system at 400 ℃ was then constructed based on the present experimental data.
Yong-Peng Liang1，Shu-Hong Liu1，Kai Xu1,2，Yong Du2
1. State Key Lab of Powder Metallurgy,Central South University2. School of Materials Science and Engineering,Central South University
摘 要：Mg-Zn-Zr series Mg alloys（ZK） are one of the most important commercial Mg alloys due to their good comprehensive mechanical properties. The phase equilibria of the Mg-Zn-Zr system at 400 ℃ covering the overall composition range were investigated by X-ray diffraction and electron probe microanalyses on thirteen ternary alloys. Three ternary compounds, τ1, τ2 and τ3, were detected to be thermodynamically stable at 400 ℃, and their homogeneity range was determined to be Mg（7-17）Zn（80-88）Zr（4-6）, Mg（15-22）Zn（66-65）Zr（9-16） and Mg9 Zn68Zr23（in at.%）, respectively. Eight three-phase regions and four two-phase regions were observed. The maximum solubility of Mg in Zn22 Zr, Zn39 Zr5 and Zn3 Zr phases was measured to be 0.52, 0.37 and 0.99 at.%, respectively, while the solubility of Zr in MgZn2 and Mg2 Zn3 phases is negligible. The isothermal section of the Mg-Zn-Zr system at 400 ℃ was then constructed based on the present experimental data.
关键词：
