The Nd-Zn phase diagram

Thermodynamic assessment of the Nd–Zn binary system

“…Earlier, Veleckis et al [18] reported that NdZn 11 phase underwent a transition above 540 • C, showing a difference in high temperature stability from the analogous REZn 11 phase. This is consistent with the results of Mason et al [20]. NdZn 12 is isostructural with SmZn 12 [21] and with UZn 12 [22].…”

“…[20]. Only a little departure between the calculated phase diagram and the experimental data exists in the region of 0-20 at.% Zn.…”

“…The difference is probably caused by impurity. The compounds Nd 3 Zn 11 , NdZn 4.46 and Nd 3 Zn 22 decompose peritectically at 870 • C, 902 • C and 950 • C, respectively, while NdZn 3 undergoes peritectoid decomposition at 849 • C. The eutectics were observed at 12 wt pct Zn and 630 • C, 38 wt pct Zn and 868 • C, and 56 wt pct Zn and 854 • C. A eutectoid was observed at 4 wt pct Zn and 622 • C. The experiment information from Mason and Chitti [20] was adopted in the present assessment of the Nd-Zn system.…”

“…Some structural properties of NdZn 2 , NdZn 4.46, and Nd 3 Zn 22 were reported. Mason and Chitti [20] identified the NdZn, NdZn 2 , NdZn 3 , Nd 3 Zn 11 , NdZn 4.46 , Nd 3 Zn 22 , Nd 2 Zn 17 , NdZn 11 and NdZn 12 using metallographic, thermal and X-ray techniques. Earlier, Veleckis et al [18] reported that NdZn 11 phase underwent a transition above 540 • C, showing a difference in high temperature stability from the analogous REZn 11 phase.…”

“…The phase diagram of the Nd-Zn system was systematically investigated by Mason and Chitti [20]. The compounds NdZn, NdZn 2 and Nd 2 Zn 17 melt congruently at 923 • C, 925 • C, 981 • C, respectively.…”