Abstract
The isothermal section of the Zn-Al-Mg-Si quaternary system at 450 °C with Zn fixed at 70 at.% has been determined by means of scanning electron microscopy, energy dispersive spectroscopy and x-ray diffraction. The results show that there exist the following equilibria regions in the isothermal section: Liq. + α-Al + MgZn2 + Mg2Si and Liq. + α-Al + Mg2Si + (Si) four-phase regions, and Liq. + α-Al + Mg2Si, Liq. + α-Al + MgZn2, Liq. + MgZn2 + Mg2Si, Liq. + α-Al + (Si) and Liq. + MgZn2 + (Si) three-phase regions. Si is almost insoluble in MgZn2 and α-Al. The maximum solubility of Al and Zn in Mg2Si is 1.8 and 6.1 at.%, respectively. The maximum solubility of Al and Si in MgZn2 is 3.2 and 0.5 at.%, respectively. No ternary and quaternary compounds were found in this study.
| Original language | English |
|---|---|
| Pages (from-to) | 906-915 |
| Number of pages | 10 |
| Journal | Journal of Phase Equilibria and Diffusion |
| Volume | 38 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Dec 2017 |
| Externally published | Yes |
Keywords
- Zn-Al-Mg-Si
- phase diagram
- phases equilibrium
- quaternary system
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