Study of the Phases of Mg-Zn-La Magnesium Alloys at 150°C

Abstract:

Alloys with different compositions in Mg-rich corner of Mg-Zn-La system at 150°C were prepared, and the phase equilibrium in Mg-Zn-La alloys were determined by scanning electron microscopy (SEM), electron probe microanalysis based on energy dispersive X-ray spectroscopy (EPMA-EDS) and X-ray diffraction (XRD). The stability, compositions and lattice structures of the intermetallic compounds of Mg-Zn-La alloys were identified. The results show that, there exists a ternary compound (T-phase) with constant La (about 8at%) and the changed ratio of Mg/Zn in the Mg-rich corner of Mg-Zn-La system. Though the ratio of (Mg, Zn)/La of T-phase is close to that of Mg/La of Mg₁₂La, the T-phase was not the binary solid solution of Mg₁₂La because of the difference of the lattice structure. It also reveals that T-phase is a stable phase, and it is in two-phase equilibrium of T-phase+Mg at 150°C.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 679-682
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.679
• Online since: August 2013
• Authors: Ming Li Huang, Li Na Dong, Ying Ling Wang, Li Wei Quan
• Keywords: Lattice Structure, Mg-Zn-La Alloys, Phase Equilibrium, Ternary Compound

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