Isothermal Section Of Mg-Zn-Lasystem In Mg Rich Corner At 350℃

Abstract

Abstract: Alloys of Mg-Zn-La system in Mg rich corner at　350℃ have been prepared in this study. Scanning electron　microscopy (SEM), electron probe microanalysis with energy　dispersive X-ray spectroscopy (EPMA-EDS), and X-ray diffraction　(XRD) have been used to identify the phase equilibrium and the　composition of each phase in the alloys. As a result, the isothermal　section of Mg-Zn-La system in Mg rich corner at 350℃ has　been determined. The result shows that, in addition to some binary　phases, there exists a linear ternary compound called T-phase in　Mg-Zn-La system at 350℃, in which the La content is about　8 at. pct ±0.4at.pct and the Zn content is 8at. pct-48 at.pct. The T-phase has a C-centered orthorhombic crystal structure,　and the lattice parameters are a=0.965-1.020 nm,b=1.121-1.142nm, c=0.950-0.977 nm.

Key words: Mg-Zn-La system, Phase equilibrium, T-phase, Isothermal　section

M.L. Huang, H.X. Li, H. Ding, Y.P.Ren, S.M. Hao. Isothermal Section Of Mg-Zn-Lasystem In Mg Rich Corner At 350℃[J]. Acta Metallurgica Sinica (English Letters), 2008, 21(5): 329-335 .

References

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