Фазовая диаграмма системы Mg-Zn

К оглавлению: Другие диаграммы (Others phase diargams)

Mg-Zn (Magnesium-Zinc) J.B. Clark, L. Zabdyr, and Z. Moser The assessed Mg-Zn phase diagram is based primarily on the work of [28Cha], [ 29Hum], [57Cla], and [57Par] and was constructed using thermodynamic modeling. The peritectic temperature for the formation of Mg2Zn11 is 381 C. On freezing of eutectic alloys, the formation of Mg2Zn11 is sometimes suppressed, and a metastable eutectic structure, MgZn2 + (Zn), forms. A metastable phase forms during the eutectoid decomposition of the Mg7Zn3 phase, as well as during the precipitation of MgZn from the (Mg) solid solution. The formation of GP zones has been reported during aging of supersaturated (Mg) solid solution at 70 C. Age hardening of the Mg solid solution was achieved by precipitation of MgZn as a coherent transition lattice, designated MgZn›, in the form of long, thin rods perpendicular to the basal plane of the Mg matrix. Metallic glasses of Mg-Zn alloys, stable at room temperature, have been made near the composition of Mg7Zn3 at 25 to 35 at.% Zn. This amorphous metal is only marginally stable at10 C. 28Cha: R.J. Chadwick, J. Inst. Met., 39, 285-299 (1928). 29Hum: W. Hume-Rothery and E.D. Rounsefell, J. Inst. Met., 41, 119-138 (1929). 57Cla: J.B. Clark and F.N. Rhines, Trans. AIME, 209, 425-430 (1957). 57Par: J.J. Park and L.L. Wyman, WADC Tech. Rep. 57-504, Astia Document No. AD142110, 1-27 (1957). Published in Phase Diagrams of Binary Magnesium Alloys, 1988. Complete evaluation contains 3 figures, 8 tables, and 64 references. Special Points of the Mg-Zn System