Yali TANG
,
Ningfu SHEN
,
Xiaofang LIU(Research Center for Materials
,
ZhengZhou University of Technology
,
Zhengzhou 450002
,
China)Zhiping LUO(Institute of Aeronautical Materials
,
Beijng 100095
,
China)Baicheng LIU(Tsinghua University
,
Beijing 100084
,
China)
材料科学技术（英）
Zn-Mg-Y and Mg-Zn-Y-Zr ingots with different chemical compositions were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The icosahedral phases were found in all alloys studied in present work under the as-cast conditions. There are nearly all quasicrystal phases with some MgZn2 Laves phase in a Zn-28.31Mg-13.80Y alloy (wt pct).After annealing at 400℃ for 8 h, the quasicrystal phases transformed to an fcc "W" phase in an Mg-5.57Zn-1.08Y-0.60Zr alloy (wt pct).
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