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A Near-bulk Quasicrystal Alloy Formed in Zn-Mg-Y System
Authors:Yali TANG  Ningfu SHEN  Xiaofang LIUZhiping LUOBaicheng LIU
Affiliation:Yali TANG,Ningfu SHEN,Xiaofang LIU(Research Center for Materials,ZhengZhou University of Technology,Zhengzhou,China)Zhiping LUO(Institute of Aeronautical Materials,Beijng,China)Baicheng LIU(Tsinghua University,Beijing,China)
Abstract: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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