J. Mater. Sci. Technol. ›› 1997, Vol. 13 ›› Issue (2): 141-144.

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A Near-bulk Quasicrystal Alloy Formed in Zn-Mg-Y System

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)   

  • 收稿日期:1997-03-28 修回日期:1997-03-28 出版日期:1997-03-28 发布日期:2009-10-10

A Near-bulk Quasicrystal Alloy Formed in Zn-Mg-Y System

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)   

  • Received:1997-03-28 Revised:1997-03-28 Online:1997-03-28 Published:2009-10-10

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摘要： 1-IntroduCti0nSincethefirstreport0ficooahedralquasicrystal(IQC)phaseinamelt-spunAl86Mn14allOyIll,theIQCshavebeenfoundinmelt-spunAl-(Mn,Cr,Fe,V,W''.),Al-SiMn,(Ti,V)2NiandAl6LiCuall0ys.MostoftheIQCsareformedincomPositionrangeswhereequilibriumphasesareofMank-KaspertroeinwhichicosahedralcoordinationshellsdodrinateinthestructureI2].ThuStheformationofanicosalledralquasicrystalisrelatedtothestructur....

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).