文档介绍：44 11 2008 11 1388—1393 ACTA METALLURGICA SINICA Nov. 2008 –1393 FEM ?( ( ) , 110016) (Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA) ?uctuation electron microscopy (FEM) Al 85Ni 5Y 10?xCo x(x=0, 2) Cu 46Zr 54?xAl x(x=0, 7) , . , 2 ; . . , , FEM A 0412?1961(2008)11?1388?06 A FLUCTUATION ELECTRON MICROSCOPY STUDY OF MEDIUM–RANGE ORDER IN METALLIC GLASSES WEN Jun, WANG Jianqiang Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 MA En Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA Correspondent: WANG Jianqiang, professor, Tel: (024)23971902, E-mail: ******@imr. Supported by National Basic Research Program of China (No. 2007CB613906) Manuscript received 2008–05–07, in revised form 2008–07–10 ABSTRACTAl 85Ni 5Y 10?xCo x(x=0, 2) and Cu 46Zr 54?xAl x(x=0, 7) metallic glasses (MGs) have been examined using ?uctuation electron microscopy (FEM).Strong medium–range order (MRO) was revealed in both MG systems. Minor additions of Co into the Al 85Ni 5Y 10and Al into the Cu 46Zr 54, forming Al 85Ni 5Y 8Co 2and Cu 46Zr 47Al 7MGs, render the medium–range structure more homogeneous. This is in a good agreement with the increase of glass–forming ability in these two systems. KEY WORDSm