L(?) Manqi State Key Laboratory of Rapidly Solidified and Non-Equilibrium Alloys,International Centre for Meterials Physics,Institute of Metal Research,Academia Sinica,Shenyang,ChinaWAGENDRISTEL A Iastitut fur Anwend Physik,Technische Universitat in Wien,Austria associate professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China