Glass formation and thermal stability of bulk glassy Cu-Zr-Ti-Sn-Si alloys

Abstract

The new Cu-based bulk glassy alloys in Cu-Zr-Ti-Sn-Si alloy system were formed by copper mold casting. The critical diameter for glass formation is 5 mm for Cu50Zr42.5Ti7.5, and increases to 6 mm for (Cu0.5Zr0.425Ti0.075)99Sn 1 and 7 mm for (Cu0.5Zr0.425Ti 0.075)98.8Sn0.6Si0.6. The minor addition of Sn or Sn and Si in Cu50Zr42.5Ti7.5 causes an increase in the supercooled liquid region from about 40 K to about 50 K, and in the reduced glass transition temperature from about 0.59 to about 0.60. © 2005 The Japan Institute of Metals.