2008 Volume 49 Issue 11 Pages 2743-2746
We herein report the unusual glass-forming ability (GFA) of a new series of quinary Zr48Cu36−xNixAg8Al8 (0<x≤10 in at%) alloys, in which Ni-Ag element pair is an immiscible system with a large positive heat of mixing. Addition of Ni lowers the liquidus temperature of the quaternary Zr48Cu36Ag8Al8 alloy. By copper mold casting, an as-cast glassy rod with a diameter of 30 mm can be easily obtained for the representative alloy Zr48Cu32Ni4Ag8Al8. The possible reasons for the excellent GFA of the new quinary alloys with an immiscible element pair are discussed based on the atomic size distribution, chemical compatibility among the components and atomic structure of glassy alloys.