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Journal of Materials
Volume 2013 (2013), Article ID 575640, 5 pages
http://dx.doi.org/10.1155/2013/575640
Research Article

Glass Formation in Ni-Zr-(Al) Alloy Systems

State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

Received 12 April 2013; Accepted 3 August 2013

Academic Editor: Ram Katiyar

Copyright © 2013 Lanping Huang and Song Li. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Structural and thermal properties of binary ( ) alloys obtained by melt spinning and copper mold casting methods were investigated. The fully amorphous samples in a bulk form cannot be obtained in the binary Ni-Zr alloys over a wide composition range, though they have and values close to or even higher than those of the binary Cu-Zr bulk metallic glasses (BMGs). The low thermal stability of the supercooled liquid against crystallization and the formation of the equilibrium crystalline phases with a high growth rate are responsible for their low glass-forming abilities (GFAs). Relatively low thermal conductivities of Ni-based alloys are also considered to be another factor to limit their GFAs. The GFA of the binary Ni65.5Zr34.5 alloy alloyed with 4% or 5% Al was enhanced, and a fully glassy rod with a diameter of 0.5 mm was formed.