Formation of Zr-Based Bulk Metallic Glasses from Low Purity of Materials by Yttrium Addition

Abstract

Zr 55 Al 15 Ni 10 Cu 20 bulk metallic glass is formed using low purity materials at a low vacuum with a small amount of yttrium addition. It is found that the glass forming ability, crystallization and melting process of the Zr 55 Al 15 Ni 10 Cu 20 alloy are modified with yttrium addition, while the mechanical and elastic properties, such as hardness and Young's Modulus, are not obviously changed. The positive effect of yttrium addition on the glassy formation of the Zr 55 Al 15 Ni 10 Cu 20 alloy is clarified.