A new Cu–Hf–Al ternary bulk metallic glass with high glass forming ability and ductility

✍ Scribed by P. Jia; H. Guo; Y. Li; J. Xu; E. Ma

• Book ID: 113896090
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 319 KB
• Volume: 54
• Category: Article
• ISSN: 1359-6462
• DOI: 10.1016/j.scriptamat.2006.02.042

✦ Synopsis

We have discovered a new Cu-based bulk metallic glass (BMG). Although of a simple Cu 49 Hf 42 Al 9 ternary composition, the as-cast alloy is a monolithic, uniform BMG with a critical diameter as large as 10 mm. The width of the supercooled liquid region DT x and the reduced glass transition temperature T rg for this glass are 85 K and 0.62, respectively. In addition to its high glass-forming ability and high density of $11 g/cc, this BMG exhibits high ductility with a compressive plastic strain of 11-13%, making it a good candidate for applications as well as for studies of deformation behavior of Cu-based BMGs.