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A new Cu–Hf–Al ternary bulk metallic glass with high glass forming ability and ductility |
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| Authors: | P. Jia H. Guo Y. Li J. Xu E. Ma |
| Affiliation: | aShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China bDepartment of Materials Science and Engineering, National University of Singapore, Engineering Drive 1, Singapore 117675, Singapore cDepartment of Materials Science and Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA |
| Abstract: | We have discovered a new Cu-based bulk metallic glass (BMG). Although of a simple Cu49Hf42Al9 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 ΔTx and the reduced glass transition temperature Trg 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. |
| Keywords: | Metallic glasses Bulk amorphous alloys Glass-forming ability Copper Plasticity Ductility |
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