Design of Cu{sub 8}Zr{sub 5}-based bulk metallic glasses
- Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)
Basic polyhedral clusters have been derived from intermetallic compounds at near-eutectic composition by considering a dense packing and random arrangement of atoms at shell sites. Using such building units, bulk metallic glasses can be formed. This strategy was verified in the Cu-Zr binary system, where we have demonstrated the existence of Cu{sub 8}Zr{sub 5} icosahedral clusters in Cu{sub 61.8}Zr{sub 38.2}, Cu{sub 64}Zr{sub 36}, and Cu{sub 64.5}Zr{sub 35.5} amorphous alloys. Furthermore, ternary bulk metallic glasses can be developed by doping the basic Cu-Zr alloy with a minority element. This hypothesis was confirmed in systems (Cu{sub 0.618}Zr{sub 0.382}){sub 100-x}Nb{sub x}, where x=1.5 and 2.5 at. %, and (Cu{sub 0.618}Zr{sub 0.382}){sub 98}Sn{sub 2}. The present results may open a route to prepare amorphous alloys with improved glass forming ability.
- OSTI ID:
- 20779397
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 88; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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