Bulk metallic glass formation in Zr-Cu-Fe-Al alloys

Journal Article · Mon Jun 13 00:00:00 EDT 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1948513· OSTI ID:20702461

Kaifeng, Jin; Loeffler, Joerg F ^[1]

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1. Laboratory of Metal Physics and Technology, Department of Materials, ETH Zuerich, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich (Switzerland)

We have discovered a series of bulk metallic glass-forming alloys of composition (Zr{sub x}Cu{sub 100-x}){sub 80}(Fe{sub 40}Al{sub 60}){sub 20} with x=68-77 and have investigated them by x-ray diffraction, small-angle neutron scattering, and differential scanning calorimetry. All of these alloys exhibit a calorimetric glass transition temperature of 670 K<T{sub g}<687 K and a large undercooled liquid region of widths 73-86 K. The best glass-forming ability is obtained for x{approx_equal}72.5, i.e., for the alloy Zr{sub 58}Cu{sub 22}Fe{sub 8}Al{sub 12}. In rod shape this alloy has a critical casting thickness of 13 mm, as verified by detailed casting experiments, while alloys with x=68 and 77 can still be cast to a thickness of 5 mm. Furthermore, the region where glassy samples with a thickness of 0.5 mm can be prepared extends from x=62-81. The best glass-former, Zr{sub 58}Cu{sub 22}Fe{sub 8}Al{sub 12}, has a tensile yield strength of 1.71 GPa and shows an elastic limit of 2.25%. This new class of Ni-free Zr-based alloys is potentially very interesting for biomedical applications.

• OSTI ID: 20702461
• Journal Information: Applied Physics Letters, Vol. 86, Issue 24; Other Information: DOI: 10.1063/1.1948513; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CALORIMETRY
CASTING
CASTINGS
COPPER ALLOYS
IRON ALLOYS
METALLIC GLASSES
NEUTRON DIFFRACTION
PRESSURE RANGE GIGA PA
SMALL ANGLE SCATTERING
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0400-1000 K
THICKNESS
TRANSITION TEMPERATURE
VITRIFICATION
X-RAY DIFFRACTION
YIELD STRENGTH
ZIRCONIUM ALLOYS