Heterogeneity of a Cu{sub 47.5}Zr{sub 47.5}Al{sub 5} bulk metallic glass
- FG Physikalische Metallkunde, FB 11 Material- und Geowissenschaften, Technische Universitaet Darmstadt, Petersenstrasse 23, D-64287 Darmstadt (Germany)
Microstructural investigation of an as-cast Cu{sub 47.5}Zr{sub 47.5}Al{sub 5} bulk metallic glass (BMG) reveals two amorphous phases formed by liquid phase separation. The morphology of the phase separated amorphous regions is spherical with 10-20 nm in size. These areas are homogeneously distributed throughout the sample. Moreover, a macroscopic heterogeneity also occurs along with the nano-scale liquid phase separation. The macroscopic heterogeneity can be distinguished from the different degree of the chemical fluctuations in the sample, and the existence of nano-scale crystals of less than 5 nm in size. Presumably, both the macroscopic heterogeneity and the nano-scale phase separation enhance branching of the shear bands during deformation in the Cu{sub 47.5}Zr{sub 47.5}Al{sub 5} BMG.
- OSTI ID:
- 20778662
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 88; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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