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http://dx.doi.org/10.3365/KJMM.2011.49.12.930

Miscibility Gap in Cu-Zr-Ag Alloy System and its Effect on the Structure and Plasticity of Metallic Glass  

Lee, Jin-ju (Department of Materials Science and Engineering, Yonsei University)
Park, Kyoung-Won (Center for Biomaterials, Biomedical Institute, Korea Institute of Science and Technology)
Kim, Do-Hyang (High Temperature Energy Materials Center, Korea Institute of Science and Technology)
Fleury, Eric (Department of Materials Science and Engineering, Yonsei University)
Publication Information
Korean Journal of Metals and Materials / v.49, no.12, 2011 , pp. 930-936 More about this Journal
Abstract
In the present study, we show that the addition of Ag, an element having a positive enthalpy of mixing with Cu in the liquid state, enables the simultaneous enhancement of the glass forming ability and the plasticity in Cu-Zr-Ag bulk metallic glasses (BMGs). Rods of 4 mm diameter could be prepared with a fully amorphous structure and values of plastic strain up to 18% were measured under a compression mode for compositions around $Cu_{42.5}Zr_{47.5}Ag_{10}$. The possible role of Ag in the change of the atomic structure and the enhancement of the plastic strain in the ternary Cu-Zr-Ag BMGs is discussed based on analyses from transmission electron microscopy and EXAFS (extended X-ray absorption fine structure).
Keywords
amorphous; Cu-Zr based BMGs; EXAFS; 3D-AP; plasticity;
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