| Title |
Miscibility Gap in Cu-Zr-Ag Alloy System and its Effect on the Structure and Plasticity of Metallic Glass |
| Authors |
이진주(Jin Ju Lee); 박경원(Kyoung Won Park); 김도향(Do Hyang Kim); 에릭플러리(Eric Fleury) |
| DOI |
https://doi.org/10.3365/KJMM.2011.49.12.930 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
amorphous; Cu-Zr based BMGs; EXAFS; 3D-AP; plasticity |
| 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 Cu42.5Zr47.5Ag10. 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). |