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Vol.49, No.12, 930 ~ 937, 2011
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| Title |
| Miscibility Gap in Cu-Zr-Ag Alloy System and its Effect on the Structure and Plasticity of Metallic Glass |
| 이진주 Jin Ju Lee , 박경원 Kyoung Won Park , 김도향 Do Hyang Kim , 에릭플러리 Eric Fleury |
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| 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). |
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| Key Words |
| amorphous, Cu-Zr based BMGs, EXAFS, 3D-AP, plasticity |
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