Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Miscibility Gap in Cu-Zr-Ag Alloy System and its Effect on the Structure and Plasticity of Metallic Glass

Cu-Zr-Ag계 비정질 합금의 불혼화 영역이 구조 및 소성에 미치는 영향

  • 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)
  • 이진주 (한국과학기술연구원 고온에너지재료연구센터) ;
  • 박경원 (한국과학기술연구원 의공학연구소 생체재료연구단) ;
  • 김도향 (연세대학교 신소재공학과) ;
  • 에릭플러리 (한국과학기술연구원 고온에너지재료연구센터)
  • Received : 2011.01.17
  • Published : 2011.12.25
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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 $Cu_{42.5}Zr_{47.5}Ag_{10}$. 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

Acknowledgement

Supported by : 교육과학기술부

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