Metallurgical and Materials Transactions A

, Volume 43, Issue 8, pp 2598–2603 | Cite as

Designing Zr-Cu-Co-Al Bulk Metallic Glasses with Phase Separation Mediated Plasticity

  • Jin Man ParkEmail author
  • Jun Hee Han
  • Norbert Mattern
  • Do Hyang Kim
  • Jurgen Eckert
Symposium: Bulk Metallic Glasses VIII


New Zr-based bulk metallic glasses (BMGs) with improved plasticity were developed in the Zr-Cu-Co-Al system by a combination of Zr45Cu50Al5 and Zr55Co25Al20 BMGs with a certain concentration ratio. The compressive plasticity of the investigated alloys depends strongly on the concentration ratio of the two BMGs. Because of the positive enthalpy of mixing between Cu and Co (ΔHCu-Co = +9 kJ/mol), a strong repulsive interaction between Cu and Co is introduced, whereas an attractive interaction exists among the other constituent elements in the liquid state. When two BMGs are combined at a 1:1 concentration ratio, a maximum compressive plasticity of ~12 pct is achieved for the Zr50Cu25Co12.5Al12.5 BMG. The plasticity enhancement is attributed to atomic-scale chemical/structural fluctuations achieved through liquid-phase separation.


Shear Band Constituent Element Bulk Metallic Glass Glassy Alloy Fracture Surface Morphology 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by the Global Research Laboratory Program of the Korea Ministry of Education, Science and Technology and by the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program funded by the Korea Ministry of Knowledge Economy. Stimulating discussions with B.J. Park, K.B. Kim, S.W. Sohn, U. Kühn and W.T. Kim are gratefully acknowledged.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2012

Authors and Affiliations

  • Jin Man Park
    • 1
    Email author
  • Jun Hee Han
    • 1
    • 2
  • Norbert Mattern
    • 1
  • Do Hyang Kim
    • 3
  • Jurgen Eckert
    • 1
    • 2
  1. 1.Institute for Complex Materials, IFW DresdenDresdenGermany
  2. 2.Institute of Materials Science, TU DresdenDresdenGermany
  3. 3.Department of Metallurgical EngineeringCenter for Non-Crystalline Materials, Yonsei UniversitySeoulRepublic of Korea

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